How do I calculate pace for a 24-hour race?
Divide the full 24 hours by the target distance to get overall average pace including every stop. For a moving-only scenario, subtract an estimate of longer non-moving time first.
Pace, laps and hourly targets
Timed Ultramarathon Pace Calculator
Turn a distance target into overall pace, moving pace, whole-lap requirements and an hour-by-hour table for 24-hour, 48-hour and multiday events.
Quick scenarios
Scenarios change distance, duration and split interval. They keep your entered stopped time. The initial one-hour allowance is an editable example, not a recommendation for any race duration.
Race scenario
Every output is a planning calculation, not a performance forecast.
Printable race plan
Timed-Race Targets
160.93 km / 100.00 miles across 24 hours; 1 hour stopped
Overall pace
8:57/km
14:24/mi · includes every stop
Moving pace
8:34/km
13:48/mi across moving time
Hourly target
6.71 km
4.17 miles
Exact laps
160.93
1,000 m per lap
Whole laps needed
161
161.00 km completed
Available moving time
23.00h
1.00h planned non-moving
| Elapsed | Kilometres | Miles | Exact laps | Completed laps |
|---|---|---|---|---|
| 1:00 | 6.71 | 4.17 | 6.71 | 6 |
| 2:00 | 13.41 | 8.33 | 13.41 | 13 |
| 3:00 | 20.12 | 12.50 | 20.12 | 20 |
| 4:00 | 26.82 | 16.67 | 26.82 | 26 |
| 5:00 | 33.53 | 20.83 | 33.53 | 33 |
| 6:00 | 40.23 | 25.00 | 40.23 | 40 |
| 7:00 | 46.94 | 29.17 | 46.94 | 46 |
| 8:00 | 53.64 | 33.33 | 53.64 | 53 |
| 9:00 | 60.35 | 37.50 | 60.35 | 60 |
| 10:00 | 67.06 | 41.67 | 67.06 | 67 |
| 11:00 | 73.76 | 45.83 | 73.76 | 73 |
| 12:00 | 80.47 | 50.00 | 80.47 | 80 |
| 13:00 | 87.17 | 54.17 | 87.17 | 87 |
| 14:00 | 93.88 | 58.33 | 93.88 | 93 |
| 15:00 | 100.58 | 62.50 | 100.58 | 100 |
| 16:00 | 107.29 | 66.67 | 107.29 | 107 |
| 17:00 | 114.00 | 70.83 | 114.00 | 113 |
| 18:00 | 120.70 | 75.00 | 120.70 | 120 |
| 19:00 | 127.41 | 79.17 | 127.41 | 127 |
| 20:00 | 134.11 | 83.33 | 134.11 | 134 |
| 21:00 | 140.82 | 87.50 | 140.82 | 140 |
| 22:00 | 147.52 | 91.67 | 147.52 | 147 |
| 23:00 | 154.23 | 95.83 | 154.23 | 154 |
| 1d 0:00 | 160.93 | 100.00 | 160.93 | 160 |
Targets assume perfectly even progress. Fatigue, terrain, weather, aid access, sleep loss and medical risk are outside the model. Use conservative ranges and stop for warning signs regardless of the table.
Overall Pace and Moving Pace Answer Different Questions
Overall pace divides every minute on the event clock by the target distance. Moving pace removes all the non-moving time you enter, while ordinary walking remains part of movement. Enter distance directly in kilometres or miles; switching units converts your existing target. Include every expected stop in hours and revisit the allowance when changing race duration.
Use Whole Laps for Course Operations
Measured loop races often record full laps plus a final partial distance according to event procedure. The calculator shows exact and rounded-up lap counts, but the organizer's timing rules determine how partial distance is actually measured.
Read the 24-hour pacing guide before turning an even-split table into a race plan.
Frequently Asked Questions
How many laps do I need?
Divide the target distance by the measured loop length. The exact result may include a partial lap; the whole-lap target rounds upward and shows the resulting completed distance.
What does planned non-moving time include?
Enter the combined stationary time in hours, including aid, foot care, clothing changes, rest and sleep. For example, 0.5 hours is 30 minutes. Ordinary walking remains moving time. The initial one-hour value is an editable example, not a sleep recommendation; scenario buttons preserve your entered value.
Is the hourly table a race prediction?
No. It distributes the target evenly across the clock. Fatigue, weather, terrain, congestion and physical problems can make actual progress substantially uneven.