WGS 84 → Web Mercator

Latitude and longitude to Web Mercator converter

Convert latitude and longitude to Web Mercator x and y individually or in batches, with projection limits, distortion and coordinate-order notes.

Batch coordinate converter

Enter one WGS 84 coordinate per line as latitude, longitude.

Input example: 51.5072, -0.1276

0 of 100 coordinates

Output example: -14204.367, 6711506.705

Numeric coordinates are rounded for display: decimal latitude/longitude to up to 6 decimal places, metre-based coordinates to up to 3, DMS seconds to up to 2, and DDM minutes to up to 4.

About this conversion

Convert WGS 84 latitude and longitude to Web Mercator (EPSG:3857), the projected coordinate system used for most interactive web maps.

Frequently asked questions

What input is accepted?

By default, enter WGS 84 latitude first and longitude second in decimal degrees. Select Reverse coordinate order to enter longitude first. Latitude must be within approximately 85.05112878° north or south and longitude from −180 to 180.

What output will I receive?

The result is EPSG:3857 x and y. These values are useful for web-map rendering, not direct ground-distance measurement at all latitudes.

Which axes and units are used?

WGS 84 input defaults to latitude then longitude in degrees. Web Mercator output uses x then y in projected metre units.

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?

  • Use latitude within approximately 85.05112878° north or south.
  • Treat the projected metre units as map coordinates rather than undistorted ground distances.
  • Read Web Mercator output as x followed by y.

In which order is Web Mercator output shown?

The result shows x first and y second, both in projected metre units.

Are Web Mercator units true ground metres?

They are projected metre units, but ground scale varies with latitude.