Find your magnetic declination

Ever wondered what the magnetic declination (the difference between where a compass points and true north) is where you live? In the old days you had to look on a map or chart and then adjust it for the time that has passed since the chart was printed. Now you can just asked Wolfram Alpha.

If you type in:

geomagnetism Ottawa

it will tell you that the declination here is 13.68deg West.

If you put a date after the location you can also get the declination for other dates. For example the day I was born the declination in Ottawa was 16 degrees West.