WGS 84 → USNG

Latitude and longitude to USNG converter

Convert latitude and longitude to USNG individually or in batches. Choose grid precision and see WGS 84 coverage and coordinate-order options.

Batch coordinate converter

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

Input example: 38.405426, -92.074395

0 of 100 coordinates

The result identifies a WGS 84 grid cell; NAD83-based tools may differ at metre precision.

Output example: 15S WC 80817 51205

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 a United States National Grid text reference with readable component spacing.

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 from −90 to 90 and longitude from −180 to 180.

What output will I receive?

Choose precision 0–5 digits per axis. The result identifies a grid cell and is formatted with readable USNG component spacing.

Which axes and units are used?

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

How are precision and datum handled?

Select 0–5 digits per axis for cells from 100 km down to 1 m. This converter uses WGS 84; NAD83-based tools can differ near metre-level cell boundaries.

Where can I use this coordinate system?

USNG output uses the supported UTM-style grid from 80° south through 84° north. Polar UPS-style references are not supported by this converter.

What should I check?

  • Use input positions within the supported UTM-style coverage.
  • Choose output precision that matches the intended grid-cell size.
  • Account for the datum when comparing the result with a NAD83-based tool.

Which datum does this USNG converter use?

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

What does the selected USNG precision control?

It controls the output grid-cell size, from 100 km at precision 0 to 1 m at precision 5.