Health calculators
BMI with Indian cut-offs, daily calories, pregnancy due date and fertile days.
- BMI calculator170 cm, 70 kg: 24.2, overweight on Indian cut-offs
- Calorie calculatorMan, 30, 170 cm, 70 kg, moderately active: 2,507 kcal a day
- Due date calculatorLast period 1 January 2026: due 8 October 2026
- Ovulation calculator28-day cycle from 1 October: fertile 10–15 October
Which one should I use?
- BMI calculator — whether your weight is in a healthy range for your height (details below).
- Calorie calculator — how many calories a day keep your weight steady (TDEE), and a target to lose or gain.
- Due date calculator — for when you are pregnant: your expected delivery date, week and trimester.
- Ovulation calculator — for when you are trying to conceive: your fertile days and next period.
The BMI calculator divides your weight in kg by your height in metres, squared. You can enter height in feet and inches too.
It uses the Asian-Indian cut-offs from Indian consensus guidelines:
- below 18.0 — underweight
- 18.0 to 22.9 — normal
- 23 to 24.9 — overweight
- 25 and above — obese
These are lower than the WHO global ranges, because health risks tend to start at a lower BMI for many Indians. The calculator shows the WHO categories too, for comparison.
Enter your weight and height to see your BMI, and your category on both the Asian-Indian and the WHO scale.
What BMI can and can't tell you
BMI compares your weight with your height. It is quick and free, so doctors use it as a first check. But it does not measure body fat. It cannot tell muscle from fat, so a muscular person may show as overweight. It also misses where fat sits. Fat around the belly carries more health risk than fat on the hips. BMI is less useful during pregnancy and in older people. Children are measured against age and sex charts instead.
Why Indian cut-offs are lower
Studies found that many Indians develop diabetes, high blood pressure and heart disease at a lower BMI than Europeans. At the same BMI, Indians tend to carry more body fat, and more of it around the belly. So a 2009 Indian consensus statement set overweight at 23 and obese at 25, instead of the WHO's 25 and 30.
When to see a doctor
Talk to a doctor if your BMI is outside the normal range, or your weight changes a lot without trying. See one before you start a strict diet or a new exercise plan too. A doctor can also check your waist size, blood pressure and blood sugar, which tell you more than BMI alone.
For general information only, not medical advice. Talk to a doctor about your health.