I want to convert a coords interval (especially latitude) to real distance.

I mean let's say we stay at the exact same longitude, but with 1 degree of difference in latitude.

How many kilometers/meters/whatever does this 1-dimensional bounding box amount to?

Is there some type to do the conversion?

  • 2
    Yes, the conversion is called projection. You need to know the lat/long datum and desired projection. Not for all coordinates the output is similar. Check this question
    – aldo_tapia
    Sep 28, 2017 at 11:01
  • 2
    You can do this calculation for a given pair of points, but since the Earth is modeled with an oblate spheroid, the values will change slightly at different latitudes, and the difference is huge along parallels. Research the "two problems of geodesy" for more details.
    – Vince
    Sep 28, 2017 at 11:45

1 Answer 1


I will atempt to answer your questions in three different ways:

  1. A degree of latitude is approximately 111 km. It varies from 110.567 km at the equator to 111.699 km at the poles. Taken from here.

  2. You can calcutale it yourself online here at NOAA.

  3. This previous answers undertakes the background of the calculations you are asking for http://gis.stackexchange.com/questions/75528/understanding-terms-in-length-of-degree-formula/75535#75535


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