Health & Fitness
Estimate everyday health and fitness metrics with clear inputs and results.
Water Intake Calculator
Use the free Water Intake Calculator directly in your browser. Fast, private, and easy to use with no account required.
Breathing Exercises
Use the free Breathing Exercises directly in your browser. Fast, private, and easy to use with no account required.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) — the minimum calories your body needs at complete rest. Uses the accurate Mifflin-St Jeor equation.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) — total calories burned per day including activity, NEAT, and digestion. Your true maintenance calorie level.
Body Fat Calculator
Estimate body fat percentage and lean body mass using the U.S. Navy circumference method. More accurate than BMI for assessing body composition.
Calorie Calculator
Estimate your daily calorie needs to maintain, lose, or gain weight based on body stats and activity level. Uses the Mifflin-St Jeor formula.
Universal BMI Calculator
Calculate Body Mass Index (BMI) with both Imperial (lbs/feet) and Metric (kg/cm) units.
Running Pace Calculator
Calculate running pace, finish time, and distance for 5k, 10k, half marathon, and marathon.
Ideal Weight Calculator
Calculate your healthy ideal weight range using 4 clinical medical formulas (Devine, Robinson, Miller, Hamwi) and WHO BMI guidelines.
Macro Calculator
Calculate your daily macronutrient breakdown (protein, carbs, fats) and calorie targets for weight loss, maintenance, or muscle gain.
Pregnancy Due Date Calculator
Estimate your baby delivery due date, current gestational age, trimesters, and key developmental milestones from LMP, conception, or IVF.