Free Race Time Predictor

Enter one race for a prediction — or add a second to reveal your speed-vs-endurance profile and training paces. Free, no signup.

Distance	Time	Pace	Confidence

Predicted times by distance

Your training paces

Zone	Pace	What it's for

Get your race-day pace band

Pick your goal race and we'll email you a printable pace band PDF.

These come from a single race. Connect Strava and NavRun predicts from your real last-8-weeks training — and adjusts as your fitness changes.

Connect Strava — Start Free

Questions

Yes. No account, no credit card. Enter one recent race and get instant predictions across every distance.

No. Predictions are instant and ungated. You only share an email if you want the printable race-day pace band.

We use a higher Riegel exponent for ultra distances, but extrapolating a short race to 50+ miles is a rough ceiling at best. Vert, terrain, heat, and nutrition decide ultras. Connect Strava for predictions built on your real training.

Want this from your real training?

These tools run on what you type in. Connect Strava and NavRun builds your predictions, training paces, and race-day plans from your actual last-8-weeks of running.