Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
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.
Key differences
| Training Zone Calculator | Training Load Calculator | |
|---|---|---|
| Category | Running | Running |
| Inputs required | 4 | 4 |
| Result | Tempo Training Zone (bpm) | Training Load Score (TSS) |
| What it does | 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. | 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. |