Comprehensive Calculator Guide
Running pace is the time it takes you to cover one kilometre: divide your total time by the distance. 5 km in 30 minutes is a pace of 6:00 per kilometre and an average speed of 10 km/h. Enter distance and time to see both instantly.
Pace and speed
Speed is kilometres per hour; pace is minutes per kilometre. Convert either by dividing it into 60: a 6:00 pace is 10 km/h, and 12 km/h is a 5:00 pace. Pace is shown in minutes and seconds, so 5.5 minutes reads 5:30, not 5:50.
Time defaults to minutes, with hours and seconds available: 1 h 45 min 30 s is 105.5 minutes. Distance can be kilometres, miles or metres, but pace is always per kilometre.
Race targets and watch readings
A half marathon is 21.0975 km and a marathon 42.195 km. Enter the race distance and your target time to get the pace you need: about 5:41 per km for a two-hour half, exactly 5:00 for 25 minutes over 5 km. GPS watches can drift near tall buildings, and auto-pause makes pace look faster than your real race average.
How to Use
- 01Enter the distance and choose kilometres, miles or metres.
- 02Enter the total time and choose minutes, hours or seconds.
- 03Read the pace per kilometre and the average speed.
- 04For a goal, enter the race distance and the time you want.
Formula Used
Pace (min/km) = time in minutes ÷ distance in km | Speed (km/h) = distance × 60 ÷ time in minutesPractical Examples
Example 1: a 5K run
5 km in 30 min: 6:00 per km, 10 km/h.
Example 2: half-marathon goal
21.0975 km in 120 min: about 5:41 per km, 10.55 km/h.
Example 3: a brisk walk
3 km in 36 min: 12:00 per km, 5 km/h.
Important Tips
- In hot weather run early or late and expect a slower pace.
- Start races slightly slower than goal pace.
Common Mistakes to Avoid
- Reading a decimal pace of 5.5 as 5:50 instead of 5:30.
- Using auto-paused watch time for a race average.
Frequently Asked Questions
- How do I calculate running pace?
- Divide minutes by kilometres: 55 min over 10 km is 5.5 min, a 5:30 pace.
- How do I turn pace into speed?
- Divide 60 by the pace in minutes: 5:00 is 12 km/h.
- What pace for a 25-minute 5K?
- Exactly 5:00 per kilometre, or 12 km/h.
- How long are a marathon and a half marathon?
- 42.195 km and 21.0975 km.