NOAA Logo, NOAA Satellites and Information, National Geophysical Data Center (NGDC).

Geomag top navigation banner
NOAA > NESDIS > NGDC > Geomagnetism
comments |  privacy policy
Links to related web resources go to NOAA's Space Weather prediction Center Now DoD World Magnetic Model Home Links and descriptions of magnetic field models and software go to the Geomagnetic Data Home go to all data and information Answers to Frequently Asked Questions Go to the Space Physics Interactive Data Resource Geomagnetic Data online at NGDC

Estimated Value of Magnetic Declination

To compute the magnetic declination, you must enter the location and date of interest.

Checkout our new online calculators!
This calculator will be phased out May 2012.

If you are unsure about your city's latitude and longitude, look it up online! In the USA try entering your zip code in the box below or visit the U.S. Gazetteer. Outside the USA try the Getty Thesaurus.
Search for a place in the USA by Zip Code:

???en_US.error.illegal_value??????en_US.error.illegal_value??????en_US.error.out_of_range??????en_US.error.illegal_value??????en_US.error.illegal_value??????en_US.error.out_of_range???

Enter Location: (latitude 90S to 90N, longitude 180W to 180E). See Instructions for details.

Latitude: N S Longitude: E W

Enter Date (1900-2015): Year: Month (1-12): Day (1-31):

For more information, visit:
Answers to some frequently asked questions | Instructions for use | Today's Space Weather