Running Pace Calculator
Enter any two of distance, time, or pace — get the third instantly. Works with miles or kilometers, preset race distances, and shareable result links.
Pace Calculator
How pace works
Pace is simply time divided by distance. Run 5 kilometers in 25 minutes and your pace is 5:00 per kilometer. Run a mile in 9 minutes flat and your pace is 9:00 per mile. Every other running number — finish times, splits, race predictions — starts here.
The three calculations runners do all the time:
- Pace from distance and time: you just finished a run, you know how far and how long, and you want to know how fast you were actually going.
- Time from distance and pace:you're about to race and you want to know what finish time your goal pace produces. Or you're planning a long run and want to budget your morning.
- Distance from time and pace:you have a set window of time (say, a 45-minute lunch run) and a target pace, and you want to know how far you'll cover.
Common race pace targets
Here's what your pace needs to look like to hit a few common race goals:
| Goal | Pace /mi | Pace /km |
|---|---|---|
| Sub-20 5K | 6:26 | 4:00 |
| Sub-25 5K | 8:03 | 5:00 |
| Sub-50 10K | 8:03 | 5:00 |
| Sub-2:00 Half marathon | 9:09 | 5:41 |
| Sub-1:45 Half marathon | 8:00 | 4:58 |
| Sub-4:00 Marathon | 9:09 | 5:41 |
| Sub-3:30 Marathon | 8:00 | 4:58 |
| BQ 3:00 Marathon | 6:52 | 4:16 |
Pace vs. training paces
This calculator gives you the arithmetic — the pace you are running or want to run. It does not tell you which pace you should be using for a specific workout. For that, you need training pace zones (easy, marathon, threshold, interval, repetition) that are calibrated to your actual fitness.
If you want workout-specific paces, use our VDOT calculator. Enter a recent race and it outputs the exact pace you should hit for each type of run based on Jack Daniels' Running Formula.
Frequently asked questions
How do I convert pace between miles and kilometers?
Divide per-mile pace by 1.609344 to get per-kilometer pace, or multiply the other way. For example, 8:00 per mile ÷ 1.609344 ≈ 4:58 per kilometer. This calculator does the conversion for you.
Why is my pace different from what my watch said?
GPS watches sometimes drift, especially on tree-covered trails or near tall buildings. If your watch reports a different distance than the known race course, your reported pace will be off. Certified race courses are the most reliable source of true distance.
Can I use this for walking pace too?
Yes. Pace math is agnostic to running versus walking. The calculator handles any pace you throw at it.