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
Calorie Deficit Calculator
Calculates the daily calorie target you need to hit your weight loss goal within a chosen timeframe, given your current TDEE. Use it to translate a pounds-to-lose goal and a deadline into a concrete daily eating target.
Fill in the required fields to see your result.
Key differences
| Lean Body Mass Calculator | Calorie Deficit Calculator | |
|---|---|---|
| Category | Weight Loss | Weight Loss |
| Inputs required | 4 | 4 |
| Result | Lean Body Mass (lbs) | Daily Calorie Target (calories) |
| 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. | Calculates the daily calorie target you need to hit your weight loss goal within a chosen timeframe, given your current TDEE. Use it to translate a pounds-to-lose goal and a deadline into a concrete daily eating target. |