Convert S-JTSK [JTSK03] to WGS 84

Convert coordinates from S-JTSK [JTSK03] (EPSG:8351) 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-8351-to-epsg-4326

Official EPSG transformation from S-JTSK [JTSK03] to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between S-JTSK [JTSK03] (EPSG:8351) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

S-JTSK [JTSK03] to WGS 84 (1)

EPSG:8368±1 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Slovakia
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.

Parameter	Value	Unit
X-axis translation(tx)	485.021	metre
Y-axis translation(ty)	169.465	metre
Z-axis translation(tz)	483.839	metre
X-axis rotation(rx)	-7.786342	arc-second
Y-axis rotation(ry)	-4.397554	arc-second
Z-axis rotation(rz)	-4.102655	arc-second
Scale difference(ds)	0	parts per million

Parameter values taken from S-JTSK [JTSK03] to ETRS89 (1) (code 8367) assuming that ETRS89 (ETRF2000 realization) is coincident with WGS 84 within the accuracy of the transformation. Within the 1m accuracy of this transformation, it is reversible.

Convert EPSG:8351 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:8351", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:8351 — S-JTSK [JTSK03]

geographic system using latitude and longitude on an ellipsoid · Area of use: Slovakia

+proj=longlat +ellps=bessel +towgs84=485.021,169.465,483.839,7.786342,4.397554,4.102655,0 +no_defs +type=crs

More about EPSG:8351 →

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 S-JTSK [JTSK03] 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 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:8351 →