Health & Fitness calculators.
BMI, daily calorie needs, and other health metrics to help you understand your body and set realistic, healthy goals.
BMI Calculator
Calculate your body mass index (BMI), see your category on a WHO chart, and find your healthy weight range — metric or imperial.
Calorie Calculator
Estimate your daily calorie needs (BMR & TDEE) and get a goal-adjusted target to lose, maintain, or gain weight.
BMR Calculator
Estimate your basal metabolic rate with the Mifflin-St Jeor and Harris-Benedict formulas — see your BMR and daily calorie needs at every activity level.
One Rep Max Calculator
Estimate your one-rep max (1RM) from any weight and rep range using the Epley and Brzycki formulas, plus a training percentage chart for your lifts.
Macro Calculator
Find your daily protein, carb, and fat targets from your TDEE and goal — based on the Mifflin-St Jeor formula, with adjustable macro splits.