Health & Fitness Calculators
Health and fitness calculators to support your wellness goals.
Tracking physical health often starts with a handful of raw numbers — weight, height, body measurements — that only become useful once they're turned into a meaningful metric. This category translates those measurements into standard health and fitness indicators, so you can monitor progress and see where you stand relative to established reference ranges.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy circumference method and the BMI method, with body fat category, lean mass, and ideal body fat for your age.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) and see your cardiometabolic risk category using World Health Organization thresholds, with sex-specific bands and correct measurement guidance for men and women.
Water Intake Calculator
Calculate your personalized daily fluid target from body weight, age, exercise, climate, and pregnancy or breastfeeding status, based on NASEM Adequate Intake guidance and ACSM exercise fluid-replacement recommendations.
Protein Intake Calculator
Calculate your personalized daily protein target from body weight, age, activity level, and pregnancy or breastfeeding status, based on the IOM Recommended Dietary Allowance and the ISSN's position stand on protein and exercise.
Ideal Weight Calculator
Estimate your ideal body weight using four established medical formulas — Devine, Robinson, Miller, and Hamwi — plus the healthy weight range based on BMI, for your height and sex.
BMI Calculator
Calculate your Body Mass Index (BMI) using US, metric, or any other combination of height and weight units, with a visual gauge and healthy weight range.