Convert Kalianpur 1975 to WGS 84

Convert coordinates from Kalianpur 1975 (EPSG:4146) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4146-to-epsg-4326

Official EPSG transformation from Kalianpur 1975 to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between Kalianpur 1975 (EPSG:4146) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

Kalianpur 1975 to WGS 84 (1)

EPSG:1156±22 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Asia - India mainland and Nepal
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	295	metre
Y-axis translation(ty)	736	metre
Z-axis translation(tz)	257	metre

Derived at 7 stations. Accuracy 12m, 10m and 15m in X, Y and Z axes. Care! DMA ellipsoid is inconsistent with EPSG ellipsoid - transformation parameter values may not be appropriate. Also source CRS may not apply to Nepal.

Convert EPSG:4146 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4146", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4146 — Kalianpur 1975

geographic system using latitude and longitude on an ellipsoid · Area of use: India - mainland

+proj=longlat +a=6377299.151 +rf=300.8017255 +towgs84=295,736,257,0,0,0,0 +no_defs +type=crs

More about EPSG:4146 →

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

How accurate is converting Kalianpur 1975 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±22 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation 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:4146 →