Running Pace Calculator

Fill in any two of distance, time, and pace — the third updates instantly. Toggle between km and miles, click a race preset, view a splits table.

Splits table

How pace is calculated

Pace is the time it takes to cover a unit of distance — typically minutes per kilometre or per mile. Given any two of distance, time, and pace, the third follows from a single division. This calculator stores everything internally in metres and seconds, so switching units does not lose precision.

Splits divide your run into per-kilometre or per-mile segments. Even splits hold a constant pace; negative splits run the second half faster than the first; positive splits do the opposite. Coaches widely recommend negative splits for race-day pacing.

One caveat: this calculator works from total time. If your watch reports moving time separately, use that for a more useful average pace — total time includes traffic-light stops, gel pauses, and water breaks.

Frequently asked questions

What is a good 5K pace for beginners?

A common beginner 5K pace is around 7:00–8:00 per kilometre (11:15–12:50 per mile). Improvement comes with consistent weekly mileage rather than chasing speed too early.

How do I convert min/km to min/mile?

Multiply the per-kilometre pace by 1.609. So 5:00/km is roughly 8:03/mile. The unit toggle above does this for you live.

What pace do I need for a sub-2-hour half marathon?

Just under 5:41 per kilometre, or about 9:09 per mile. Try the calculator with distance 21.0975 km and time 1:59:59 to see the pace.

Does pace include warm-up and cool-down?

It depends on which time you enter. If you log only the workout portion of the run, the pace reflects that. Many watches show separate "moving" and "total" time — use moving time for a cleaner average.

Can I share my calculation?

Yes — the URL updates as you type. Copy and share, and the calculator will load with the same values for whoever opens it.

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