Magnetic Declination Calculator

Some unusual research requests have come across the transom lately.

In a land dispute, a wilderness property was referred to using map coordinates and compass bearings. I found the correct map, but I needed to know the Magnetic Declination on the date of the compass bearings. Magnetic declination is the angle between magnetic North (the direction the north end of a compass needle points) and true north (the direction along the earth’s surface towards the geographic North Pole).

The Magnetic Declination Calculator for Canada may be found at While the U.S Magnetic Declination Calculator may be found at