Running Pace Calculator
Convert between pace (min/km) and speed (km/h), and calculate total run time from distance and time.
100% client-side · no upload
Pace
Speed
How to use
- Enter your run distance in kilometres.
- Enter the total time in MM:SS format (e.g., 50:00) or HH:MM:SS for runs over an hour.
- Click Calculate Pace to see your min/km pace and km/h speed.
Related sport tools
- Marathon Time Predictor — predict race time from a shorter effort
- Training Load Calculator — quantify session stress with RPE × duration
- VO₂ Max Estimator — estimate aerobic capacity from heart rate
- Heart Rate Zones — calculate training zones from max HR
Frequently Asked Questions
- Is this running pace calculator free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.
Last updated: By jarvisbox