Calcometry

Running Pace Calculator

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Solve for pace, finish time, or distance — metric (min/km) or imperial (min/mile).

Two of three: time, distance, pace

Solve for

Pace

5:00 /km

50:00 for 10 km

Pace per mile
8:03 /km
Speed
12 km/h

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Running pace math

Running pace is time divided by distance — typically minutes per kilometer or per mile. Finish time equals pace × distance. If you know how long you ran and how far, pace = time ÷ distance.

Race pacing strategies often target even splits — the same pace each kilometer — though hills, weather, and fitness cause variation. Negative splits (second half faster) are common in well-executed races.

Example: 5 km in 25 minutes → 5:00/km pace (about 8:03/mile). A 4:30/km pace for 10 km predicts a 45-minute finish.

Common questions

Pace per mile vs per km?

Multiply or divide by 1.609 to convert between min/km and min/mile. This calculator shows both in results when using metric inputs.

Does this account for elevation?

No. Hills slow effective pace — compare efforts on similar courses or use heart rate or perceived exertion on hilly routes.