Running Pace Calculator

Turn a distance and time into pace per km/mile and speed.

Pace per km

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Speed

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Pace per mile

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Total time

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Distance

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Pace is time per distance; speed is distance per time. Build mileage gradually and listen to your body.

Pace, speed and time

Runners usually think in pace — minutes per kilometre or mile — while speed in km/h or mph is the same information flipped around. From a distance and a time, both fall out directly.

pace = time ÷ distance　·　speed = distance ÷ time

Knowing your pace lets you set targets and predict finish times: hold a steady pace and the time for any distance is just pace times distance. The calculator also converts between per-km and per-mile pace.

Worked example

Running 5 km in 25 minutes is a pace of 5:00 per kilometre — a speed of 12 km/h, or about 8:03 per mile.

Training by pace

Pace turns a vague effort into a plan. Easy runs, tempo work and intervals each sit in their own pace range, and pacing evenly is often the difference between a strong finish and fading early. Treat the numbers as a guide, not a master.

Handy to know

Even splits pay off. Starting too fast usually costs more later.
Predict finish times. Pace × distance gives a quick target.
Build gradually. Increase distance and intensity in small steps.

Frequently asked questions

What is the difference between pace and speed?

Pace is time per distance (minutes per km or mile) — lower is faster. Speed is distance per time (km/h or mph) — higher is faster. They describe the same effort two ways.

How do I convert pace between km and miles?

Multiply a per-kilometre pace by about 1.609 to get per-mile, since a mile is longer. The calculator shows both so you do not have to.

How can I estimate a race finish time?

Multiply your target pace by the race distance. At 5:00 per km, a 10 km would take about 50 minutes if you hold the pace.

Should I run at an even pace?

Even or slightly negative splits — the second half as fast or faster — are a common approach for steady efforts. Listen to your body and build up sensibly.