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Magnetic north
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Source:
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Controls
Not started
Smoothing
20%
Higher smoothing feels more responsive; lower smoothing is more stable.
True north info
Disabled
Declination
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Location
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True north = magnetic north + declination (estimated using a geomagnetic model; accuracy depends on your device magnetometer and environment).
This page is not in a secure context. The browser may block sensors or geolocation. Use HTTPS or localhost.
How to Use
- Click "Start compass" to request device orientation permissions (required on iOS).
- Once allowed, the compass displays your current heading (Magnetic North by default).
- Click "Enable true north" to request location access and calculate magnetic declination.
- If the needle is jittery, adjust the "Smoothing" slider or calibrate by moving your device in a figure-8 motion.
Tips & FAQ
- iOS users must manually start the compass and allow "Motion & Orientation" access.
- "True North" requires GPS location to calculate declination; if denied, it falls back to Magnetic North.
- This tool requires a secure context (HTTPS or localhost) to access sensors.
- Keep away from magnetic interference (magnets, speakers) for accurate readings.
