Calculators to help you build muscle
7 tools matched to this goal.
Body Fat Calculator (US Navy)
Estimate body fat percentage from tape measurements.
Lean Body Mass Calculator
Split your weight into lean mass and fat mass.
TDEE & Daily Calorie Calculator
Total daily energy expenditure at each activity level.
Macro Calculator
Protein, carb and fat grams for your calorie target.
Protein Intake Calculator
Daily protein range for your weight and goal.
Weight Gain Calculator
Calories and timeline to gain weight steadily.
One-Rep Max Calculator
Estimate your max lift from a lighter set.
Other goals
- Lose weight
- Build muscle
- Eat better
- Get fitter
- Protect my heart
- Manage blood sugar
- Pregnancy & fertility
- Care for my child
- Sleep better
- Mental wellbeing
- Cut back on drink, smoke & caffeine
- Understand my lab results
Related guides
Weight & Body Composition
Body Fat Percentage Explained
What counts as lean, average or high body fat, and how to estimate yours at home.
Weight & Body CompositionHow Many Calories Should You Eat to Lose Weight?
Work out a deficit that is effective without being extreme.
Weight & Body CompositionCan You Build Muscle While Losing Fat?
Body recomposition is possible, especially for beginners. Here is the approach.