Running Pace Converter
Convert running pace and speed between min/km, min/mi, km/h, mph, and constant-pace finish times for standard distances.
Input
Private by design: your values never leave your device.
Examples: 5:00, 5:30.5 or 5 for five minutes.
Pace
Speed
Finish times at constant pace
Finish times are constant-pace extrapolations, not performance predictions.
Good to know
Good to know
The running pace converter converts directly in your browser between pace (time per distance, e.g. “5:00” or “5:30.5”) and speed, and shows finish times at constant pace for common race distances. Pace resolution (whole seconds, tenths, or hundredths) and speed decimals are adjustable.
Typical searches include pace to km/h, min/km to min/mi, and calculate marathon pace. Calculation runs locally in the browser. Important: pace is time per distance, speed is distance per time — finish times are extrapolations at constant pace, not performance predictions, since training zones also depend on distance, elevation, weather, and fitness.
Typical use cases
Convert training pace into speed
Convert a target pace like 5:00 min/km into km/h to match it with treadmill or device displays.
Estimate a finish time for a race distance
See the extrapolated finish time for 5K, 10K, half marathon, or marathon at a constant pace.
Convert pace figures from min/mi to min/km
Convert pace figures from English-language training plans or US races into metric pace.
Tips for better results
Don't treat finish times as performance predictions
The displayed finish times are pure extrapolations at constant pace — real training zones also depend on distance, elevation, weather, and daily form.
Enter the pace format correctly
Enter pace in minutes:seconds format, such as “5:30” or with a decimal “5:30.5” — plain minute values like “5” are also accepted.
How it works
How it works
Step by step
Features
Features
Pace and speed at once
Enter pace or speed and see the other representation instantly.
Local conversion
Calculation happens directly in the browser, without transmission to a server.
Finish times for race distances
See extrapolated finish times at constant pace for common race distances, with adjustable resolution.
Frequently asked questions
Frequently asked questions
What's the difference between pace and speed?
Pace is time per distance (e.g., minutes per kilometer), speed is distance per time (e.g., km/h) — both describe the same tempo from different perspectives.
Are the finish times reliable predictions?
No. They are extrapolations at constant pace, not performance predictions — real results depend on the route, weather, and daily form.
Are my inputs uploaded?
No. Conversion runs entirely locally in the browser.
More tools
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