Pace Calculator
Solve pace, elapsed time or distance for running and walking, with kilometer and mile equivalents and speed in both units.
Calculator arithmetic runs locally in your browser and does not require an API.
The interactive calculator loads here when JavaScript is enabled.
How to use Pace Calculator
Choose the quantity to solve and enter the other two. Enter time as hours, minutes and seconds; pace uses minutes and seconds per selected distance unit. Re-enter values after changing units.
Formula and method
Pace = elapsed time / distance; time = pace × distance; distance = time / pace. Speed is distance / time. One mile is exactly 1.609344 kilometers.
Understanding the results
A lower minutes-per-unit pace corresponds to a higher speed. Results use elapsed time, not moving time, and do not compensate for stops, terrain or fatigue. Duration displays round to the nearest second.
Worked example
Covering 5 km in 25 minutes gives 5:00 per km and 12 km/h. The mile-equivalent pace is about 8:03 per mile, rounded to the nearest second.
Fitness and time estimates for general information; no training or treatment recommendation is made.
Frequently asked questions
How are pace and speed different?
Pace is time per distance; speed is distance per time. They express the same relationship in opposite ways.
Can I estimate time from a target pace?
Yes. Select time mode and provide pace and distance; the estimate assumes that pace is maintained.
Does the calculator remove stopped time?
No. Enter whichever elapsed duration you want to use; the tool does not detect stops.