VDOT Running Calculator illustration

VDOT Running Calculator

Computes your VDOT score, Jack Daniels’ measure of running fitness, from any race between 3.5 minutes and 7 hours, then derives the five classic training zones: Easy, Marathon, Threshold, Interval and Repetition paces per km and per mile. Uses the original Daniels/Gilbert formulas for oxygen cost and the sustainable fraction of VO2max.

Notes

  • VDOT is "effective VO2max": it folds running economy into the number, so two runners with the same lab VO2max can have different VDOTs.
  • Zone boundaries are approximations of the tables in Daniels’ Running Formula.
  • Educational estimate for sport and training purposes, not professional coaching or medical advice.