Magnetic Declination Calculator

This calculator helps you determine the magnetic declination at a specific location on Earth. It is essential for navigators and scientists working with maps and compasses.

Source of Data and Methodology

Data is sourced from the National Centers for Environmental Information (NCEI), based on the World Magnetic Model (WMM). All calculations are rigorously based on the formulas and data provided by this source.

The Formula Explained

Magnetic Declination = f(Latitude, Longitude, Date)

Glossary of Variables

Latitude: The north-south position on the Earth's surface.
Longitude: The east-west position on the Earth's surface.

FAQs

What is magnetic declination?

Magnetic declination is the angle between magnetic north and true north.

How accurate is this calculator?

The calculator uses the latest data from the World Magnetic Model, ensuring high accuracy for most applications.

Tool developed by Ugo Candido. Last reviewed for accuracy on October 2023.