Online tools
Free calculators for marathon training and race day: target paces, split tables, finish-time predictions and unit conversions.
Pace calculator
Enter a target finish time to get the average pace you need to hold.
Race distance
Target finish time
5:20
Average pace, min/km
8:35
Average pace, min/mile
Finish time predictor
Predict race times from one recent result using the Riegel formula (exponent 1.06).
A recent race
Target finish time
Predicted times
19:34
10 km
43:10
Half
1:30:00
Marathon
Marathon split table
Cumulative split times for a target marathon, every 5 km plus the halfway mark.
Target finish time
| Race distance | Split | Finish |
|---|---|---|
| 5 km | +28:26 | 28:26 |
| 10 km | +28:26 | 56:53 |
| 15 km | +28:26 | 1:25:19 |
| 20 km | +28:26 | 1:53:45 |
| Halfway | +6:15 | 2:00:00 |
| 25 km | +22:12 | 2:22:12 |
| 30 km | +28:26 | 2:50:38 |
| 35 km | +28:26 | 3:19:05 |
| 40 km | +28:26 | 3:47:31 |
| Finish | +12:29 | 4:00:00 |
Pace and speed converter
Convert between the pace and speed units runners use.
Pace and speed converter
Race distance
5:00
min/km
8:03
min/mile
12.00
km/h
7.46
mph
Estimates only: courses, weather and taper all move the needle on race day.