Running Pace Calculator — Pace, Speed & Race Predictions
Enter a race distance and your goal time — get exact min/km and min/mile splits plus speed, instantly.
Quick answer: Free running pace calculator: distance and finish time gives pace per km/mile, speed, and 10K/half predictions — instant.
How to use
- Enter distance and unit.
- Enter your finish time.
- Read pace, speed and predictions live.
About this tool
Training plans speak pace, treadmills speak speed, watches speak both. This calculator converts your goal into the numbers your run needs — plus honest Riegel-formula predictions for other race distances.
FAQ
What pace for a 25-minute 5K?
5:00 min/km (8:03 min/mile) — enter it and see.
How accurate are predictions?
Riegel formula is good when training matches the distance — a target, not a promise.
Treadmill speed?
The speed readout converts directly.
Walking?
Identical math — pace is pace.
GPS drift?
Pace from known distances (race/track) beats GPS jitter — compute after the race.
Mobile?
Yes — big touch inputs, works offline.
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