BMI Calculator
Compute Body Mass Index from weight in kilograms and height in meters or centimeters. Educational screening metric only—not a diagnosis.
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Use wellness and fitness formulas to make better health decisions quickly.
Quick answer
Health tools estimate metrics such as BMI, BMR, calories, or body-fat proxies from height, weight, age, sex, and activity inputs you provide.
They apply published predictive equations and show assumptions so you can understand what is being modeled.
Treat every health number as educational screening—not a diagnosis, prescription, or substitute for a clinician when symptoms or risk matter.
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Jump into popular health topics to find the right calculator quickly.
Calorie Calculator
Estimate total daily energy expenditure (maintenance calories) from age, sex, height, weight, and typical activity—using Mifflin–St Jeor BMR × standard activity multipliers.
Open CalculatorBMR Calculator
Estimate basal metabolic rate (calories at rest) from weight, height, age, and sex using the Mifflin–St Jeor equation—common in apps and coaching tools.
Open CalculatorBody Fat Calculator
Estimate body fat percentage from weight, height, age, and sex using a BMI-based regression model—useful for trends, not a lab replacement.
Open CalculatorIdeal Weight Calculator
Estimate ideal body weight using height-based formula.
Open CalculatorWater Intake Calculator
Estimate daily water intake from body weight.
Open CalculatorPregnancy Calculator
Estimate due date based on last menstrual period.
Open CalculatorOvulation Calculator
Estimate ovulation day from average cycle length.
Open CalculatorHeart Rate Calculator
Estimate target heart rate using age and workout intensity.
Open CalculatorLean Body Mass Calculator
Estimate lean body mass using total weight and body fat percentage.
Open CalculatorWaist to Hip Ratio Calculator
Calculate waist-to-hip ratio from waist and hip measurements.
Open CalculatorMacro Calculator
Estimate daily macro calorie totals from protein, carbs, and fats.
Open CalculatorTDEE Calculator
Estimate total daily energy expenditure.
Open CalculatorProtein Intake Calculator
Estimate daily protein needs based on body weight.
Open CalculatorBMI Prime Calculator
Calculate BMI prime score from BMI value.
Open CalculatorHeart Risk Score Calculator
Estimate a simple heart risk score from core markers.
Open CalculatorBody Water Calculator
Estimate total body water from body weight.
Open CalculatorVisceral Fat Estimate Calculator
Estimate an abdominal adiposity proxy score from gender, age, weight, height, waist, and thigh circumferences. For education only; not a medical diagnosis.
Open CalculatorOne Rep Max Calculator
Estimate one-rep max from lifted weight and repetitions.
Open CalculatorRunning Pace Calculator
Calculate running or walking pace.
Open CalculatorVO2 Max Calculator
Estimate VO2 max from 12-minute test distance.
Open CalculatorMAP Calculator
Calculate mean arterial pressure from blood pressure values.
Open CalculatorGlycemic Load Calculator
Estimate glycemic load from GI and carbohydrate grams.
Open CalculatorSleep Cycle Calculator
Estimate optimal wake time using sleep cycles.
Open CalculatorTarget Weight Time Calculator
Estimate time needed to reach target body weight.
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