Pace calculator

Pace, finish time or distance for running and walking, in km or miles.

Formula Health & fitness

Pace per km

Pace per mile: 8:51 /mi
Speed: ≈ 10.91 km/h
Speed in mph: ≈ 6.78 mph

How it works

Pace is time divided by distance, usually written as minutes and seconds per kilometre or per mile. Knowing any two of pace, time and distance gives the third.

One mile is exactly 1.609344 km. The half marathon is 21.0975 km and the marathon 42.195 km, as set by World Athletics.

Results assume an even pace from start to finish; hills, heat and fatigue change real race times.

Formula

Pace = time ÷ distance
Time = pace × distance
Distance = time ÷ pace
Speed (km/h) = distance (km) ÷ time (h)

Worked example

Running 10 km in 55 minutes is a pace of 55 ÷ 10 = 5.5 minutes, or 5:30 per km. That is 8:51 per mile and a speed of 10.91 km/h.

Questions people ask

How do I convert pace per km to pace per mile?

Multiply by 1.609344. A 5:00 per km pace is 8:03 per mile.

What pace do I need for a sub-4-hour marathon?

Faster than 5:41 per km, or 9:09 per mile, held for the full 42.195 km.