Pace calculator | Calculate Your Ideal Pace
Use our Pace Calculator to find your running pace, time, and distance. Enter any two variables for quick results to improve your training for 5K, half marathon, or marathon.
What is a pace calculator?
A pace calculator works out your running or cycling pace — the time per kilometer or mile — from a distance and a time. It can also solve for the time or distance, convert pace to speed in km/h and mph, and predict 5K, 10K, half marathon and marathon finish times.
Calculate running and cycling pace, distance, or time. Solve for any one from the other two, with speed in km/h and mph, per-km and per-mile splits, and predicted 5K, 10K, half marathon and marathon finish times.
Tip: leading zeros are optional in time fields — type 5:30 instead of 00:05:30.
How to use this calculator
- Choose what you want to solve for: pace, time, or distance.
- Enter the two values you already know.
- Pick a preset event distance, or type your own.
- Click Calculate to see pace, speed, splits and race predictions.
World record paces
| Category | Men's record pace | Women's record pace |
|---|---|---|
| 5K | 2:31/km or 4:04/mi | 2:50/km or 4:34/mi |
| 10K | 2:38/km or 4:14/mi | 2:57/km or 4:45/mi |
| Half marathon | 2:46/km or 4:27/mi | 3:05/km or 4:58/mi |
| Marathon | 2:55/km or 4:41/mi | 3:13/km or 5:10/mi |
Training by pace and heart rate
Pace and heart rate rise together: a faster pace usually means a higher heart rate. Tracking both helps you train in the right zone and measure progress.
Heart rate zones
- Recovery zone (50-60%)50-60%
- Fat-burning zone (60-70%)60-70%
- Aerobic zone (70-80%)70-80%
- Anaerobic zone (80-90%)80-90%
Training tips
- Use the 220 − age formula as a rough guide to your maximum heart rate.
- Run easy at 60-70% of max heart rate to build aerobic endurance.
- Most training should be slower than race pace to avoid injury.
- Use interval and tempo runs to raise your sustainable pace.
