Speed Distance Time Calculator

Speed equals distance divided by time, and this solves that relation for whichever of the three you are missing. Pick the tab for the unknown, enter the two you know in any of the supported units, and the answer comes back converted into all of them at once. Distance can be miles, kilometres, metres, feet, yards or nautical miles, and speed can be miles per hour, kilometres per hour, metres per second, feet per second or knots, in any combination. It works on an average held for the whole trip, so stops and changes of pace are not modelled, and unlike a running pace calculator it is not tied to minutes per mile.