UTM Zone Finder from Coordinates
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserhard
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter a latitude and longitude.
- Press Convert.
- Read the UTM zone, band letter and central meridian.
How it works
Works out the UTM zone from the longitude (zone = ⌊(longitude + 180) ÷ 6⌋ + 1) and the latitude band letter from the latitude.
Worked example
Perth. −31.95, 115.86 → zone 50, central meridian 117°, southern hemisphere.
Frequently asked questions
How wide is a UTM zone?
6° of longitude. There are 60 zones around the globe.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.