Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Running
Marathon Time Predictor
Predict your marathon finish time from a recent 5K, 10K, or half marathon result using empirical scaling factors tuned to typical recreational runners. Use it to set a realistic goal before your first marathon or to validate a training cycle.
Fill in the required fields to see your result.
Running
Race Finish Time Calculator
Predict your total race finish time from distance and your planned pace per kilometre. Essential for pacing strategy before a 5K, 10K, half-marathon, or marathon.
Fill in the required fields to see your result.
Key differences
| Marathon Time Predictor | Race Finish Time Calculator | |
|---|---|---|
| Category | Running | Running |
| Inputs required | 2 | 3 |
| Result | Predicted Marathon Time (minutes) | Finish Time (minutes) |
| What it does | Predict your marathon finish time from a recent 5K, 10K, or half marathon result using empirical scaling factors tuned to typical recreational runners. Use it to set a realistic goal before your first marathon or to validate a training cycle. | Predict your total race finish time from distance and your planned pace per kilometre. Essential for pacing strategy before a 5K, 10K, half-marathon, or marathon. |