EPSG:4277 — OSGB36
Geographic coordinate system · coordinates in degrees · United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland). Isle of Man onshore.
From
To (this page’s CRS)
EPSG:4277OSGB36
Coordinates in EPSG:4326 — one pair per line
Paste as many as you like: X,Y or X Y or X;Y (optional Z). Columns copied from Excel or a CSV work as-is.
0 coordinates detected
🔒 Runs entirely in your browser with GDAL WebAssembly — the same PROJ engine used by QGIS, PostGIS, and ArcGIS. Nothing is uploaded. Output units: degree.
Worked example — the centre of this system's area of use: -3.5, 55.38 (EPSG:4326 lon, lat) = -3.499, 55.38 (EPSG:4277).
EPSG:4277 details
Area of use
United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland). Isle of Man onshore.
WGS84 bounds: -9.01° to 2.01° longitude, 49.75° to 61.01° latitude.
Well-known text (WKT2)
Show WKT2 definition for EPSG:4277
GEOGCRS["OSGB36",DATUM["Ordnance Survey of Great Britain 1936",ELLIPSOID["Airy 1830",6377563.396,299.3249646,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,2],AXIS["geodetic latitude (Lat)",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["geodetic longitude (Lon)",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]],USAGE[SCOPE["Geodesy."],AREA["United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland). Isle of Man onshore."],BBOX[49.75,-9.01,61.01,2.01]],ID["EPSG",4277]]
Related coordinate systems
Working with whole files instead?
- Reproject a vector file (Shapefile, GeoJSON, KML, GeoPackage…) to EPSG:4277
- Reproject a GeoTIFF to EPSG:4277
- Batch-convert a CSV of coordinates between coordinate systems
Registry facts from the official EPSG dataset (v11.022) as distributed with PROJ. Conversions run in your browser via GDAL/PROJ WebAssembly.