Health & Fitness Calculators
7 free calculators — all 50 states
BMI, TDEE, calorie, and macro calculators for health and fitness planning.
All Calculators
BMI Calculator
Calculate your Body Mass Index (BMI) and find your healthy weight range. Free BMI calculator for adults using height and weight.
Body Fat Calculator
Calculate your body fat percentage using the U.S. Navy method. Get your lean mass, fat mass, and fitness category with just a tape measure.
Calorie Deficit Calculator
Calculate your ideal calorie deficit for safe, sustainable weight loss. Get personalized daily calories, macro targets, and a realistic timeline.
Ideal Weight Calculator
Calculate your ideal body weight using multiple medical formulas (Devine, Robinson, Miller, Hamwi). Compare results by height, age, sex, and frame size.
Macro Calculator
Calculate your ideal macronutrient split for weight loss, muscle gain, or maintenance. Get personalized protein, carb, and fat targets in grams and calories.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and recommended macros. Uses the Mifflin-St Jeor equation for accurate BMR estimation.
Water Intake Calculator
Calculate how much water you need daily based on weight, activity level, and climate. Get personalized hydration targets in ounces and liters.
About Health & Fitness Calculators
BMI, TDEE, calorie, and macro calculators for health and fitness planning. All 7 calculators are free to use, require no sign-up, and provide instant results based on verified data from official government agencies.
Each calculator includes a detailed methodology section explaining the formulas used, data sources cited with verification dates, and frequently asked questions to help you understand the results. Results are shareable and print-friendly.