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Health & Fitness Calculators
BMI, calories, weight & pregnancy tools
calendar_monthBiological Age CalculatorEstimate your biological age from your lifestyle — diet, exercise, sleep, smoking, alcohol and stress — compared with your calendar age.monitor_weightBMI CalculatorCalculate your Body Mass Index from weight and height, see your category, and the healthy weight range for your height.monitor_heartBMR CalculatorCalculate your Basal Metabolic Rate with the Mifflin-St Jeor and Katch-McArdle formulas — the calories you burn at complete rest.accessibility_newBody Fat Percentage CalculatorEstimate your body fat percentage with the US Navy method from your height and waist, neck (and hip) measurements — plus your fat and lean mass.checkroomBra Size CalculatorFind your bra size from just two tape measurements — underbust and bust — using the US modern or traditional +4 method.restaurantCalorie Calculator (BMR & TDEE)Find your daily calorie needs — BMR, TDEE and calories for losing, maintaining or gaining weight.monitor_weight_lossCalorie Deficit CalculatorWork out your daily calorie deficit, the intake you need to hit it, and how quickly you will lose weight — based on your TDEE.monitor_heartCreatinine Clearance CalculatorEstimate creatinine clearance (CrCl) with the Cockcroft-Gault formula from age, weight, gender and serum creatinine.pregnant_womanEDD Calculator (Estimated Due Date)Calculate your estimated due date adjusted for your menstrual cycle length using Naegele's rule.monitor_heartHeart Rate from ECG CalculatorCalculate heart rate in beats per minute (BPM) from an ECG strip using the RR interval or count method.accessibility_newIdeal Weight CalculatorEstimate your ideal body weight from height and gender using Devine, Robinson, Miller or Hamwi formulas.restaurantMacros CalculatorWork out your daily protein, fat and carbohydrate targets in grams from your TDEE and your fitness goal.local_fire_departmentMaintenance Calories CalculatorFind the calories needed to maintain your weight from BMR and activity level, plus targets for cutting and bulking.favoriteMax Heart Rate CalculatorEstimate your maximum heart rate with the classic 220−age or the more accurate Tanaka formula, with all five training zones.pregnant_womanOvulation CalculatorFind your ovulation date and fertile window from your last period and cycle length, with your next period date too.favoritePregnancy Due Date CalculatorFind your due date, gestational age and trimester from your last menstrual period (LMP).child_friendlyPregnancy Week CalculatorFind your pregnancy week, trimester and due date from your last period — or work backwards from a due date.restaurantProtein Intake CalculatorFind your ideal daily protein intake based on your weight, activity level and fitness goal.local_fire_departmentTDEE CalculatorFind your Total Daily Energy Expenditure — the exact calories you burn each day — from BMR and activity level, with lose and gain targets.directions_runVO2 Max CalculatorEstimate your VO2 max — your aerobic fitness — from your resting heart rate, with fitness categories for men and women.activity_zoneZone 2 Heart Rate CalculatorFind your Zone 2 heart rate range — the fat-burning aerobic zone — as a percentage of max HR or with the Karvonen method.