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
Training Zone Calculator
Calculate your personalized heart rate training zones using the Karvonen or percentage-of-max-HR method. Use it when structuring your weekly runs to target specific fitness adaptations.
Fill in the required fields to see your result.
Key differences
| Training Load Calculator | Training Zone Calculator | |
|---|---|---|
| Category | Running | Running |
| Inputs required | 4 | 4 |
| Result | Training Load Score (TSS) | Tempo Training Zone (bpm) |
| 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. | Calculate your personalized heart rate training zones using the Karvonen or percentage-of-max-HR method. Use it when structuring your weekly runs to target specific fitness adaptations. |