Health calculators 68 tools
BMI, calories, nutrition, fitness, pregnancy, heart and sleep calculators. Estimates only, not medical advice.
Body & weight 12
- Ideal weightDevine, Robinson, Miller and Hamwi
- Healthy weight rangeHealthy weight for your height
- Body fatUS Navy tape-measure method
- Lean body massBoer, James and Hume formulas
- FFMI calculatorFat-free mass index, normalised
- Waist-to-height ratioKeep your waist under half your height
- Waist-to-hip ratioWHO and Asian waist cut-offs
- Body surface areaMosteller and DuBois BSA formulas
- Body frame sizeSmall, medium or large frame
- Adjusted body weightIdeal weight plus 40% of the excess
- Relative fat massBody fat % from waist and height
- BMI calculatorWith Indian and WHO categories
Calories & metabolism 15
- Calorie calculatorDaily calories to lose, keep or gain
- BMR calculatorMifflin, Harris-Benedict, Katch-McArdle
- TDEE calculatorTotal calories you burn in a day
- Maintenance caloriesCalories to keep your weight steady
- Calorie deficitSafe daily calories to lose weight
- Calorie surplusDaily calories for steady weight gain
- Weight loss calculatorWhen you can reach your goal weight
- Weight gain calculatorTime and calories to reach your goal
- Weight goal dateCheck if your target date is realistic
- Resting energy (REE)Mifflin-St Jeor and FAO/WHO/UNU
- Thermic effect of foodCalories burned digesting your meals
- Walking caloriesCalories burned walking by pace
- Running caloriesCalories burned running a distance
- Cycling caloriesCalories burned cycling by speed
- Swimming caloriesCalories burned swimming by stroke
Nutrition & diet 10
- Protein intakeDaily protein by ICMR-NIN and activity
- Carb intakeDaily carbs in grams from your calories
- Fat intakeDaily fat, saturated fat and oil limits
- Macro calculatorProtein, carbs and fat split in grams
- Fibre intakeDaily fibre target and your gap
- Water intakeDaily water by weight, in glasses
- Hydration calculatorWater needs with exercise and heat
- Sugar intakeDaily sugar limit in grams and teaspoons
- Sodium and saltSalt to sodium, checked against WHO
- Caffeine intakeChai, filter coffee and your daily limit
Fitness & exercise 15
- Max heart rate220 − age and Tanaka formulas
- Target heart rateKarvonen method with resting pulse
- Heart rate zonesFive training zones from your age
- VO2 maxCooper run test or resting pulse
- Pace calculatorPace, time or distance in km or miles
- Running speedPace to km/h, mph and race times
- Race time predictorPredict 5K to marathon times
- Walking caloriesCalories burned walking by pace
- Running caloriesCalories burned running a distance
- Cycling caloriesCalories burned cycling by speed
- Swimming caloriesCalories burned swimming by stroke
- Workout volumeTotal lifting volume for a session
- One rep max (1RM)Estimate 1RM with a % load table
- Steps to kmConvert steps to km by your height
- Heart rate recoveryHow fast your pulse drops after exercise
Pregnancy & periods 9
- Due date calculatorFrom last period, conception or IVF
- Pregnancy weekHow many weeks pregnant you are
- Gestational ageBy last period, due date, scan or IVF
- Trimester calculatorYour trimester and its dates
- Conception dateFrom due date, last period or birth
- Ovulation calculatorOvulation date and fertile days
- Fertile windowYour most fertile days each cycle
- Period calculatorYour next 6 period dates
- Pregnancy weight gainHealthy gain range by week and BMI
Heart & sleep 9
- Temperature converterCelsius, Fahrenheit and Kelvin
- Blood pressure checkBP category: Indian or ACC/AHA
- Pulse pressureGap between your two BP numbers
- MAP calculatorAverage pressure in your arteries
- Heart rate recoveryHow fast your pulse drops after exercise
- Sleep calculatorBest bedtime or wake-up time
- Sleep durationHow many hours you slept
- Sleep debtHow much sleep you owe this week
- Pack-year calculatorSmoking pack-years, incl. bidis
Lifestyle 7
- Sleep calculatorBest bedtime or wake-up time
- Sleep durationHow many hours you slept
- Sleep debtHow much sleep you owe this week
- Pack-year calculatorSmoking pack-years, incl. bidis
- Alcohol unitsUnits and grams of alcohol in drinks
- Caffeine half-lifeHow much caffeine is left by bedtime
- Screen timeYour weekly and yearly screen hours