How do I calculate running pace?
Divide your finish time by your distance. A 25-minute 5K is 5:00 per kilometre. To work the other way, multiply your pace by your distance: 5:00 per kilometre over 10K gives a 50-minute finish.
Free running tool
Running Pace Calculator
Find your pace, plan your finish time and know what each kilometre should look like. From your first 5K to your next marathon.
Explore your speed
How does your 400m time stack up?
Explore age-based benchmarks and the six-week progression in our 400m guide.
Simple maths. A clearer run plan.
Choose your distance, then enter either your finish time or your target pace. Use elapsed time, including stops, if you want the result to reflect the full time from start to finish.
Calculate pace
Time ÷ distance
Calculate finish time
Pace × distance
Frequently asked questions
Can I use miles?
Yes. Enter your distance in kilometres or miles, and enter a target pace in min/km or min/mile. Both pace units appear in your result. Splits are always shown in kilometres. One mile is 1.609344 kilometres.
What distances do the race buttons use?
5K uses 5 km, 10K uses 10 km, a half-marathon uses 21.0975 km and a marathon uses 42.195 km. You can also enter a custom distance from 0.1 to 100 km.
Does this predict my race performance?
It calculates the time needed at a constant pace. It does not predict whether you can sustain that pace over a longer distance. Hills, weather, stops and changes in effort can all affect your finish time.
Why is the last split shorter?
Distances such as the half-marathon and marathon finish partway through a kilometre. The last row gives the time for that remaining distance. Every elapsed time is calculated before rounding, so rounded split times may not add up exactly.
This calculator provides arithmetic for planning, not a personalised training prescription or a guarantee of race performance.