I am trying to find an exact "plug and chug" formula for calculating magnetic declination given time, date, latitude, longitude, elevation, etc. Everywhere I look tells me to use their web based calculator. I was hoping there was a way that I could figure this out myself and maybe code my own calculator.
2026-03-25 10:59:42.1774436382
Finding Magnetic Declination
60 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail At
1
I don't think an "exact plug and chug" formula exists for this problem.
A free fully documented implementation that does the job is available here:
https://www.ngdc.noaa.gov/geomag/WMM/soft.shtml
It's a substantial piece of software.
You might be able to read the code and the documentation and put together a crude approximation of your own.