Magnetic Declination Calculator
Declination correction from location and date.
Inputs
Results
Magnetic declination (°)
175.45
True bearing (°)175.45
Magnetic bearing from true (°)184.55
Secular variation (°/yr)-0.05
Magnetic inclination (°)59.21
Grid convergence (°)-3.86
Pole Lat Rad1.51
How to Use This Calculator
- Enter your geographic Latitude (°N) and Longitude (°E) — negative values for south latitude and west longitude.
- The calculator returns Magnetic declination (°): positive means magnetic north is east of true north, negative means west.
- Enter a Magnetic bearing (°) from your compass to get the corrected True bearing automatically.
- Adjust Years from 2025 to account for secular variation when using older maps or planning future expeditions.
- Use the Magnetic inclination (°) output to understand how steeply the field dips at your location.
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