Accident Investigation Calculator

Latitude and Longitude to OS Grid

Please read the following instructions carefully.

Enter the Latitude and Longitude in the boxes below and click on the Calculate button to convert them.

You can either enter the values in Degrees, Minutes, and Seconds (e.g. Latitude 54° 41' 30", Longitude -1° 12' 46") or if you prefer, enter decimal degrees (e.g. Latitude 54.6917, Longitude -1.2129) into just the Degrees boxes and keep the Minutes and Seconds boxes empty.

If the Longitude is West (W), ensure the value entered for the Longitude is a negative value.

Latitude: ° ′ ″
Longitude: ° ′ ″

Calculate

Eastings

Northings

OS Grid Reference

Clear all values

References

The algorithm used in this calculator is described at: National GPS Reference Information

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