Grid Square Conversion
(and distance calculation) by DK3VN

Last Update: 11-June-2005

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You can determine the Maidenhead Grid Square Locator at your QTH. First of all you have to find out the position of your QTH on a good map: Latitude North/South, and Longitude West/East. Also you can convert a Locator to Latitude and Longitude.

To calculate the distance between two locators go to the bottom of this page.

Use this form, if you know the Latitude and Longitude in Degrees and fractions of a Degree.
  Latitude Deg N S       Locator
Longitude Deg W E
Use this form, if you know the Latitude and Longitude in Degrees, Minutes and fractional Minutes.
  Latitude Deg Min N S       Locator
Longitude Deg Min W E
Use this form, if you know the Latitude and Longitude in Degrees, Minutes and Seconds.
  Latitude Deg Min Sec N S       Locator
Longitude Deg Min Sec W E
Use this form to calculate the distance between two locators. Enter the source and the destination locator or select a DX or call area as source or as destination. This calculation is based on the assumption the earth is a perfect sphere with a radius of 6378.16 km.
Source
  Src Loc     Distance km   Heading < Src to Dest Deg
Dest Loc Dest to Src
Destination
A small part of the code is from Stefan, DC8SB. I have the code conciderably modified and expanded.
© 2005 Waldemar Kebsch, DK3VN