What pace do I need for a given 100 m time?

Divide the target time by the distance in kilometres. For the 100 metres, 1:30 per kilometre gives 0:09. The chart below covers the range most runners race in.

Are the projections to other distances reliable?

No, and the page says so. They assume the same pace holds over a different distance, which it does not — pace falls as distance rises. Riegel's formula applies a fatigue exponent and is the right tool for actual prediction.

Why does the split table have a partial final segment?

Because 100 metres is 0.1 km, which is not a whole number of split intervals. The final partial segment is shown rather than dropped, since a table that ends before the finish line is wrong exactly where it matters.

100 metres pace calculator

Work out 100 metres pace from a finish time, or a finish time from a pace. The chart below covers the range most runners race in.

Result

These are estimates from population-level equations, not a measurement of you and not medical advice. Individual results vary widely. Talk to a doctor or a registered dietitian before making significant changes to how you eat or train.

The 100 metres

The 100 metres is a pure sprint, over in seconds, and effectively unpaced — the race is run at maximum from the first stride.

Physiologically, the 100 metres is bounded by almost entirely anaerobic. Performance is set by rate of force development, stride mechanics and the ability to reach and briefly hold top speed. Aerobic fitness is close to irrelevant.

There is no pacing strategy in the usual sense. Most runners reach top speed somewhere between 50 and 70 metres and then decelerate slightly; the race is won by decelerating least.

Distance: 0.1 km (100 m).

100 metres pace chart

Finish time, pace per mile and speed for each pace per kilometre. Everything is computed in metres and seconds and converted once, so no rounding accumulates down the table.

100 metres pace chart
Pace / km	Finish time	Pace / mile	Speed
1:00	0:06	1:37	60 km/h
1:10	0:07	1:53	51.4 km/h
1:20	0:08	2:09	45 km/h
1:30	0:09	2:25	40 km/h
1:40	0:10	2:41	36 km/h
1:50	0:11	2:57	32.7 km/h
2:00	0:12	3:13	30 km/h

Split times

1:30 / km · 0:09

Split times
Distance	Elapsed
20 m	0:02
40 m	0:04
60 m	0:05
80 m	0:07
100 m	0:09

Questions

What pace do I need for a given 100 m time?: Divide the target time by the distance in kilometres. For the 100 metres, 1:30 per kilometre gives 0:09. The chart below covers the range most runners race in.
How should I pace a 100 m?: There is no pacing strategy in the usual sense. Most runners reach top speed somewhere between 50 and 70 metres and then decelerate slightly; the race is won by decelerating least.
What limits performance over the 100 m?: Almost entirely anaerobic. Performance is set by rate of force development, stride mechanics and the ability to reach and briefly hold top speed. Aerobic fitness is close to irrelevant.
Are the projections to other distances reliable?: No, and the page says so. They assume the same pace holds over a different distance, which it does not — pace falls as distance rises. Riegel's formula applies a fatigue exponent and is the right tool for actual prediction.
Why does the split table have a partial final segment?: Because 100 metres is 0.1 km, which is not a whole number of split intervals. The final partial segment is shown rather than dropped, since a table that ends before the finish line is wrong exactly where it matters.