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Pace and Speed Calculator
Enter distance and time. The pace output is per kilometre; per-mile pace is shown separately.
A zero distance or zero time leaves the pace undefined and shows a dash.
The arithmetic
Total seconds = hours × 3600 + minutes × 60 + seconds. Pace = total seconds ÷ distance. Per-mile pace multiplies the per-kilometre pace by 1.609344. Speed = distance ÷ hours.
Using it for goal times
To hold a target finish time, set the distance and time to the goal and read the per-kilometre pace. Check the split against your usual easy pace before committing to it in training.
Frequently asked questions
How do I enter a half marathon?
Enter 21.0975 km. For a marathon, use 42.195 km. Both are the certified distances.
Does the calculator handle walking?
Yes. Any distance and time work; the pace output is just as valid for a walk.
Why does per-mile pace look slower?
A mile is longer than a kilometre, so the minutes per mile are higher. The speed output is unaffected.