GPS Speed Test
SpeedCheck needs your device's location to measure speed. Your browser will ask for permission when you tap Start Tracking — your location is never stored or sent anywhere.
Do not interact with this device while driving. Have a passenger operate it, or mount it securely and glance only when safe to do so.
How to read your GPS signal quality
Start tracking and watch the signal indicator at the top of the gauge. It shows a live accuracy figure in meters, reported directly by your device's location hardware. Excellent and good readings (roughly 10m or better) give the most reliable speed; fair and poor readings still display a speed, but one derived from noisier position data.
If your signal stays poor, step outside with a clear view of the sky and wait — most consumer GPS chips acquire a usable fix within 30 seconds in open conditions.
Other speedometers
Related guides
Frequently asked questions
- What does the accuracy number (±Xm) mean?
- It's the horizontal accuracy radius your device reports, in meters. A smaller number means your device is more confident in its position. Values under 10m are typically good for speed measurement; above 50m is excluded from this tool's live stats.
- Why is my GPS signal poor?
- Common causes are being indoors, under tree cover, between tall buildings, or having just started (GPS needs a few seconds to acquire satellites). Moving to open sky usually resolves it within 10–30 seconds.
- Does this test my internet connection?
- No — it tests your device's GPS chip and the Geolocation API's output. An internet connection can speed up the initial fix on some devices (assisted GPS), but isn't required for GPS itself to work.