How to check compass direction on an Android tablet

Your tablet may show a direction that jumps around, points the wrong way, or does not appear at all. On a budget Android tablet, that can mean a compass sensor is missing, the browser cannot read it, or nearby metal and magnets are interfering.

Use the Sensors Test to check whether the tablet reports compass data as you turn it. The test can show what the device makes available to the browser, but it cannot add a compass sensor that the tablet does not have.

Check the compass direction

Open the Sensors Test on the Android tablet you want to check. Use a browser that is up to date.
Set the tablet down flat on a nonmetal surface, away from speakers, magnetic cases, magnetic clasps, and other electronics. Give the reading a moment to settle.
Look for the compass reading in the test. Turn the tablet slowly through a full circle while keeping it flat. The heading should change smoothly as the tablet turns.
Turn the tablet until its top edge points toward a direction you can identify, such as north using a reliable map or a second compass. Check whether the displayed direction is reasonably close.
Repeat the test in another place, without the case if it has a magnet or metal stand. This helps separate a tablet limitation from interference around your usual spot.

Keep the tablet level for the first check. If the heading changes only when you tilt it, return it to a flat position and rotate it slowly. A compass reports direction relative to magnetic north, which can differ from true north by a varying amount depending on where you are.

What the result means

The heading changes smoothly and roughly matches your reference

The browser is receiving compass data and the sensor is responding. A small, consistent difference from a map or another compass can be normal because those references may use true north while the tablet uses magnetic north. Local magnetic interference can also create an offset.

The heading moves, but jumps or changes when you move nearby objects

The tablet is detecting a magnetic field, but nearby metal or magnets may be distorting it. Speakers, magnetic tablet covers, desk frames, and some cases can affect a compass. Repeat the check in an open area with the tablet away from those objects.

The reading is blank or does not change

The tablet may not have a magnetometer, the sensor may be unavailable to this browser, or a browser permission or compatibility limit may be blocking access. A GPS receiver can estimate location, but location alone does not provide a compass heading when the tablet is stationary.

The direction looks wrong everywhere

First rule out a magnetic cover, nearby electronics, and a poor reference. If the heading remains far off in several locations, the compass may need recalibration or the sensor may be faulty. A browser test cannot confirm which of those is the cause by itself.

How to fix an unreliable reading

Move away from magnetic objects. Take off a case with a magnetic clasp or stand. Move the tablet away from speakers, metal furniture, and other devices, then test again on a wooden or plastic surface.
Rotate the tablet slowly. Hold it level and turn it through a full circle. Sudden movements and tilting can make the direction harder to interpret while the device combines sensor readings.
Reopen the test in your browser. Close the test page and open it again. If the browser asks for access to motion or sensor data, allow it. On Android, review the browser's available site permissions under Chrome › ⋮ › Settings › Site settings. The options shown can vary by Android and Chrome version.
Check for an Android or browser update. Open Settings › System › Software update, if your tablet offers that path, and install available updates. Update the browser from the tablet's app store, then run the test again.
Compare in another supported browser. Open the Sensors Test in a second up-to-date browser. If neither browser shows changing compass data, the tablet may lack a magnetometer or the sensor may not be working. If one browser works, the issue is more likely browser support or permission.
Restart the tablet. A restart can clear a temporary sensor or browser problem. After it starts, retest away from magnetic objects before changing more settings.

Android's Settings › Location controls location access, not whether a magnetometer exists. Turning location on may help an app that needs your position, but it cannot make a compass sensor appear. Menu names can vary by manufacturer, so use the Settings search field if a path looks different.

When the tablet may not have a compass

Some low-cost tablets include motion sensors for screen rotation but leave out a magnetometer. Screen rotation alone does not prove that the tablet can find north. If the test shows no compass data in more than one browser, check the tablet's specifications or ask the manufacturer whether it includes a magnetic compass sensor.

If the tablet is supposed to have a magnetometer but gives no reading after updates and tests in different places, contact the seller or manufacturer, especially while it is under warranty. A browser test can show that compass data is unavailable, but it cannot diagnose a damaged sensor or repair it.

Why a compass can disagree with a map

A compass sensor detects Earth's magnetic field. Nearby magnets and metal can bend that field, so a reading can change when you move the tablet only a few feet. Magnetic north and true north are also not identical. For ordinary orientation, a stable approximate direction is usually enough. For surveying, navigation in hazardous conditions, or other precise work, use a suitable dedicated instrument rather than relying on a budget tablet's browser reading.