Free running calculators
Work out your pace, predict race times, get training paces and print pace charts, pace bands and plans. Everything works in kilometres and miles and runs in your browser.
Quick pace check
Pace5:41/km
Pace9:09/mile
- DistanceMarathon
- Time4:00:00
- Speed10.55 km/h · 6.55 mph
All tools
- Pace calculatorPace, time or distance, with splits.
- Race time predictor5K, 10K, half and marathon from one race.
- VDOT calculatorTraining paces from a race time.
- Pace bandPrintable wristband with split times.
- Marathon pace chart2:30 to 6:30, km and miles.
- Half marathon pace chart1:10 to 3:15, km and miles.
- Beginner marathon plan16 to 18 weeks, printable.
- Beginner half marathon plan10 to 12 weeks, printable.
How the numbers are made
Paces are simple maths: time divided by distance. Race predictions use two published methods side by side, the Riegel formula (1981) and the Daniels and Gilbert VDOT equations (1979). Each tool page shows the formula it uses and where it comes from.
Nothing you type leaves your device. There are no accounts and no ads.