Health Calculators
Evidence-based fitness and health calculators: BMI, body fat, calories, macros, pregnancy, heart-rate zones and more — with metric and imperial support.
Anorexic BMI Calculator
Screen BMI against the tiers used when assessing anorexia nervosa in adults.
CalculateArmy Body Fat Calculator
One-site U.S. Army tape test (2023) with the age/gender max body fat standards.
CalculateBAC Calculator
Estimated blood alcohol concentration via Widmark with time decay and limits.
CalculateBMI Calculator
Calculate Body Mass Index, weight category and healthy weight range for your height.
CalculateBMR Calculator
Basal metabolic rate via Mifflin-St Jeor with Harris-Benedict and a TDEE table.
CalculateBody Fat Calculator
Estimate body fat % with the U.S. Navy tape method plus the BMI-based fallback.
CalculateBody Surface Area Calculator
Compute body surface area (BSA) with Mosteller plus seven other published formulas.
CalculateBody Type Calculator
Classify body shape from bust/waist/hip measurements and compute waist-hip ratio.
CalculateCalorie Calculator
Daily calorie targets to lose, maintain or gain weight based on your TDEE.
CalculateCalories Burned Calculator
Calories burned during exercise and daily activities using MET values, duration and body weight.
CalculateCarbohydrate Calculator
Daily carbohydrate grams from your calorie needs, from low-carb to high-carb.
CalculateConception Calculator
Most fertile days, fertile window and due date from your last period and cycle.
CalculateDue Date Calculator
Estimated delivery date from last period, conception date or IVF transfer, with milestone timeline.
CalculateFat Intake Calculator
Daily fat target in grams from your TDEE (20–35% of calories) with a saturated-fat limit.
CalculateGFR Calculator
Estimated glomerular filtration rate via CKD-EPI, MDRD and Mayo formulas.
CalculateHealthy Weight Calculator
Healthy body-weight range for your height (BMI 18.5–24.9) plus weight thresholds for every BMI band.
CalculateIdeal Weight Calculator
Ideal body weight from four classic formulas (Robinson, Miller, Devine, Hamwi) plus the BMI range.
CalculateLean Body Mass Calculator
Estimated lean body mass and body-fat percentage via Boer, James and Hume formulas.
CalculateMacro Calculator
Daily protein, carb and fat grams with donut chart and per-meal breakdown.
CalculateOne Rep Max Calculator
Estimate your 1RM from any weight × reps set (Epley, Brzycki, Lombardi) with a %1RM training-load table.
CalculateOverweight Calculator
Check whether your weight is under, within or above the healthy range for your height.
CalculateOvulation Calculator
Predict ovulation date, fertile window and next period from your cycle.
CalculatePace Calculator
Running pace per km/mile, speed, and predicted race finish times.
CalculatePeriod Calculator
Predict your next period start dates, ovulation day and fertile window from your last cycle.
CalculatePregnancy Calculator
Gestational age, due date, trimester dates and pregnancy milestones from LMP, due date or conception.
CalculatePregnancy Conception Calculator
Estimate the date of conception and the possible intercourse window from a due date or last period.
CalculatePregnancy Weight Gain Calculator
IOM recommended weight-gain ranges by pre-pregnancy BMI and current pregnancy week.
CalculateProtein Calculator
Daily protein target in grams per kg of body weight for your activity level and goal.
CalculateTarget Heart Rate Calculator
Karvonen training zones (50–100% intensity) from your age, max heart rate and resting heart rate.
CalculateTdee Calculator
Total daily energy expenditure from Mifflin-St Jeor BMR, plus goal calories for cut, maintain or bulk.
CalculateWeight Watcher Points Calculator
Food point values for the WW point systems (SmartPoints, PointsPlus, original) from nutrition facts.
Calculate