Free VDOT calculator
Enter a recent race time. We compute your VDOT and project times for 5K, 10K, half-marathon, marathon and ultra distances. With optional altitude correction.
VDOT is Jack Daniels' estimate of your aerobic capacity based on a race time. Predictions improve with multiple data points — Vetta uses the median of your top-3 in 28 days. Get the full engine with your real history from Strava.