Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Weight Loss
Body Fat Loss Calculator
Estimates how much fat versus muscle you'll lose reaching a target body fat percentage. Use it when planning a cut to protect lean mass and set realistic body composition goals.
Fill in the required fields to see your result.
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.
Key differences
| Body Fat Loss Calculator | Lean Body Mass Calculator | |
|---|---|---|
| Category | Weight Loss | Weight Loss |
| Inputs required | 4 | 4 |
| Result | Target Weight for Body Fat Goal (lbs) | Lean Body Mass (lbs) |
| What it does | Estimates how much fat versus muscle you'll lose reaching a target body fat percentage. Use it when planning a cut to protect lean mass and set realistic body composition goals. | 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. |