Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Fitness
Heart Rate Training Zones Calculator
Calculate your personalised heart rate training zones using the Karvonen heart rate reserve method, which factors in resting heart rate to give zones that actually reflect your cardiovascular fitness. Used by coaches and endurance athletes to keep aerobic, threshold, and VO2-max sessions in the right intensity bands.
Fill in the required fields to see your result.
Fitness
Calories Burned Running Calculator
Estimate calories burned during a run from body weight, duration, and average speed. A quick first-pass for runners tracking energy expenditure; uses a simplified linear formula rather than full MET-based equations.
Fill in the required fields to see your result.
Key differences
| Heart Rate Training Zones Calculator | Calories Burned Running Calculator | |
|---|---|---|
| Category | Fitness | Fitness |
| Inputs required | 4 | 3 |
| Result | Zone 3 Target HR (bpm) | Calories Burned (kcal) |
| What it does | Calculate your personalised heart rate training zones using the Karvonen heart rate reserve method, which factors in resting heart rate to give zones that actually reflect your cardiovascular fitness. Used by coaches and endurance athletes to keep aerobic, threshold, and VO2-max sessions in the right intensity bands. | Estimate calories burned during a run from body weight, duration, and average speed. A quick first-pass for runners tracking energy expenditure; uses a simplified linear formula rather than full MET-based equations. |