BMI Calculator

BMI Calculator works out your Body Mass Index (BMI) from your height and weight, and keeps a history of results on your phone.

Calculate

Set your height, date of birth and sex once, then enter your weight in metric (kg) or imperial (lb) units to calculate your BMI.

See your BMI on a gauge with its category, from severely underweight to obese class 3, using the standard adult BMI ranges.

See the healthy weight range for your height (BMI 18.5 to 24.9) and how far you are from it.

Optional Asian-Indian BMI ranges (healthy 18.0 to 22.9, overweight from 23), if you prefer them to the WHO ranges.

A reference table shows every BMI category with yours highlighted.

More estimates

Estimated daily energy needs (TDEE and EER) and resting energy (BMR, Mifflin-St Jeor) for your activity level, plus estimated body-fat percentage (Deurenberg). Each figure names its formula. Date of birth and sex are used only for these estimates, never for your BMI.

History and trends

Every calculation is saved on your device, grouped by month, with the change since your last reading.

Trend charts of your BMI or weight over 30 days, 90 days, a year, or all your readings, with your current value, change and average.

Export your history to CSV whenever you want a copy.

Settings

Metric or imperial units, light or dark theme, and WHO or Asian-Indian BMI ranges. Delete all your data from the app at any time.

About BMI

BMI is a screening measure for adults. It does not measure body fat directly and may not suit everyone, for example athletes, pregnant women, older adults and people under 18.

This app is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Always consult a healthcare professional for medical advice, diagnosis, or treatment.

No account is needed. Your readings and profile stay on your device.