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Convert NAD27 to WGS 84

Convert coordinates from NAD27 (EPSG:4267) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4267-to-epsg-4326

About converting NAD27 to WGS 84

Converting from NAD27 (EPSG:4267) to WGS 84 (EPSG:4326) is the conversion needed to bring legacy U.S. survey records, pre-1980s USGS quads, deeds, mining claims and oil-and-gas leases into modern coordinate systems.

NAD27 is built on the Clarke 1866 ellipsoid with origin at Meades Ranch, Kansas. Its difference from WGS 84 varies regionally across CONUS — from about 30 m on the East Coast to over 100 m in the Pacific Northwest. There is no single Helmert seven-parameter fit that works well everywhere; high-accuracy conversion requires the NADCON grid-shift files. Browser-based tools (this one included) use Helmert parameters and give 1-5 m accuracy.

For visualisation or context, the Helmert result is usually fine. For legal, cadastral or surveying applications you must apply the official NADCON grid shift in a desktop GIS or via NGS's online VDatum / NCAT services.

Why people convert EPSG:4267 to EPSG:4326

  • Importing pre-1980s USGS topographic data
  • Migrating historical survey records into modern GIS
  • Reconciling old deed descriptions with modern parcel data
  • Converting historical aerial-photo control points

Official EPSG transformations from NAD27 to WGS 84

The EPSG Geodetic Parameter Dataset defines 78 transformations between NAD27 (EPSG:4267) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

NAD27 to WGS 84 (89)

EPSG:7698±1 mBest accuracy
Method:
Coordinate Frame rotation (geog2D domain)
Area of use:
Panama - onshore
Scope:
Transformation of coordinates at 1m level of accuracy.
ParameterValueUnit
X-axis translation(tx)-32.3841359metre
Y-axis translation(ty)180.4090461metre
Z-axis translation(tz)120.8442577metre
X-axis rotation(rx)2.1545854arc-second
Y-axis rotation(ry)0.1498782arc-second
Z-axis rotation(rz)-0.5742915arc-second
Scale difference(ds)8.1049164parts per million

Derived at stations in the provinces of Colón, Panamá, Coclé, Veraguas, Herrera, Los Santos y Chiriquí. Standard deviation 0.871m in north and 0.531m in east.

NAD27 to WGS 84 (88)

EPSG:15978±1 m
Method:
Coordinate Frame rotation (geog2D domain)
Area of use:
Cuba
Scope:
Transformation of coordinates at 1m level of accuracy.
ParameterValueUnit
X-axis translation(tx)2.478metre
Y-axis translation(ty)149.752metre
Z-axis translation(tz)197.726metre
X-axis rotation(rx)-0.526arc-second
Y-axis rotation(ry)-0.498arc-second
Z-axis rotation(rz)0.501arc-second
Scale difference(ds)0.685parts per million

NAD27 to WGS 84 (34)

EPSG:1692±1.5 m
Method:
NTv2
Area of use:
Canada - Quebec
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Grid file: NA27SCRS.GSB

Parameter file is from NAD27 to NAD83(CSRS)v2 (1) (code 9239) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation. Also distributed as QUE27-98.gsb.

NAD27 to WGS 84 (32)

EPSG:1703±1.5 m
Method:
NTv2
Area of use:
Canada - Saskatchewan
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Grid file: SK27-98.gsb

Parameter file is from NAD27 to NAD83(CSRS)v2 (2) (code 9886) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (37)

EPSG:8590±1.5 m
Method:
Concatenated operation
Area of use:
USA - Alabama
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (21) (null)

Transformation steps are from NAD27 to NAD83(HARN) (1) (code 8460) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (38)

EPSG:8591±1.5 m
Method:
Concatenated operation
Area of use:
USA - Arizona
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (32) (null)

Transformation steps are from NAD27 to NAD83(HARN) (2) (code 8461) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (39)

EPSG:8592±1.5 m
Method:
Concatenated operation
Area of use:
USA - Arkansas
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (12) (null)

Transformation steps are from NAD27 to NAD83(HARN) (38) (code 8586) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (40)

EPSG:8593±1.5 m
Method:
Concatenated operation
Area of use:
USA - California - north of 36.5°N
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (43) (null)

Transformation steps are from NAD27 to NAD83(HARN) (3) (code 8462) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (41)

EPSG:8594±1.5 m
Method:
Concatenated operation
Area of use:
USA - California - south of 36.5°N
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (54) (null)

Transformation steps are from NAD27 to NAD83(HARN) (4) (code 8463) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (42)

EPSG:8595±1.5 m
Method:
Concatenated operation
Area of use:
USA - Colorado
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (16) (null)

Transformation steps are from NAD27 to NAD83(HARN) (5) (code 8464) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (43)

EPSG:8596±1.5 m
Method:
Concatenated operation
Area of use:
USA - Florida
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (18) (null)

Transformation steps are from NAD27 to NAD83(HARN) (7) (code 8466) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (44)

EPSG:8597±1.5 m
Method:
Concatenated operation
Area of use:
USA - Georgia
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (17) (null)

Transformation steps are from NAD27 to NAD83(HARN) (6) (code 8465) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (45)

EPSG:8598±1.5 m
Method:
Concatenated operation
Area of use:
USA - Illinois
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (52) (null)

Transformation steps are from NAD27 to NAD83(HARN) (36) (code 8553) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (46)

EPSG:8599±1.5 m
Method:
Concatenated operation
Area of use:
USA - Indiana
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (46) (null)

Transformation steps are from NAD27 to NAD83(HARN) (30) (code 8509) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (47)

EPSG:8600±1.5 m
Method:
Concatenated operation
Area of use:
USA - Iowa
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (13) (null)

Transformation steps are from NAD27 to NAD83(HARN) (39) (code 8587) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (48)

EPSG:8601±1.5 m
Method:
Concatenated operation
Area of use:
USA - Kansas
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (47) (null)

Transformation steps are from NAD27 to NAD83(HARN) (31) (code 8510) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (49)

EPSG:8602±1.5 m
Method:
Concatenated operation
Area of use:
USA - Kentucky
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (22) (null)

Transformation steps are from NAD27 to NAD83(HARN) (10) (code 8469) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (50)

EPSG:8603±1.5 m
Method:
Concatenated operation
Area of use:
USA - Louisiana
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (23) (null)

Transformation steps are from NAD27 to NAD83(HARN) (11) (code 8470) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (51)

EPSG:8604±1.5 m
Method:
Concatenated operation
Area of use:
USA - Maine
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (25) (null)

Transformation steps are from NAD27 to NAD83(HARN) (13) (code 8472) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (52)

EPSG:8605±1.5 m
Method:
Concatenated operation
Area of use:
USA - Delaware and Maryland
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (24) (null)

Transformation steps are from NAD27 to NAD83(HARN) (12) (code 8471) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (53)

EPSG:8606±1.5 m
Method:
Concatenated operation
Area of use:
USA - New England - south (CT, MA, NH, RI, VT)
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (29) (null)

Transformation steps are from NAD27 to NAD83(HARN) (17) (code 8476) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (54)

EPSG:8607±1.5 m
Method:
Concatenated operation
Area of use:
USA - Michigan
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (26) (null)

Transformation steps are from NAD27 to NAD83(HARN) (14) (code 8473) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (55)

EPSG:8608±1.5 m
Method:
Concatenated operation
Area of use:
USA - Minnesota
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (14) (null)

Transformation steps are from NAD27 to NAD83(HARN) (40) (code 8588) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (56)

EPSG:8609±1.5 m
Method:
Concatenated operation
Area of use:
USA - Mississippi
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (27) (null)

Transformation steps are from NAD27 to NAD83(HARN) (15) (code 8474) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (57)

EPSG:8610±1.5 m
Method:
Concatenated operation
Area of use:
USA - Missouri
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (15) (null)

Transformation steps are from NAD27 to NAD83(HARN) (41) (code 8589) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (58)

EPSG:8611±1.5 m
Method:
Concatenated operation
Area of use:
USA - Idaho and Montana - east of 113°W
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (19) (null)

Transformation steps are from NAD27 to NAD83(HARN) (8) (code 8467) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (59)

EPSG:8612±1.5 m
Method:
Concatenated operation
Area of use:
USA - Idaho and Montana - west of 113°W
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (20) (null)

Transformation steps are from NAD27 to NAD83(HARN) (9) (code 8468) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (60)

EPSG:8613±1.5 m
Method:
Concatenated operation
Area of use:
USA - Nebraska
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (28) (null)

Transformation steps are from NAD27 to NAD83(HARN) (16) (code 8475) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (61)

EPSG:8614±1.5 m
Method:
Concatenated operation
Area of use:
USA - Nevada
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (48) (null)

Transformation steps are from NAD27 to NAD83(HARN) (32) (code 8511) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (62)

EPSG:8615±1.5 m
Method:
Concatenated operation
Area of use:
USA - New Jersey
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (53) (null)

Transformation steps are from NAD27 to NAD83(HARN) (37) (code 8554) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (63)

EPSG:8616±1.5 m
Method:
Concatenated operation
Area of use:
USA - New Mexico
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (30) (null)

Transformation steps are from NAD27 to NAD83(HARN) (18) (code 8477) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (64)

EPSG:8617±1.5 m
Method:
Concatenated operation
Area of use:
USA - New York
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (31) (null)

Transformation steps are from NAD27 to NAD83(HARN) (19) (code 8478) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (65)

EPSG:8618±1.5 m
Method:
Concatenated operation
Area of use:
USA - North Dakota
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (33) (null)

Transformation steps are from NAD27 to NAD83(HARN) (20) (code 8479) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (66)

EPSG:8619±1.5 m
Method:
Concatenated operation
Area of use:
USA - Ohio
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (49) (null)

Transformation steps are from NAD27 to NAD83(HARN) (33) (code 8512) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (67)

EPSG:8620±1.5 m
Method:
Concatenated operation
Area of use:
USA - Oklahoma
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (34) (null)

Transformation steps are from NAD27 to NAD83(HARN) (21) (code 8480) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (68)

EPSG:8621±1.5 m
Method:
Concatenated operation
Area of use:
USA - Oregon and Washington
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (41) (null)

Transformation steps are from NAD27 to NAD83(HARN) (27) (code 8487) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (69)

EPSG:8622±1.5 m
Method:
Concatenated operation
Area of use:
USA - South Dakota
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (36) (null)

Transformation steps are from NAD27 to NAD83(HARN) (22) (code 6739) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (70)

EPSG:8623±1.5 m
Method:
Concatenated operation
Area of use:
USA - Tennessee
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (37) (null)

Transformation steps are from NAD27 to NAD83(HARN) (23) (code 8483) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (71)

EPSG:8624±1.5 m
Method:
Concatenated operation
Area of use:
USA - Texas east of 100°W
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (38) (null)

Transformation steps are from NAD27 to NAD83(HARN) (24) (code 8484) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (72)

EPSG:8625±1.5 m
Method:
Concatenated operation
Area of use:
USA - Texas west of 100°W
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (39) (null)

Transformation steps are from NAD27 to NAD83(HARN) (25) (code 8485) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (73)

EPSG:8626±1.5 m
Method:
Concatenated operation
Area of use:
USA - Utah
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (50) (null)

Transformation steps are from NAD27 to NAD83(HARN) (34) (code 8513) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (74)

EPSG:8627±1.5 m
Method:
Concatenated operation
Area of use:
USA - Virginia
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (40) (null)

Transformation steps are from NAD27 to NAD83(HARN) (26) (code 8486) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (75)

EPSG:8628±1.5 m
Method:
Concatenated operation
Area of use:
USA - West Virginia
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (51) (null)

Transformation steps are from NAD27 to NAD83(HARN) (35) (code 8514) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (76)

EPSG:8629±1.5 m
Method:
Concatenated operation
Area of use:
USA - Wisconsin
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (42) (null)

Transformation steps are from NAD27 to NAD83(HARN) (28) (code 8488) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (77)

EPSG:8630±1.5 m
Method:
Concatenated operation
Area of use:
USA - Wyoming
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (1) (null)
  2. NAD83 to WGS 84 (44) (null)

Transformation steps are from NAD27 to NAD83(HARN) (29) (code 8489) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (33)

EPSG:1693±2 m
Method:
NTv2
Area of use:
Canada - NAD27
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Grid file: NTv2_0.gsb

Parameter file is from NAD27 to NAD83 (4) (code 1313) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.

NAD27 to WGS 84 (36)

EPSG:8585±2.5 m
Method:
Concatenated operation
Area of use:
Canada - Alberta
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
  1. NAD27 to NAD83 (4) (null)
  2. NAD83 to WGS 84 (8) (null)

Steps based on concatenated transformation NAD27 to NAD83(CSRS)v4 (3) (code 9336) assuming that NAD83(CSRS)v4 is equivalent to WGS 84.

NAD27 to WGS 84 (30)

EPSG:1530±3 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Cuba
Scope:
Medium accuracy applications.
ParameterValueUnit
X-axis translation(tx)-4.2metre
Y-axis translation(ty)135.4metre
Z-axis translation(tz)181.9metre

NAD27 to WGS 84 (78)

EPSG:8647±3 m
Method:
Concatenated operation
Area of use:
Canada - Atlantic offshore
Scope:
Oil and gas exploration and production.
  1. NAD27 to NAD83 (4) (null)
  2. NAD83 to NAD83(CSRS) (4) (null)
  3. NAD83(CSRS) to WGS 84 (2) (null)

NAD27 to WGS 84 (87)

EPSG:15699±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Mexico - offshore GoM - Campeche area S
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-2metre
Y-axis translation(ty)124.7metre
Z-axis translation(tz)196metre

Developed by John E Chance and Associates at 19°44'N, 92°21'W. Geoid height used =-13.34m.

NAD27 to WGS 84 (79)

EPSG:15851±5 m
Method:
NADCON
Area of use:
USA - CONUS including EEZ
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Grid files: conus.lasconus.los

Parameter files are from NAD27 to NAD83 (1) (code 1241) assuming that NAD83 is equivalent to WGS 84 within the accuracy of this tfm. Uses NADCON method which expects longitudes positive west; EPSG CRS codes 4267 and 4326 have longitudes positive east.

NAD27 to WGS 84 (80)

EPSG:15852±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - GoM - east of 87.25°W
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-3metre
Y-axis translation(ty)154metre
Z-axis translation(tz)177metre

Developed by John E Chance and Associates. Replaced by NAD27 to WGS 84 (79) (tfm code 15851).

NAD27 to WGS 84 (81)

EPSG:15853±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - GoM - 95°W to 87.25°W
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-7metre
Y-axis translation(ty)151metre
Z-axis translation(tz)175metre

Developed by John E Chance and Associates. Replaced by NAD27 to WGS 84 (79) (tfm code 15851).

NAD27 to WGS 84 (82)

EPSG:15854±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - GoM - west of 95°W
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-7metre
Y-axis translation(ty)151metre
Z-axis translation(tz)178metre

Developed by John E Chance and Associates. Replaced by NAD27 to WGS 84 (79) (tfm code 15851).

NAD27 to WGS 84 (83)

EPSG:15855±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Mexico - offshore GoM - Tampico area
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-8metre
Y-axis translation(ty)125metre
Z-axis translation(tz)190metre

Developed by John E Chance and Associates at 21°55'N, 97°20'W. Geoid height used =-17m.

NAD27 to WGS 84 (85)

EPSG:15864±5 m
Method:
NADCON
Area of use:
USA - Alaska including EEZ
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Grid files: alaska.lasalaska.los

Parameter files are from NAD27 to NAD83 (2) (code 1243) assuming that NAD83 is equivalent to WGS 84 within the accuracy of this tfm. Uses NADCON method which expects longitudes positive west; EPSG CRS codes 4267 and 4326 have longitudes positive east.

NAD27 to WGS 84 (86)

EPSG:15913±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Mexico - offshore GoM - Campeche area N
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)0metre
Y-axis translation(ty)125metre
Z-axis translation(tz)196metre

Developed by John E Chance and Associates at 21°33'N, 92°33'W. Geoid height used =-16.7m.

NAD27 to WGS 84 (6)

EPSG:1175±7 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - CONUS west of Mississippi River - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-8metre
Y-axis translation(ty)159metre
Z-axis translation(tz)175metre

Derived at 276 stations. Accuracy 5m, 3m and 3m in X, Y and Z axes.

NAD27 to WGS 84 (8)

EPSG:1177±8 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Bahamas - main islands onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-4metre
Y-axis translation(ty)154metre
Z-axis translation(tz)178metre

Derived at 11 stations. Accuracy 5m, 3m and 5m in X, Y and Z axes.

NAD27 to WGS 84 (13)

EPSG:1182±8 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Canada - NWT; Nunavut; Saskatchewan
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)4metre
Y-axis translation(ty)159metre
Z-axis translation(tz)188metre

Derived at 17 stations. Accuracy 5m, 5m and 3m in X, Y and Z axes.

NAD27 to WGS 84 (84)

EPSG:15856±8 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - GoM OCS
Scope:
Oil and gas exploration and production.
ParameterValueUnit
X-axis translation(tx)-7metre
Y-axis translation(ty)158metre
Z-axis translation(tz)172metre

Developed by EnSoCo Inc. Replaced by NAD27 to WGS 84 (79) (tfm code 15851).

NAD27 to WGS 84 (12)

EPSG:1181±9 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Canada - eastern provinces
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-22metre
Y-axis translation(ty)160metre
Z-axis translation(tz)190metre

Derived at 37 stations. Accuracy 6m, 6m and 3m in X, Y and Z axes.

NAD27 to WGS 84 (2)

EPSG:1171±10 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Central America - Belize to Costa Rica
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)0metre
Y-axis translation(ty)125metre
Z-axis translation(tz)194metre

Derived at 19 stations. Accuracy 8m, 3m and 5m in X, Y and Z axes.

NAD27 to WGS 84 (4)

EPSG:1173±10 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - CONUS - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-8metre
Y-axis translation(ty)160metre
Z-axis translation(tz)176metre

Derived at 405 stations. Accuracy 5m, 5m and 6m in X, Y and Z axes.

NAD27 to WGS 84 (14)

EPSG:1183±10 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Canada - Yukon
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-7metre
Y-axis translation(ty)139metre
Z-axis translation(tz)181metre

Derived at 8 stations. Accuracy 5m, 8m and 3m in X, Y and Z axes.

NAD27 to WGS 84 (5)

EPSG:1174±11 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - CONUS east of Mississippi River - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-9metre
Y-axis translation(ty)161metre
Z-axis translation(tz)179metre

Derived at 129 stations. Accuracy 5m, 5m and 8m in X, Y and Z axes.

NAD27 to WGS 84 (7)

EPSG:1176±12 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - Alaska mainland
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-5metre
Y-axis translation(ty)135metre
Z-axis translation(tz)172metre

Derived at 47 stations. Accuracy 5m, 9m and 5m in X, Y and Z axes.

NAD27 to WGS 84 (11)

EPSG:1180±12 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Canada - Manitoba and Ontario
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-9metre
Y-axis translation(ty)157metre
Z-axis translation(tz)184metre

Derived at 25 stations. Accuracy 9m, 5m and 5m in X, Y and Z axes.

NAD27 to WGS 84 (18)

EPSG:1187±12 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Mexico - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-12metre
Y-axis translation(ty)130metre
Z-axis translation(tz)190metre

Derived at 22 stations. Accuracy 25m in each axis.

NAD27 to WGS 84 (10)

EPSG:1179±13 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Canada - Alberta and British Columbia
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-7metre
Y-axis translation(ty)162metre
Z-axis translation(tz)188metre

Derived at 25 stations. Accuracy 8m, 8m and 6m in X, Y and Z axes.

NAD27 to WGS 84 (21)

EPSG:1249±15 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - Alaska - Aleutian Islands east of 180°E
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-2metre
Y-axis translation(ty)152metre
Z-axis translation(tz)149metre

Derived at 6 stations. Accuracy 6m, 8m and 10m in X, Y and Z axes.

NAD27 to WGS 84 (1)

EPSG:1170±16 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Caribbean - central (DMA tfm)
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-3metre
Y-axis translation(ty)142metre
Z-axis translation(tz)183metre

Derived at 15 stations. Accuracy 3m, 9m and 12m in X, Y and Z axes.

NAD27 to WGS 84 (22)

EPSG:1250±18 m
Method:
Geocentric translations (geog2D domain)
Area of use:
USA - Alaska - Aleutian Islands west of 180°W
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)2metre
Y-axis translation(ty)204metre
Z-axis translation(tz)105metre

Derived at 5 stations. Accuracy 10m in each axis.

NAD27 to WGS 84 (3)

EPSG:1172±20 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Canada - NAD27
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-10metre
Y-axis translation(ty)158metre
Z-axis translation(tz)187metre

Derived at 112 stations. Accuracy 15m, 11m and 6m in X, Y and Z axes.

NAD27 to WGS 84 (15)

EPSG:1184±35 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Panama - Canal Zone
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)0metre
Y-axis translation(ty)125metre
Z-axis translation(tz)201metre

Derived at 3 stations. Accuracy 20m in each axis.

NAD27 to WGS 84 (9)

EPSG:1178±44 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Bahamas (San Salvador Island) - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)1metre
Y-axis translation(ty)140metre
Z-axis translation(tz)165metre

Derived at 1 station. Accuracy 25m in each axis.

NAD27 to WGS 84 (16)

EPSG:1185±44 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Cuba - onshore
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-9metre
Y-axis translation(ty)152metre
Z-axis translation(tz)178metre

Derived at 1 station. Accuracy 25m in each axis.

NAD27 to WGS 84 (17)

EPSG:1186±44 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Greenland - Hayes Peninsula
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)11metre
Y-axis translation(ty)114metre
Z-axis translation(tz)195metre

Derived at 2 stations. Accuracy 25m in each axis. Note: NAD27 is not used in Greenland.

Convert EPSG:4267 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4267", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4267 — NAD27

geographic system using latitude and longitude on an ellipsoid · Area of use: North America - NAD27

+proj=longlat +datum=NAD27 +no_defs +type=crs
More about EPSG:4267 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs
More about EPSG:4326 →

Frequently asked questions

Why is the conversion accurate to only a few metres?
Browser tools use a single-grid Helmert seven-parameter fit, which gives 1-5 m accuracy across CONUS. The NADCON grid-shift transformation gives sub-metre accuracy but needs a binary grid file too large for typical web delivery.
Should I keep my data in NAD27?
No — for any new analytical work convert to NAD83 or WGS 84. Retain the NAD27 original only as the source-of-truth reference.
How accurate is converting NAD27 to WGS 84?
The most accurate official EPSG transformation between these systems is accurate to about ±1 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) in a desktop GIS.
Does my data leave the browser when I use this converter?
No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.
Need the reverse? Convert EPSG:4326 to EPSG:4267 →