Zerdly

UTM Zone Finder from Coordinates

Finds the UTM zone, band and central meridian for a latitude and longitude.

100% FreeRuns in your browserProfessional
How to use this calculator

Inputs

UTM zone, hemisphere, latitude band and central meridian for a latitude/longitude — special zones included, each in its own field.

Decimal degrees (−31.95), DMS (31 57 0 S) or DDM (31° 57.0′ S).

Decimal degrees (115.86), DMS (115 51 36 E) or DDM (115° 51.6′ E).

More options

Leave blank for the standard zone. A forced zone is marked non-standard.

Enter the values and press Calculate.

Or load an example to see a worked result.

Your zone, central meridian and band
Schematic
Your zone, central meridian and bandA strip of seven neighbouring UTM zones with the found zone highlighted and its central meridian dashed, and below it the latitude-band ladder with the found band highlighted.47484950515253Central meridianCDEFGHJKLMNPQRSTUVWX← South (bands C–M)North (N–X) →Equator
Six-degree zones numbered eastward from 180°W; bands C–X are 8° of latitude (X is 12°). Zone, hemisphere and band are separate fields.

Batch from CSV

One row per calculation, with a header row. Values use the units currently selected in the form above. Up to 10,000 rows; nothing is uploaded.

How the method works

A fixed worked example to explain the method — it is not your result.

Zone, latitude band and hemisphere are separate fields (Perth example)
Illustrative method
Zone, latitude band and hemisphere are separate fields (Perth example)A strip of seven neighbouring UTM zones with the found zone highlighted and its central meridian dashed, and below it the latitude-band ladder with the found band highlighted.47484950515253CM 117°CDEFGHJKLMNPQRSTUVWX← South (bands C–M)North (N–X) →Equator
Zone 50 (central meridian 117°), hemisphere S, latitude band J. The point is 1.14° west of the central meridian.

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

  1. Enter a latitude and longitude in decimal degrees, DMS or DDM.
  2. Optionally force a zone to preview a neighbouring one; it is marked non-standard.
  3. Press Calculate. Read the zone, hemisphere and latitude band as three separate fields, plus the central meridian and the EPSG codes that exist for it.

How it works

Ordinary zones are 6° wide: zone = ⌊(longitude + 180) ÷ 6⌋ + 1, with +180° in zone 60 and −180° in zone 1.

Two exceptions apply. Norway: 56°–64°N between 3° and 12°E is zone 32. Svalbard: between 72° and 84°N only zones 31 (0°–9°E), 33 (9°–21°E), 35 (21°–33°E) and 37 (33°–42°E) exist.

Latitude bands run C to X in 8° steps from 80°S, skipping I and O; X covers 72°–84°N. Beyond 84°N or 80°S UTM does not apply — use UPS.

Hemisphere and band are different things: '50S' can mean zone 50 southern hemisphere or zone 50 band S, which is in the northern hemisphere. Keep them in separate columns.

Worked example

Perth: −31.95°, 115.86°. Zone 50, hemisphere S, band J, central meridian 117° (1.14° west of it). EPSG:32750 (WGS 84 / UTM 50S) and EPSG:7850 (GDA2020 / MGA 50) both use this zone.

Common mistakes

  • Writing the band letter after the zone and having it read as the hemisphere.
  • Ignoring the Norway and Svalbard exceptions — near Bergen the zone is 32, not 31.
  • Assuming the zone fixes the datum. WGS84 and GDA2020 coordinates in the same zone already differ by tens of centimetres, and the gap grows by about 7 cm a year as the Australian plate moves.

Frequently asked questions

How wide is a UTM zone?

6° of longitude. There are 60 zones around the globe.

Related tools

Explore more in Surveying, Coordinates, GIS & CAD.

Cite this tool

Zerdly. (2026). UTM Zone Finder from Coordinates. Retrieved from https://www.zerdly.com/tools/utm-zone-finder-from-coordinates/

Tip: Enter any known values to calculate the remaining results.

Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.