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Convert EPSG:7405 to EPSG:4322

Online coordinate converter from OSGB36 / British National Grid + ODN height (EPSG:7405) to WGS 72 (EPSG:4322). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.

Direct link to this transformation: epsgtransform.com/transform/epsg-7405-to-epsg-4322

Convert EPSG:7405 to EPSG:4322 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:7405", "EPSG:4322", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:7405 — OSGB36 / British National Grid + ODN height

compound horizontal + vertical reference system · Area of use: UK - Great Britain mainland onshore

+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +units=m +geoidgrids=uk_os_OSGM15_GB.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crs
More about EPSG:7405 →

Target: EPSG:4322 — WGS 72

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

+proj=longlat +ellps=WGS72 +no_defs +type=crs
More about EPSG:4322 →

Frequently asked questions

How accurate is converting OSGB36 / British National Grid + ODN height to WGS 72?
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:4322 to EPSG:7405 →