Free tool
Race time predictor
Enter one recent result and get your equivalent times from 5K to marathon, plus the exact training paces to improve them — powered by the Daniels VDOT model, the standard coaches trust.
Enter a recent finish time to see your equivalent race times and training paces.
How it works
One number that ties your racing together
Your VDOT is an effective running-economy score derived from a race performance — how fast you cover ground for the oxygen cost. Two runners with the same VDOT should run roughly the same times across distances, which is what makes equivalent-time tables possible.
The catch: a one-off calculator only knows the single race you type in. It assumes you're equally trained for every distance — a 5K time converts to a marathon prediction only if you've done the mileage. Velox closes that gap by reading your actual Garmin training history, weighting your recent workload and VO₂ trend, and attaching an honest confidence rating to every distance.
Connect your Garmin and calibrate this to your real training
Turn a prediction into a plan
Velox reads your real training, sharpens these predictions, and builds the week-by-week plan to beat them.
Free forever · No credit card to start · 7-day Pro trial