Convert EPSG:21251 to EPSG:4326

Online coordinate converter from GSK-2011 / GSK 3GK zone 51 (EPSG:21251) to WGS 84 (EPSG:4326). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.

From

Input (x, y)

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-21251-to-epsg-4326

Convert EPSG:21251 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:21251", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:21251 — GSK-2011 / GSK 3GK zone 51

projected system measured in linear units (typically metres) · Area of use: Russia - 151.5°E to 154.5°E onshore

+proj=tmerc +lat_0=0 +lon_0=153 +k=1 +x_0=51250000 +y_0=0 +ellps=GSK2011 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs

More about EPSG:21251 →

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 GSK-2011 / GSK 3GK zone 51 to WGS 84?: Projection-only conversions are accurate to floating-point precision. If a datum shift is involved, browser-based tools use Helmert parameters which are accurate to roughly 1-5 m; for surveying-grade work apply the official grid-shift 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:21251 →