Free health and fitness calculators for BMI, calories, body fat, and more.

Adult BMI Calculator

Estimate adult body mass index from height and weight for a quick weight-status check.

BMI Calculator

Calculate your Body Mass Index (BMI) and find your weight category.

BMR Calculator

Estimate basal metabolic rate from age, sex, height, and body weight.

Body Fat Percentage Calculator

Estimate body fat percentage from standard body measurements and sex-specific formulas.

Calorie Calculator

Calculate your daily calorie needs based on your age, gender, weight, and activity level.

Cutting Calorie Calculator

Estimate daily calories for a fat-loss phase using BMR, activity level, and weight-management planning.

Daily Water Intake Calculator

Estimate a practical daily water target from body weight and exercise time.

Hydration Calculator

Estimate a practical daily water intake target from body weight and activity time.

Maintenance Calorie Calculator

Estimate maintenance calories from age, sex, body size, and activity level.

TDEE Calculator

Estimate total daily energy expenditure from age, sex, size, and activity level.

Water Intake Calculator

Estimate a daily water target from body weight and activity level.

Army Body Fat Calculator

Estimate body fat from circumference measurements using a practical tape-measure method.

Body Fat Calculator

Estimate your body fat percentage using body measurements.

Bulking Calorie Calculator

Estimate daily calorie needs for a muscle-gain phase using body stats and activity level.

Exercise Water Intake Calculator

Estimate a daily hydration target from body weight and exercise time.

Female BMR Calculator

Estimate female basal metabolic rate from age, weight, and height using a standard equation.

Male BMR Calculator

Estimate male basal metabolic rate from age, weight, and height using a standard equation.

Men BMI Calculator

Calculate BMI for men from weight and height using the standard body mass index formula.