Health calculators
BMI and body measures with plain readings, including cut-offs for Asian populations.
37 calculators · every one shows its working
- BMI CalculatorBody mass index in metric or imperial, with WHO bands and the lower cut-offs for Asian populations.
- Calorie CalculatorDaily calories to keep, lose or gain weight, from the Mifflin-St Jeor formula and your activity level.
- Pregnancy Due Date CalculatorEstimated due date, weeks pregnant and trimester from the first day of your last period.
- Body Fat CalculatorBody fat percentage from a tape measure using the US Navy method, with fat and lean mass.
- Ideal Weight CalculatorIdeal weight for your height from four classic formulas, beside the healthy BMI range.
- Water Intake CalculatorHow much water to drink a day for your weight, exercise and climate.
- Ovulation CalculatorYour likely ovulation day, fertile window and next period, for the next three cycles.
- Heart Rate Zone CalculatorMaximum heart rate and the five training zones, using your resting pulse if you know it.
- Sleep CalculatorWhen to go to bed or set your alarm so you wake at the end of a 90-minute sleep cycle.
- Running Pace CalculatorYour pace per km and per mile, speed, and finish times for a 5K, 10K, half and full marathon.
- Calories Burned CalculatorCalories burned walking, running, cycling, swimming, cricket and more, from your weight and time.
- Waist-to-Height Ratio CalculatorYour waist-to-height ratio, a simple check of health risk from belly fat.
- Pregnancy Weight Gain CalculatorHow much weight to gain in pregnancy for your starting BMI, and the typical gain by this week.
- Blood Pressure CalculatorWhat your blood pressure reading means, from normal to stage 2 and crisis, with what to do next.
- Macro CalculatorDaily grams of protein, carbohydrate and fat for your calorie target, per day and per meal.
- Steps to Kilometres CalculatorHow far your steps take you, the walking time and the calories burned, from your height.
- Smoking Cost CalculatorWhat smoking costs you a month, a year and over ten years, from your daily cigarettes and pack price.
- Child Height PredictorPredict a child's adult height from the parents' heights, using the mid-parental method doctors use.
- Lean Body Mass CalculatorYour lean body mass and estimated body fat from height and weight, using the Boer formula.
- Protein Intake CalculatorHow much protein you need a day for your weight and goal, and per meal.
- Period CalculatorWhen your next periods are due for the next six months, with the likely ovulation day before each.
- Weight Loss CalculatorWhen you'll reach your goal weight at a daily calorie deficit, and how fast you'll lose.
- Conception Date CalculatorWork out the likely date of conception from the due date or the last period.
- Baby Age CalculatorYour baby's age in months, weeks and days, with corrected age for babies born early.
- Blood Sugar Converter and HbA1c CalculatorConvert blood sugar between mg/dL and mmol/L, see what a reading means, and turn HbA1c into average sugar.
- Cholesterol CalculatorWhat your cholesterol and triglyceride results mean, with mg/dL and mmol/L units and the total-to-HDL ratio.
- BMR CalculatorYour basal metabolic rate and daily calorie burn (TDEE) by the Mifflin-St Jeor, Harris-Benedict and Katch-McArdle formulas.
- One Rep Max CalculatorEstimate your one-rep max from any set, with training weights for each percentage.
- eGFR CalculatorKidney function (eGFR) from creatinine, age and sex with the CKD-EPI 2021 equation, and the CKD stage.
- Race Time Predictor (5K, 10K, Half Marathon, Marathon)Predict your time for another race distance from a recent race, with the pace you'd need.
- Waist-to-Hip Ratio CalculatorYour waist-to-hip ratio against the WHO risk marks for men and women, with your waist on its own.
- Caffeine CalculatorHow much caffeine is still in your body at bedtime, and when it drops low enough not to matter.
- Intermittent Fasting CalculatorYour eating window and fasting times for 16:8, 18:6, 20:4 and other plans.
- VO2 Max CalculatorEstimate your VO2 max from a 12-minute run or from your resting and maximum heart rate.
- Dog and Cat Calorie CalculatorDaily calories for your dog or cat, and how many grams of their food that is.
- Baby Formula CalculatorHow much formula milk a baby usually needs a day and at each feed, from their weight.
- Next Blood Donation Date CalculatorWhen you can give blood again, from your last donation and your blood service's rules.