Free Fitness Calculators
Tools built on established fitness and nutrition formulas to help you understand your body and optimize your training.
Body
Understand your body composition and daily needs
BMI Calculator
Calculate your Body Mass Index to understand if your weight is in a healthy range for your height.
TDEE Calculator
Find out how many calories you burn daily based on your stats and activity level.
Macro Calculator
Get your optimal protein, carb, and fat targets based on your TDEE and fitness goal.
Deficit & Surplus Calculator
Fine-tune your calorie deficit or surplus and see a realistic weight projection over 24 weeks.
Protein Intake Calculator
Calculate your daily protein target and per-meal distribution based on your body and goals.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
FFMI Calculator
Calculate your Fat-Free Mass Index and see how close you are to your natural muscular potential.
Understand your body better
Whether you're just starting your fitness journey or optimizing your training, these calculators give you the data you need. All calculations use established, peer-reviewed formulas, and each calculator lists the exact formula and sources it is based on.