How Accurate Is Your GPS?
Read your device's GPS coordinates, altitude, speed, and accuracy radius in real time. Verify GPS fix quality and identify signal issues — all processed locally in your browser.
This test uses the Geolocation API to read latitude, longitude, altitude, speed, heading, and accuracy radius from your device's GPS receiver, Wi-Fi positioning, or cell tower triangulation.
Modern smartphone GPS achieves 3–5 meter accuracy outdoors. Indoors, accuracy drops to 10–50 meters as the device falls back to Wi-Fi and cell tower positioning.
What Do Your Results Mean?
| Result | Range | Meaning |
|---|---|---|
| Good | Accuracy radius under 10 meters | Your GPS is working well with a strong satellite fix. This level of accuracy is suitable for turn-by-turn navigation and precise location tracking. |
| Warning | Accuracy radius 10–50 meters | Moderate accuracy, likely using a combination of GPS and Wi-Fi or cell tower positioning. This is common indoors or in urban canyons with obstructed sky view. |
| Poor | Accuracy radius over 50 meters or no GPS fix | Poor GPS signal. You may be indoors, underground, or in an area with heavy signal obstruction. The device is relying primarily on Wi-Fi or cell tower positioning. |
Common Issues & Solutions
Location permission denied or not prompting
Check your browser's site permissions and ensure location access is allowed for this site. On mobile, verify that Location Services is enabled in your device's system settings (Settings → Privacy → Location Services on iOS, Settings → Location on Android).
GPS accuracy is very poor or takes a long time to get a fix
Move to an area with clear sky view — GPS requires line-of-sight to satellites. Indoor environments, underground locations, and dense urban areas degrade GPS accuracy significantly. Enable Wi-Fi to assist positioning even if not connected to a network.