VDOT Calculator

VDOT is the single running fitness number Jack Daniels and Jimmy Gilbert published in Oxygen Power in 1979, worked out from one race result and used to set training paces. Enter a race distance and the time you ran, and this returns the VDOT along with the times at nine other distances the same VDOT would produce; a second mode turns a VDOT into the Easy, Marathon, Threshold, Interval and Repetition paces per kilometre, per mile and as track splits, naming the percentage of VO2max each one is set at. Behind it are two published curves, the oxygen cost of running at a given speed and the fraction of maximum a runner holds for a given length of time, and the race times land within a few seconds of the printed tables. It is a model fitted to race performances rather than a measurement of anybody's physiology, so a race run in heat, on hills or at a distance you have not trained for gives a VDOT that is not yours.