Running Pace Calculator
Find your pace from a distance and a finish time. Enter both and we'll show pace per mile, pace per kilometer, and speed.
Example: with Race preset Custom · Distance 3.1 · Minutes 28 m → Pace / mile: 9:02 /mi.
- Pace / km5:37 /km
- Speed (mph)6.64
- Speed (km/h)10.69
Computed by the calculator below using its default values. Change any input to see your own numbers.
Your speed
Splits
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Check it outUsing pace
Pace is time per unit of distance — the lower the number, the faster you're moving. The defaults show a 28-minute 5K (3.1 miles). Flip the unit to km if you train in metric, and use the result to set splits for your next race.
How it’s calculated
Pace = time ÷ distance; speed = distance ÷ time. Converted between miles and kilometers (1 mile = 1.60934 km).
"Solve for" lets any two of pace, time, and distance drive the third: choose Time to get a finish time from a distance and target pace, or Distance to see how far a given pace covers in a set time. Race presets fill the standard 5K/10K/half/full distances, and the splits table divides your total time evenly across each mile or km.
Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.
Common mistakes
- Mixing up miles and kilometers.
- Entering total time in the wrong field (h/m/s).
Frequently asked questions
What's a 5K and 10K in miles?
A 5K is 3.1 miles and a 10K is 6.2 miles. A half marathon is 13.1 and a marathon 26.2.
How do I hit a goal time?
Work backward: enter your goal distance and time to see the pace you need to hold per mile or km.
Pace vs speed?
Pace is minutes per mile/km; speed is miles or km per hour. Both are shown here.