Tools for runners

Pace calculator

Find your pace, finish time, or distance, switch between miles and kilometers, and estimate your time at another distance.

Use the calculatorSee the pace chart

Calculator

Pace, time, and distance

Choose what you want to find, then enter the other two. Results update as you type.

What do you want to find?
Finish time
Pace

Result

Enter a distance and a finish time to see your pace.

Race time predictor

Enter a recent race and get an estimate for other distances.

Your finish time

Enter a recent race distance and finish time to see predictions.

Predictions use Riegel’s formula and assume similar training, terrain, and weather. They’re most reliable between nearby distances, like 5K to 10K. For the marathon and 50K, treat them as a best case unless you’ve trained for that distance.

Tips

Using pace on race day

Line up by pace

Knowing your pace helps you pick a starting spot, so you’re not weaving around slower runners or getting swept out too fast.

Start steady

Most runners do best with an even effort. Going out much faster than your goal pace usually costs more time late in the race than it saves early.

Predictions are estimates

The race time predictor assumes similar training, terrain, and weather. It’s most reliable between nearby distances, like 5K to 10K.

Pace chart

Finish times by pace

Finish times for common race distances at paces from 6:00 to 15:00 per mile, rounded to the nearest second.

Finish times by pace per mile
Pace per mile Pace per km 1 mile 5K 10K Half marathon Marathon
6:00 3:44 6:00 18:38 37:17 1:18:39 2:37:19
6:30 4:02 6:30 20:12 40:23 1:25:13 2:50:25
7:00 4:21 7:00 21:45 43:30 1:31:46 3:03:32
7:30 4:40 7:30 23:18 46:36 1:38:19 3:16:38
8:00 4:58 8:00 24:51 49:43 1:44:53 3:29:45
8:30 5:17 8:30 26:24 52:49 1:51:26 3:42:52
9:00 5:36 9:00 27:58 55:55 1:57:59 3:55:58
9:30 5:54 9:30 29:31 59:02 2:04:32 4:09:05
10:00 6:13 10:00 31:04 1:02:08 2:11:06 4:22:11
10:30 6:31 10:30 32:37 1:05:15 2:17:39 4:35:18
11:00 6:50 11:00 34:11 1:08:21 2:24:12 4:48:24
11:30 7:09 11:30 35:44 1:11:27 2:30:45 5:01:31
12:00 7:27 12:00 37:17 1:14:34 2:37:19 5:14:38
12:30 7:46 12:30 38:50 1:17:40 2:43:52 5:27:44
13:00 8:05 13:00 40:23 1:20:47 2:50:25 5:40:51
13:30 8:23 13:30 41:57 1:23:53 2:56:59 5:53:57
14:00 8:42 14:00 43:30 1:27:00 3:03:32 6:07:04
14:30 9:01 14:30 45:03 1:30:06 3:10:05 6:20:10
15:00 9:19 15:00 46:36 1:33:12 3:16:38 6:33:17

Questions

About pace and predictions

What’s the difference between pace and speed?

Pace is time per distance, like 8:30 per mile. Speed is distance per time, like 7.1 miles per hour. Runners usually talk in pace, while treadmills often show speed.

It uses a formula published by Peter Riegel: T2 = T1 × (D2 ÷ D1)1.06. The 1.06 exponent reflects how most runners slow down a little as the distance gets longer.

Treat the result as a ballpark. Training, terrain, hills, and heat all matter, and predictions get less reliable the further apart the two distances are.

The pace in our results is based on your official time and the race distance. Your watch divides by its own GPS distance, which usually reads a little long, so its pace often looks a bit faster.

Yes. Choose kilometers for distance and per km for pace. The results always show both units, so you can compare.

Put it to work

Find a race to run.

See the races we’re timing next, or check how your last race went.

Upcoming racesFind results