How accurate is GoPro GPS for lap timing?

It's the fair question to ask before you trust your lap times to a camera. How accurate is GoPro GPS, really? The honest answer is good enough for what most racers need, with a couple of caveats worth understanding.

How often it measures

Recent GoPros record GPS at 10Hz, ten position readings a second. At a typical kart pace that's a reading every metre or so. Enough to capture the shape of a corner, time a lap and split it into sectors. Older models recorded at 18Hz, and the Hero 10 changed mid-life, but the practical difference for lap timing is small.

What 10Hz won't do is match a dedicated 25Hz motorsport logger for fine detail. If you're analysing throttle and brake traces at the very limit, you'll feel the gap. For working out which corner is costing you and what your line is doing, you won't.

How precise each reading is

Consumer GPS like a GoPro's is accurate to within a few metres in good conditions. On an open circuit with a clear sky, that's plenty for a consistent racing line and reliable lap times. The accuracy drops where the signal struggles: tall pit buildings, grandstands, dense trees, anywhere the signal bounces before it reaches the antenna. There you can see the trace wander or cut a corner it didn't.

The newer chips, in the Hero 11 and 13, handle this better than older ones because they read more satellite systems at once for a steadier fix.

The thing that matters more than accuracy

Most "bad GPS" isn't really an accuracy problem. It's a lock problem. If the camera hadn't locked onto enough satellites before you hit record, the data is poor or missing no matter how good the chip is. Clear sky, solid lock before recording, antenna not blocked. Get those right and the accuracy looks after itself. Here's the full fix list if your GPS isn't behaving.

Making it good enough

Software matters too. When you upload to Race Ninja, it cleans the GPS before timing anything, smoothing out stray points and filtering noise so a single bad reading doesn't ruin a lap or kink your racing line, we've developed this technology over years and I'd challenge anyone to see any difference between their lines on the maps and the video playing, because our augmentation and fusion that takes place in our processing pipeline really nails the extra precision. And if a session is genuinely too noisy to trust, it tells you, rather than handing you a lap time it can't stand behind.

So is GoPro GPS accurate enough to race with? For lap times, sectors and racing lines, yes, comfortably. Mount it well, get a clean lock, and let good software do the rest.