Maidenhead Grid Locator Converter
Converts between amateur-radio Maidenhead grid locators and latitude and longitude.
Maidenhead Grid Locator
Result
Enter a value and press Convert.
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Choose encode (lat/long → locator) or decode (locator → lat/long).
- Enter coordinates, or a 4- or 6-character grid locator.
- Press Convert.
How it works
Maidenhead grid locators (used in amateur radio) encode a position as letters and digits — a 6-character locator pins it to a small 'subsquare'.
Decoding returns the centre of the square.
Worked example
Paris area. 48.8566, 2.3522 encodes to JN18eu.
Frequently asked questions
What is a Maidenhead locator used for?
Amateur (ham) radio operators use it to share location and calculate distance/bearing between stations.
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Cite this tool
Zerdly. (2026). Maidenhead Grid Locator Converter. Retrieved from https://www.zerdly.com/tools/maidenhead-locator-ham-radio-grid-converter/
Tip: Enter any known values to calculate the remaining results.
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