Choose your unit
Pick miles or kilometers to match how you train and race.
Enter any two of distance, time and pace, then calculate to instantly solve for the missing value.
Fill in any two fields, then calculate to solve for the field you edited least recently.
Pick miles or kilometers to match how you train and race.
Fill in any two of distance, time and pace — leave the third blank or stale.
Click calculate to instantly solve for the missing value.
Fill in any two of distance, time and pace, then click Calculate. The calculator automatically solves for whichever field you edited least recently.
Enter time as hh:mm:ss (or mm:ss for shorter runs) and pace as mm:ss per mile or kilometer, matching your selected distance unit.
Pace is your total time divided by your total distance. The same relationship works in reverse to solve for time (pace × distance) or distance (time ÷ pace).