Tool · Pace & time
Running pace, time and distance calculator
Enter two values out of three and the calculator works out the third. Enter a distance and a time to get your pace, a distance and a pace to estimate your time, or a time and a pace to see how far you can go. Your speed in mph is calculated every time.
Pace and speed are two sides of the same number: pace (min/mi) = 60 ÷ speed (mph). These figures assume an even pace over the whole distance.
How to calculate your running pace
Your pace is the time it takes to cover one mile (in min/mi). Three quantities are linked: distance, time and pace. Know two of them and the third follows directly. To stay precise, work with your pace expressed in seconds per mile.
1. Find your pace (distance + time)
Example: a 10K (6.214 mi) in 50:00 (3,000 seconds) gives 3,000 ÷ 6.214 = 483 seconds per mile, or 8:03/mi.
2. Find your time (distance + pace)
Example: aiming for 8:00/mi (480 seconds) over a half marathon (13.109 mi) gives 480 × 13.109 = 6,292 seconds, about 1:44:52.
3. Find your distance (time + pace)
Example: 45 minutes (2,700 seconds) at 9:00/mi (540 seconds) covers 2,700 ÷ 540 = 5 miles.
Pace and speed
Speed is the other way of saying the same thing. It always comes from your pace:
With 480 seconds per mile: 3,600 ÷ 480 = 7.5 mph. The other way round, pace (min/mi) = 60 ÷ speed (mph).
Pace, speed and finish times
For each pace (in min/mi), the matching speed and the estimated finish time over the classic distances, at a perfectly even pace.
| Pace | Speed | 5K | 10K | Half | Marathon |
|---|---|---|---|---|---|
| 6:30 /mi | 9.2 mph | 20:12 | 40:23 | 1:25:13 | 2:50:25 |
| 7:00 /mi | 8.6 mph | 21:45 | 43:30 | 1:31:46 | 3:03:32 |
| 8:00 /mi | 7.5 mph | 24:51 | 49:43 | 1:44:53 | 3:29:45 |
| 9:00 /mi | 6.7 mph | 27:58 | 55:55 | 1:57:59 | 3:55:58 |
| 10:00 /mi | 6.0 mph | 31:04 | 1:02:08 | 2:11:06 | 4:22:11 |
| 11:00 /mi | 5.5 mph | 34:11 | 1:08:21 | 2:24:12 | 4:48:24 |
| 12:00 /mi | 5.0 mph | 37:17 | 1:14:34 | 2:37:19 | 5:14:38 |
These times assume an even pace over the whole distance. In real conditions, the pace you can hold drops as the distance grows: this chart is a benchmark, not a performance prediction.
Frequently asked questions
How do I calculate my running pace?
Pace is the time it takes to cover one mile. Divide your total time by the distance: pace (seconds per mile) = total time in seconds ÷ distance in miles. Example: 3 miles in 27 minutes (1,620 seconds) gives 1,620 ÷ 3 = 540 seconds per mile, a pace of 9:00/mi.
What’s the difference between pace and speed?
They describe the same thing in two ways. Pace (min/mi) tells you how long a mile takes, speed (mph) how far you go in an hour. You switch between them with: speed (mph) = 60 ÷ pace (min/mi), and pace (min/mi) = 60 ÷ speed (mph). A pace of 8:00/mi is therefore 7.5 mph.
How do I estimate my race time from a target pace?
Multiply your pace (in seconds per mile) by the distance in miles. Example: aiming for 8:00/mi (480 seconds) over a half marathon (13.109 mi) gives 480 × 13.109 = 6,292 seconds, about 1 h 44 min 52 s. That’s the “Find time” mode of this tool.
How far can I run in a given time at a given pace?
Divide your total time (in seconds) by your pace (in seconds per mile). Example: 45 minutes (2,700 seconds) at 9:00/mi (540 seconds) gives 2,700 ÷ 540 = 5 miles. That’s the “Find distance” mode of the tool.
Does this calculation account for fatigue and hills?
No. This calculator assumes a perfectly even pace over the whole course, on flat ground. In reality, your pace shifts with fatigue, wind, heat and elevation. To see how your times change from one distance to another, use a race time predictor instead, which factors in the drop in pace as the distance grows.
Turn your target pace into a training plan
RunMorph sets your session paces around your goal and builds a periodized plan all the way to race day.
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