USNG → WGS 84

USNG to latitude and longitude converter

Convert USNG references to latitude and longitude individually or in batches, with accepted formats, WGS 84 datum and cell-centre notes.

Batch coordinate converter

Enter one complete USNG reference per line.

This reference identifies a cell; conversion uses its centre. This converter uses WGS 84; NAD83-based tools may differ at metre precision.

Input example: 15S WC 80817 51205

0 of 100 references

Results use: latitude, longitude order.

Output example: 38.405426, -92.074395

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 complete United States National Grid references interpreted on WGS 84 to latitude and longitude.

Frequently asked questions

What input is accepted?

Enter the complete zone, latitude band, 100 km square and equal-length easting/northing digit groups. Spaces are optional.

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 cell.

Which axes and units are used?

USNG input encodes a metre-based grid cell as text. WGS 84 output defaults to latitude then longitude in degrees.

How are precision and datum handled?

The converter returns the source cell's centre as its representative point. It uses WGS 84; NAD83-based tools can differ near metre-level cell boundaries.

Where can I use this coordinate system?

USNG input must be valid within the supported UTM-style grid coverage. Polar UPS-style references are not supported by this converter.

What should I check?

  • Include the zone, latitude band and 100 km square letters.
  • Use easting and northing digit groups of equal length.
  • Treat the result as the cell centre and account for the WGS 84 datum when comparing tools.

Which datum does this USNG converter use?

WGS 84. A NAD83 implementation can differ at metre-level cell boundaries.

Which point is returned for a USNG cell?

The conversion uses the cell centre as the representative point.