Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Weight Loss
Lean Body Mass Calculator
Calculates your lean body mass — the weight of everything except body fat — using your choice of three validated clinical formulas. Useful for setting protein targets, dosing medications by lean mass, or tracking body composition changes over time.
Fill in the required fields to see your result.
Weight Loss
Body Fat Loss Calculator
Estimates the target body weight you need to reach in order to hit a specific body fat percentage, accounting for potential muscle loss during a cut. Use it when planning a cutting phase to protect lean mass.
Fill in the required fields to see your result.
Key differences
| Lean Body Mass Calculator | Body Fat Loss Calculator | |
|---|---|---|
| Category | Weight Loss | Weight Loss |
| Inputs required | 4 | 4 |
| Result | Lean Body Mass (lbs) | Target Weight (lbs) |
| What it does | Calculates your lean body mass — the weight of everything except body fat — using your choice of three validated clinical formulas. Useful for setting protein targets, dosing medications by lean mass, or tracking body composition changes over time. | Estimates the target body weight you need to reach in order to hit a specific body fat percentage, accounting for potential muscle loss during a cut. Use it when planning a cutting phase to protect lean mass. |