Body Composition Calculators
Simple measures of body size and weight. Useful as a starting point, and most useful when you know their limits.
Body composition
BMI Calculator
Body mass index, your category and a healthy weight range.
24.7BMI
Body composition
Ideal Weight Calculator
Your ideal weight by four clinical formulas and BMI.
72–77kg
Guides to go with your numbers
All articlesHow to Lower Your Body Fat Percentage
Lowering body fat is not the same as losing weight. The goal is to lose fat while keeping, or even building, muscle. Here is how to do both.
Read the articleBulking vs Cutting: What's the Difference?
Bulking means eating in a surplus to build muscle; cutting means eating in a deficit to lose fat. Which one you should do first depends on where you are starting from.
Read the articleHow to Build Muscle: A Science-Based Guide for Beginners
Muscle grows when you train hard enough, eat enough protein and energy, and recover. Here is how much of each you need, based on the research, with a simple plan to start.
Read the articleMore calculators
- Nutrition CalculatorsWhat to eat, and how much of it. These calculators turn your body and goal into daily targets for protein, calories, macros and fluids.
- Training & Strength CalculatorsNumbers for the gym floor. Estimate your maximal strength without testing it, and plan the weights for every set.