Learn what declination is and how to adjust your compass for accurate navigation. Understand east vs west declination, map readings, and the science behind magnetic north.

Declination results are typically accurate to 30 minutes of arc, but environmental factors can cause magnetic field disturbances. The calculator provides an easy way for you to get results in HTML, …

Profile parameters: Height,km [ 0 - 40000] Latitude, deg. [ (20 - 90) or (-90 - -20)] Longitude, deg. [0 - 360] Year [1900-2030] Start Stop Stepsize Note: Number of points in profile should not exceed 50 (N …

Dec 10, 2025 · In our in-depth guide, we’ll share with you all the basics about what compass declination means, how to determine its value and how to properly adjust your compass, as well as the …

Jul 16, 2016 · An explanation of declination and the magnetic compass, and how to adjust for declination and orient a map. Includes an accompanying video.

A floating card compass always gives bearings in relation to magnetic north and cannot be adjusted for declination. True north must be computed by adding or subtracting local magnetic declination.

Magnetic declination (variation) calculator based on the IGRF magnetic field model. Estimates magnetic delination world-wide from 1900 - present.

Here we propose to utilize another approach in defining MLT for the CGM coordinate system. Let us assume that the station is located at local midnight, i.e., at some UT instance the local geographic …

Use the tool below to compute values for the geomagnetic field and secular variation for a given set of coordinates and date. This calculator uses the World Magnetic Model as released in Dec 2024.

Free browser-based magnetic declination calculator. Compute the 2026 angle between True North and Magnetic North for any latitude and longitude using the World Magnetic Model (WMM-2025). Works …