Health

Estimate your body fat percentage using the U.S. Army circumference-based tape-test method (AR 600-9) and compare against Army standards by age band.

Calculate your Body Mass Index (BMI) and understand your health status with our interactive tool.

Calculate your body fat percentage, body fat mass, and lean body mass using the U.S. Navy Method and BMI Method. Plan your fitness journey with our interactive tool.

Calculate your Body Surface Area (BSA) using the Mosteller and DuBois formulas from your height and weight.

Estimate your body type (ectomorph, mesomorph, or endomorph) using the wrist-circumference-to-height frame-size ratio.

Calculate your healthy weight range based on your height using the WHO healthy BMI band (18.5-25).

Free ideal weight calculator using Hamwi, Devine, Robinson & Miller formulas. Get your ideal body weight by height, age, and sex in seconds.

Calculate your lean body mass (fat-free mass) using the Boer, James, and Hume formulas from just your height, weight, and sex.

Calculate how much excess weight you're carrying above the healthy BMI ceiling, plus a realistic safe weight-loss timeline.

Calculate your waist-to-hip ratio (WHR) from two tape-measure readings and see how it compares to WHO health-risk categories for your sex.

Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor, Revised Harris-Benedict, and Katch-McArdle formulas.

Free cal to joule converter. Instantly convert calorie to joule, kcal to kJ, and food Calories to kilojoules with exact 4.184 factor.

Estimate your daily calorie needs using science-backed BMR equations. Plan weight loss, maintenance, or gain with our interactive calorie calculator.

Calculate calories burned during exercise using MET (Metabolic Equivalent of Task) values for common activities.

Calculate your recommended daily carbohydrate intake in grams based on your calorie needs and the Acceptable Macronutrient Distribution Range.

Calculate your recommended daily water intake based on your weight and activity level.

Calculate your recommended daily fat intake in grams based on your calorie needs and the Acceptable Macronutrient Distribution Range.

Calculate your daily protein, carbohydrate, and fat targets in grams based on your calorie needs and macro split preference.

Calculate your recommended daily protein intake in grams based on your body weight, activity level, and goal.

Calculate your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor BMR equation and an activity-multiplier breakdown.

Estimate your one-rep max (1RM) from a submaximal set using the Epley and Brzycki formulas, plus a training percentage table.

Estimate pace, time, and distance for running, walking, or biking. Includes multipoint calculations, converters, and finish time predictions.

Convert a daily step count into an estimated distance walked and calories burned, based on your height and weight.

Calculate your target heart rate training zone using the Karvonen method, based on your age and resting heart rate.

Estimate your VO2 max (aerobic fitness) from your age and resting heart rate using the Uth-Sorensen-Overgaard-Pedersen non-exercise formula.

Estimate the likely conception date range from a known due date or birth date, using the reverse of Naegele's Rule.

Calculate your estimated due date from your last period, conception date, IVF transfer date, or an ultrasound scan.

Predict your ovulation day and fertile window for your next few cycles based on your last period and average cycle length.

Predict your next several menstrual period start and end dates based on your last period and average cycle length.

Calculate your due date, current gestational age, and trimester milestones from your last menstrual period.

Calculate your recommended total pregnancy weight gain range and weekly gain rate based on your pre-pregnancy BMI, using IOM guidelines.

Convert between A1C percentage and estimated average glucose (eAG), in mg/dL or mmol/L, using the ADAG study formula -- works in both directions.

Estimate your blood alcohol concentration (BAC) using the Widmark formula. Informational only — not a breathalyzer substitute.

Enter a systolic and diastolic reading to see which American Heart Association blood pressure category it falls into -- Normal, Elevated, Hypertension Stage 1 or 2, or Hypertensive Crisis.

Estimate your kidney function using the race-free CKD-EPI 2021 creatinine equation for glomerular filtration rate (eGFR).