Fitness Tools
Calculators & Trackers
Science-backed formulas used by trainers and nutritionists. Completely free, no signup required.
BMI Calculator
Calculate your Body Mass Index and understand what it means for your health
TDEE Calculator
Find your Total Daily Energy Expenditure to optimize calorie intake for any goal
One Rep Max
Estimate your 1RM from any set using 5 proven scientific formulas
Macro Calculator
Get your optimal protein, carb, and fat split based on your goals
Body Fat %
Estimate body fat percentage using the US Navy measurement method
Plate Loader
Visual barbell plate calculator — see exactly which plates to load per side