Locator calculator

Need to know your IARU locator? Use this simple online utility to quickly find it by entering the National Grid Reference for your location and clicking "Calculate".
This calculator works for all locations in the United Kingdom.

NGR to IARU Locator

Enter full National Grid Reference:
A full 8-character NGR is required (e.g. SU338855).
Enter with no spaces between characters.

      IARU Locator:

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You can find the National Grid Reference for the location, correct to 100m, from a suitable Ordnance Survey map, such as the Landranger 1:50,000 series. Each map includes instructions for reading the grid reference from the map.   See also the Ordnance Survey Web site.

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Javascript NGR-to-Locator calculator
written by Neill Taylor, G4HLX.
Based on algorithms developed for
SPOT for the ZX Spectrum, 1985.
(c) 1985,1999 N.P. Taylor