About this conversion
Convert Web Mercator (EPSG:3857) projected coordinates from a web map to WGS 84 latitude and longitude.
Frequently asked questions
What input is accepted?
Enter Web Mercator x followed by y in projected metres. Supported x values are approximately −20,037,508.34 to 20,037,508.34 and y values are approximately −20,048,966.10 to 20,048,966.10.
What output will I receive?
By default, results show WGS 84 latitude first and longitude second in decimal degrees. Select Reverse coordinate order to show longitude first. Displayed decimal places do not add accuracy to the source.
Which axes and units are used?
Web Mercator input uses x then y in projected metre units. WGS 84 output defaults to latitude then longitude in degrees.
How are precision and datum handled?
Web Mercator increasingly distorts scale and area towards its latitude limit. Its metre units must not be assumed to equal ground metres everywhere.
Where can I use this coordinate system?
Latitude is limited to approximately 85.05112878° north or south; the poles cannot be represented.
What should I check?
- Enter x before y and keep both within the supported Web Mercator range.
- Treat projected metre units as map coordinates rather than undistorted ground distances.
- Remember that Web Mercator cannot represent either pole.
Why does Web Mercator stop before the poles?
The projection tends to infinity at 90°, so web maps use a finite latitude cutoff.
Are EPSG:3857 units true metres?
They are projected metre units, but ground scale varies with latitude.