Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Running
Training Load Calculator
Quantify your overall training stress each week by combining mileage, intensity, hard workout count, and years of experience. Use it to balance progression and recovery and avoid overtraining.
Fill in the required fields to see your result.
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.
Key differences
| Training Load Calculator | Marathon Time Predictor | |
|---|---|---|
| Category | Running | Running |
| Inputs required | 4 | 2 |
| Result | Training Load Score (TSS) | Predicted Marathon Time (minutes) |
| What it does | Quantify your overall training stress each week by combining mileage, intensity, hard workout count, and years of experience. Use it to balance progression and recovery and avoid overtraining. | 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. |