ToolnozaGeographic versus projected coordinates
Latitude and longitude describe positions on the Earth in angular degrees. UTM uses a projected grid with eastings and northings expressed in metres. A coordinate is not complete without its reference system: WGS84 is a datum, while UTM also needs a zone and hemisphere.
How UTM zones work
Most of the world is divided into 6-degree longitude bands. Zone selection is based on longitude, with known regional exceptions. Standard UTM covers approximately 80° south to 84° north. The Toolnoza calculator uses a standard zone-band approach and explicitly does not apply special regional exceptions.
Convert a point
- Confirm that your coordinates are WGS84 and use signed decimal degrees: north/east positive, south/west negative.
- Choose latitude/longitude to UTM and enter both values.
- Record the returned zone, hemisphere, easting and northing together.
- For reverse conversion, provide the original zone and hemisphere, not only two metre values.
- Compare the result on a map and verify the datum before survey, engineering or field use.
Example and engineering caution
The Toolnoza example uses approximately 31.6300° N, 7.9900° W for a location near Marrakech; the converter reports a WGS84 UTM grid coordinate. Results from local survey systems or other datums may differ materially even when numbers appear close. Do not use an online conversion as the sole field-survey validation.
Frequently asked questions
Is UTM 29N interchangeable with UTM 30N? No. They are different projection zones.
Why do I need the hemisphere? UTM northing conventions differ by hemisphere.
Can I convert an old local datum simply by relabeling it WGS84? No; a real datum transformation is needed.