Ham Radio Grid Squares and Locator Tools

Find resources for Maidenhead grid square calculations, maps, and locator databases for amateur radio operations.

Austin
Reviewed by • Digital Modes & Software Editor March 2026

Grid squares, also known as Maidenhead locators, are a fundamental part of amateur radio activity, especially for VHF/UHF operators and contesters. These alphanumeric codes precisely define geographic locations, allowing hams to quickly exchange position information during QSOs and track DX progress. Understanding and using grid squares is essential for many awards and competitive events, providing a standardized way to measure distance and demonstrate operating prowess across different bands.

Operators frequently use online tools and software to convert between geographic coordinates and grid squares, or to find their own locator based on GPS data. This category provides various grid square locator maps, including regional and world maps, useful for planning antenna projects or visualizing QSO coverage. You will also find callsign lookup tools that display a station's grid square, along with applications like WorkedGrids that help track and display contacted grid squares from your logging program.

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