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Calculate magnetic declination, grid correction, and other magnetic field parameters for any location and date. Choose from different models and formats, including API and PDF.
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Calculate the angle between magnetic north and true north at any location and time using the World Magnetic Model or the International Geomagnetic Reference Field Model. Learn more about magnetic declination, compass, poles, and historical maps.
Calculate the magnetic declination angle for any location and date using NOAA data. Enter latitude, longitude, altitude and year to get the declination value in degrees.
Use this on-line calculator to estimate current and past values of the magnetic field, including declination, for any location and date. Enter your latitude and longitude, elevation, and date range, or use the zip code or city select boxes to get your location automatically.
Calculate and lookup magnetic declination for any location and date using NOAA models. Choose from WMM, IGRF, or EMM models and get results in various formats.
WMM is the standard model for navigation and heading referencing systems using the geomagnetic field. NCEI provides access to the WMM software, documentation, and online calculator for computing the main components and annual changes of the geomagnetic field.
26 maj 2024 · Find the difference between true north and magnetic north at your location using this calculator adapted from NOAA software. Learn how to use magnetic declination for navigation, orienteering, and adjusting maps.