About this conversion
Convert Universal Polar Stereographic eastings and northings from the north or south polar grid to WGS 84 latitude and longitude.
Frequently asked questions
What input is accepted?
Enter UPS easting then northing in metres, followed after the pipe by hemisphere=north or hemisphere=south. Hemisphere is required because the numeric grid is reused at both poles.
What output will I receive?
By default, results show WGS 84 latitude first and longitude second in decimal degrees. Select Reverse coordinate order to show longitude first. Displayed decimal places do not add accuracy to the source.
Which axes and units are used?
UPS input uses easting then northing in metres with an explicit hemisphere. WGS 84 output defaults to latitude then longitude in degrees.
How are precision and datum handled?
UPS is a projection, not a precision upgrade. At 84°N and 80°S, both UTM and UPS are valid, so use the system required by your workflow.
Where can I use this coordinate system?
UPS supports 84°N through 90°N and 80°S through 90°S, including both poles. UTM and UPS both accept the boundary parallels.
What should I check?
- Include hemisphere=north or hemisphere=south after the pipe on every input row.
- Check that easting appears before northing and both values are within the supported UPS range.
- Use numeric UPS input rather than unsupported UPS-style MGRS text.
Why must I specify the UPS hemisphere?
The north and south UPS grids reuse the same numeric ranges, so the easting and northing pair is ambiguous without a hemisphere.
Are the UTM and UPS boundary parallels supported?
Yes. Both systems accept 84°N and 80°S.