Pace Calculator
Work out your pace per kilometer or mile, your finish time for a target pace, or how far you can go in a given time.
Result
Enter your values and select Calculate to see the result.
How to use this calculator
- Choose what to calculate: pace, finish time or distance.
- Choose kilometers or miles. Pace is entered and shown per the chosen unit.
- Fill in the remaining fields. The race-distance buttons fill in common distances.
Formula
pace = time ÷ distancetime = pace × distancedistance = time ÷ pacespeed = distance ÷ time
1 mile = 1.609344 km, so pace per mile = pace per km × 1.609344.
Worked example
10 km in 52:30
52.5 minutes ÷ 10 km = 5:15 per km, which is 8:27 per mile and 11.43 km/h.
Marathon finish time
At an even 5:00 per km over 42.195 km: 5 × 42.195 = 210.975 minutes = 3:30:59.
Assumptions and limitations
- Assumes an even pace throughout. Hills, wind, temperature and fatigue change real performance.
- Times are rounded to the nearest second.
- A half marathon is 21.0975 km and a marathon is 42.195 km.
Frequently asked questions
How do I convert pace per km to pace per mile?
Multiply by 1.609344. A 5:00 per km pace is about 8:03 per mile.
What is the difference between pace and speed?
Pace is time per distance (minutes per km), which runners usually use. Speed is distance per time (km/h). They are reciprocals of each other.