Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Health
Heart Rate Training Zones Calculator
Finds your target heart rate for each training zone using either the simple percentage-of-max method or the more precise Karvonen formula. Use it to structure cardio workouts for fat burning, aerobic base, or peak performance.
Fill in the required fields to see your result.
Health
Waist-to-Hip Ratio Calculator
Divides your waist circumference by your hip circumference to gauge how body fat is distributed — a strong, simple predictor of cardiometabolic risk. A higher ratio indicates more abdominal ("apple-shaped") fat, which carries greater health risk than fat stored on the hips and thighs.
Fill in the required fields to see your result.
Key differences
| Heart Rate Training Zones Calculator | Waist-to-Hip Ratio Calculator | |
|---|---|---|
| Category | Health | Health |
| Inputs required | 4 | 2 |
| Result | Target Heart Rate (bpm) | Waist-to-Hip Ratio |
| What it does | Finds your target heart rate for each training zone using either the simple percentage-of-max method or the more precise Karvonen formula. Use it to structure cardio workouts for fat burning, aerobic base, or peak performance. | Divides your waist circumference by your hip circumference to gauge how body fat is distributed — a strong, simple predictor of cardiometabolic risk. A higher ratio indicates more abdominal ("apple-shaped") fat, which carries greater health risk than fat stored on the hips and thighs. |