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How to calculate running pace

You ran a distance in a time, or you want to finish in a time. You will turn that into pace per kilometre and per mile, and see what the same pace gives for 5K, 10K, half and marathon. 10 km in 55:00 is 5:30 /km. Nothing leaves this tab.

6-minute read

Today's result Pace per km and per mile, speed, and finish times for the four common races at the same pace.

Open the pace calculator with the numbers from your watch or race plan. Type time as h:mm:ss or mm:ss and pace as m:ss. Race predictions assume an even pace. Nothing is uploaded.

Open Pace calculator
Contents

  1. Pick what you want to find

    Pace = time ÷ distance. Time = pace × distance. Distance = time ÷ pace. Decide which one you are missing; you fill in the other two.

    Pace = time ÷ distance: 55:00 over 10 km is 5:30 per km or 8:51 per mile.
    Pace = time ÷ distance: 55:00 over 10 km is 5:30 per km or 8:51 per mile.

  2. Open Pace calculator on cv.cm

    Pace is selected with 10 km in 55:00. The result and race times sit on the right. Nothing is uploaded.

    Open Pace calculator

  3. Enter distance and time

    Type 10 for distance and 55:00 for time. The pace reads 05:30 per km and 08:51 per mile, and the speed 10.91 km/h. Switch Unit to mi for miles.

  4. Or enter pace to get a time

    Set Calculate to Time, type the distance and a pace such as 5:00. A half marathon at 5:00 /km finishes in 1:45:29.

  5. Read the race predictions

    At 5:30 /km: 5K 27:30, 10K 55:00, half 1:56:02, marathon 3:52:04. Real races slow over distance, so plan a longer race a little slower than a short one.

    At 5:30 /km: 5K 27:30, 10K 55:00, half 1:56:02, marathon 3:52:04.
    At 5:30 /km: 5K 27:30, 10K 55:00, half 1:56:02, marathon 3:52:04.

  6. Copy the result

    Copy puts distance, time, both paces, speed and the four race times on the clipboard for a training log.

Use with these tools

FAQ

Can I calculate running pace free online?

Yes. cv.cm does the math in this tab. Nothing is uploaded.

What is 10 km in 55 minutes as pace?

5:30 per km, 8:51 per mile, or 10.91 km/h.

How do I convert pace per km to per mile?

Multiply by 1.609. The page shows both at once.

Are the race predictions reliable?

They assume you hold the same pace. Most runners slow a little over longer distances, so treat them as a best case.

What format does time take?

h:mm:ss or mm:ss, such as 1:45:29 or 55:00. Pace takes m:ss, such as 5:30.