Pace Calculator
Give any two of pace, time and distance to solve the third, or enter km/h or mph in Speed to pace. Results show pace per kilometre and mile and both speeds. Choose an official 5K, 10K, half or marathon distance, or enter your own. Even-pace splits and a finish-time comparison chart use your supplied numbers; they do not predict performance.
Marathon in 3:45:008:35 /mi · 11.25 km/h · 6.99 mph · finish 3:45:00
- Solve for
- Distance
- In
- Time
- Pace
- Per
- Race
Time reads as h:mm:ss or mm:ss, pace as m:ss, and a bare number is minutes. Changing a unit converts the value with it, and Race sets the official distance: a half marathon is 21.0975 km, not 21.1.
Splits
Every km at an even 5:20 per km, then the finish.
| Km | Split | Elapsed |
|---|---|---|
| 1 | 5:20 | 0:05:20 |
| 2 | 5:20 | 0:10:40 |
| 3 | 5:20 | 0:16:00 |
| 4 | 5:20 | 0:21:20 |
| 5 | 5:20 | 0:26:40 |
| 6 | 5:20 | 0:32:00 |
| 7 | 5:20 | 0:37:20 |
| 8 | 5:20 | 0:42:40 |
| 9 | 5:20 | 0:47:59 |
| 10 | 5:20 | 0:53:19 |
| 11 | 5:20 | 0:58:39 |
| 12 | 5:20 | 1:03:59 |
| 13 | 5:20 | 1:09:19 |
| 14 | 5:20 | 1:14:39 |
| 15 | 5:20 | 1:19:59 |
| 16 | 5:20 | 1:25:19 |
| 17 | 5:20 | 1:30:39 |
| 18 | 5:20 | 1:35:59 |
| 19 | 5:20 | 1:41:19 |
| 20 | 5:20 | 1:46:39 |
| 21 | 5:20 | 1:51:59 |
| 22 | 5:20 | 1:57:19 |
| 23 | 5:20 | 2:02:39 |
| 24 | 5:20 | 2:07:59 |
| 25 | 5:20 | 2:13:19 |
| 26 | 5:20 | 2:18:39 |
| 27 | 5:20 | 2:23:58 |
| 28 | 5:20 | 2:29:18 |
| 29 | 5:20 | 2:34:38 |
| 30 | 5:20 | 2:39:58 |
| 31 | 5:20 | 2:45:18 |
| 32 | 5:20 | 2:50:38 |
| 33 | 5:20 | 2:55:58 |
| 34 | 5:20 | 3:01:18 |
| 35 | 5:20 | 3:06:38 |
| 36 | 5:20 | 3:11:58 |
| 37 | 5:20 | 3:17:18 |
| 38 | 5:20 | 3:22:38 |
| 39 | 5:20 | 3:27:58 |
| 40 | 5:20 | 3:33:18 |
| 41 | 5:20 | 3:38:38 |
| 42 | 5:20 | 3:43:58 |
| 42.195finish | 1:02 | 3:45:00 |
Marathon pace chart
Finish times every 5:00 from 2:30:00 to 6:00:00, with the even pace and speed each one takes over 42.195 km. The highlighted row is the nearest listed finish time, which may differ from your result.
| Finish | Per km | Per mile | km/h | mph |
|---|---|---|---|---|
| 2:30:00 | 3:33 | 5:43 | 16.88 | 10.49 |
| 2:35:00 | 3:40 | 5:55 | 16.33 | 10.15 |
| 2:40:00 | 3:48 | 6:06 | 15.82 | 9.83 |
| 2:45:00 | 3:55 | 6:18 | 15.34 | 9.53 |
| 2:50:00 | 4:02 | 6:29 | 14.89 | 9.25 |
| 2:55:00 | 4:09 | 6:40 | 14.47 | 8.99 |
| 3:00:00 | 4:16 | 6:52 | 14.06 | 8.74 |
| 3:05:00 | 4:23 | 7:03 | 13.68 | 8.5 |
| 3:10:00 | 4:30 | 7:15 | 13.32 | 8.28 |
| 3:15:00 | 4:37 | 7:26 | 12.98 | 8.07 |
| 3:20:00 | 4:44 | 7:38 | 12.66 | 7.87 |
| 3:25:00 | 4:52 | 7:49 | 12.35 | 7.67 |
| 3:30:00 | 4:59 | 8:01 | 12.06 | 7.49 |
| 3:35:00 | 5:06 | 8:12 | 11.78 | 7.32 |
| 3:40:00 | 5:13 | 8:23 | 11.51 | 7.15 |
| 3:45:00 | 5:20 | 8:35 | 11.25 | 6.99 |
| 3:50:00 | 5:27 | 8:46 | 11.01 | 6.84 |
| 3:55:00 | 5:34 | 8:58 | 10.77 | 6.69 |
| 4:00:00 | 5:41 | 9:09 | 10.55 | 6.55 |
| 4:05:00 | 5:48 | 9:21 | 10.33 | 6.42 |
| 4:10:00 | 5:55 | 9:32 | 10.13 | 6.29 |
| 4:15:00 | 6:03 | 9:44 | 9.93 | 6.17 |
| 4:20:00 | 6:10 | 9:55 | 9.74 | 6.05 |
| 4:25:00 | 6:17 | 10:06 | 9.55 | 5.94 |
| 4:30:00 | 6:24 | 10:18 | 9.38 | 5.83 |
| 4:35:00 | 6:31 | 10:29 | 9.21 | 5.72 |
| 4:40:00 | 6:38 | 10:41 | 9.04 | 5.62 |
| 4:45:00 | 6:45 | 10:52 | 8.88 | 5.52 |
| 4:50:00 | 6:52 | 11:04 | 8.73 | 5.42 |
| 4:55:00 | 6:59 | 11:15 | 8.58 | 5.33 |
| 5:00:00 | 7:07 | 11:27 | 8.44 | 5.24 |
| 5:05:00 | 7:14 | 11:38 | 8.3 | 5.16 |
| 5:10:00 | 7:21 | 11:49 | 8.17 | 5.07 |
| 5:15:00 | 7:28 | 12:01 | 8.04 | 4.99 |
| 5:20:00 | 7:35 | 12:12 | 7.91 | 4.92 |
| 5:25:00 | 7:42 | 12:24 | 7.79 | 4.84 |
| 5:30:00 | 7:49 | 12:35 | 7.67 | 4.77 |
| 5:35:00 | 7:56 | 12:47 | 7.56 | 4.7 |
| 5:40:00 | 8:03 | 12:58 | 7.45 | 4.63 |
| 5:45:00 | 8:11 | 13:10 | 7.34 | 4.56 |
| 5:50:00 | 8:18 | 13:21 | 7.23 | 4.49 |
| 5:55:00 | 8:25 | 13:32 | 7.13 | 4.43 |
| 6:00:00 | 8:32 | 13:44 | 7.03 | 4.37 |
Race distances are the official ones. A marathon is 42.195 km and a half is 21.0975 km. Typing 26.2 miles shortens the marathon by about 30 metres; 13.1 shortens the half by about 15 metres, which changes the finish time, so Race sets the official figure and any other distance can be typed in either unit. The splits assume an even pace: they are the plan for the day, not a prediction of it, and speed conversion does not model treadmill incline or road effort. The chart is the same arithmetic run across a whole range of finish times.
Common questions
- What is the difference between min/km and min/mile?
- They are the same speed on two rulers. A mile is 1.609344 km, so a pace per mile is the pace per kilometre multiplied by 1.609344: 5:20 per km is 8:35 per mile, and 8:00 per mile is 4:58 per km. The tool prints both every time, whichever one you typed, and switching the pace unit converts the number you entered rather than relabelling it.
- What does the calculator count as a marathon or a half marathon?
- The official distances: a marathon is 42.195 km and a half marathon is 21.0975 km. Those are 26.2188 and 13.1094 miles, so typing 26.2 or 13.1 shortens the course by about 30 metres or 15 metres, a handful of seconds at any pace. The Race seg sets the exact figure in whichever unit is selected, and a distance typed within a metre of an official one is recognised as that race.
- Are the splits even or negative?
- Even. Each complete kilometre or mile takes the same time; the finish row covers the remaining fraction. Long courses group several marks into each row. Variable, negative and run/walk splits need separate segment inputs and are not calculated here.
- What speed do I set the treadmill to?
- Pace converts to belt speed: 5:20 per km is 11.25 km/h or 6.99 mph. Speed to pace accepts either speed unit for the reverse conversion. This is a distance/time conversion; it does not adjust for incline, calibration, wind or physiological effort.
- How is the finish-time chart built?
- Each listed finish time is divided by the course distance. Preset charts cover 2:30–6:00 for a marathon, 1:15–3:00 for a half, 30:00–1:30 for 10K and 15:00–45:00 for 5K. Other courses use a generated comparison window around 3–9 minutes per km. The page states the actual displayed endpoints. The highlighted row is the nearest listed time within half a chart step; it can differ from your result. Extreme numeric scales may have no comparison chart.
- What formats does the time field accept?
- h:mm:ss such as 3:45:00, mm:ss such as 45:00, and letters such as 3h45m or 45m. A bare number is read as minutes, so 45 is 45:00. Pace takes m:ss such as 5:20, or 5m20s, or a decimal number of minutes such as 5.5. Seconds above 59, and minutes above 59 in h:mm:ss, are refused; in mm:ss the minutes may run past 59, so 75:30 is an hour and a quarter.
- Can this calculate cycling, walking or track pace?
- Yes for ordinary distance/time arithmetic: enter the total distance and time, or a constant pace and distance. A 400 m track interval is 0.4 km. The tool does not prescribe training intensity, predict performance from a previous race, aggregate separate laps, or model course conditions. Use Swim Pace Calculator for pace per 100 m or 100 yards.
Constant-pace arithmetic from supplied numbers, using browser numeric precision. Clocks round to seconds, distances to four decimals and speeds to two; conversions retain unrounded values. A half marathon is 21.0975 km.