💪 Health & Fitness
Quick, formula-based fitness and nutrition calculators — work out your daily calories and macros, estimate body fat and ideal weight, plan protein and water intake, and gauge strength. Each uses an established formula and runs instantly in your browser. These are general estimates for information only, not medical advice.
BMR Calculator
Find your basal metabolic rate and daily calorie needs (TDEE).
Macro Calculator
Split your daily calories into protein, carbs and fat in grams.
One Rep Max Calculator
Estimate your one-rep max from a set, with training percentages.
Body Fat Calculator
Estimate body fat percentage with the U.S. Navy tape method.
Ideal Weight Calculator
Estimate ideal body weight from height with four classic formulas.
Protein Intake Calculator
Find your daily protein target in grams based on weight and goal.
Water Intake Calculator
Estimate how much water to drink each day from weight and activity.
Body Surface Area Calculator
Calculate body surface area with Mosteller, Du Bois and Haycock.