Convert Web Mercator to Lat/Long

Revert EPSG:3857 (Web Mercator) meters back to GPS-ready Latitude and Longitude.

How to Use

Enter X and Y coordinates in meters.

Online Tool

Input: EPSG:3857

Output: WGS84

X (Meters): Y (Meters):

What this result means for your project:

Calculated at 6 decimal places (0.11m precision). WGS84 geodetic model applied. Result requires epoch verification for tectonic drift.

Datum Hazard: Read Before Conversion

Coordinate values only have meaning when attached to a Datum.

WGS84: Standard for GPS, Google Maps, Web Mercator.
NAD27: Used in older USGS topographic maps (pre-1983).

Using the wrong datum can shift your position by 20-100+ meters. Always verify the source datum of your coordinates.

Use Cases

Debugging map tile coordinates.
Extracting location data from map databases.

FAQ

Q: Is this WGS84?

A: Yes, the output is WGS84 Latitude/Longitude.

Q: What are the units?

A: Input must be in meters.

Q: Why is the latitude limit 85 degrees?

A: Because Web Mercator math fails at 90 degrees (infinity).

Professional Verification Disclaimer

This content is provided for decision-support and educational purposes for geospatial professionals and does not constitute legal, surveying, or engineering advice. Regulations and official standards vary by jurisdiction and project scope. Information is based on publicly available standards as of January 11, 2026. For critical projects, always verify current requirements with:

Licensed Professional Surveyors or Professional Engineers (PE) in the relevant jurisdiction
Certified attorneys for legal interpretation of regulations
Current guidelines from relevant authorities (FAA, JCAB, GSI, etc.)

Reference: Professional Use & Scope

Related Coordinate Conversion Tools

US State Plane (SPCS) Converters & Local Guides

Professional engineering and surveying transformations from state-specific conformal grids to GPS WGS84.

Related Tools & Resources

Explore our full suite of coordinate transformation and compliance tools:

GIS Tools Hub Universal Sandbox (EPSG Explorer) LatLong —UTM Datum Compliance Engine

Certified Geodetic Insight

Verified against professional geodetic standards

The $50,000 Geodetic Drift Liability: NAD83 vs WGS84

Because the North American Plate moves ~2cm/year, NAD83(2011) and WGS84(G1762) currently diverge by over 2.2 meters. Using a "standard" GPS WGS84 coordinate for a high-precision NAD83 cadastral staking has triggered $50,000 Professional Liability claims for foundational rework and utility misplacement.

Risk Exposure Metric: 2.2-Meter Tectonic Drift & Epoch Accumulation

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Warning: Verify Your Calculation

Coordinate accuracy varies by device and datum. Do not use these results for legal or construction purposes without checking:

GPS Accuracy Alert

Your phone's GPS can be off by 30 meters. This can cause critical errors in your data.

Check My Accuracy →

Datum Shift Risk

Using the wrong coordinate system (e.g. WGS84 vs NAD83) creates a permanent 1-meter offset.

Verify My Datum →