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What is a BMI Calculator?
A BMI calculator — or Body Mass Index calculator — measures your body weight relative to your height to determine whether you fall in a healthy weight range. This free BMI checker for men and women uses the standard formula: BMI = Weight (kg) ÷ Height (m)².
BMI is one of the most widely used health screening tools by doctors worldwide. While it doesn't directly measure body fat, it provides a reliable first-step indicator of weight-related health risks for most adults.
For Indian and South Asian adults, health organisations recommend using slightly lower BMI cutoffs — Indian consensus guidelines treat BMI 23–24.9 as overweight and 25 or above as obese (compared with 25 and 30 in the global WHO scale), and a 2025 Indian expert revision goes further, defining obesity from BMI 23 and grading it by waist size and health effects. This calculator uses the Indian cut-offs.
BMI Categories — Indian & Global Standards
18.5 – 22.9
Healthy Weight
23 – 24.9
Overweight (India)
Note: Global WHO standards use 25 for overweight and 30 for obese. Indian guidelines use lower thresholds because South Asians tend to carry more body fat, especially around the waist, at the same BMI. WHO also suggests 23 and 27.5 as public-health action points for Asian populations.
Height vs Weight — Ideal Weight Reference Table
This height vs weight calculator reference shows the healthy and ideal weight range for common heights:
| Height | Healthy Weight Range | Ideal Weight (BMI 22) | For |
|---|
| 150 cm (4'11") | 41.6 – 51.6 kg | 49.5 kg | Men & Women |
| 155 cm (5'1") | 44.4 – 55.0 kg | 52.8 kg | Men & Women |
| 160 cm (5'3") | 47.4 – 58.6 kg | 56.3 kg | Men & Women |
| 165 cm (5'5") | 50.3 – 62.4 kg | 59.9 kg | Men & Women |
| 170 cm (5'7") | 53.5 – 66.3 kg | 63.6 kg | Men & Women |
| 175 cm (5'9") | 56.7 – 70.3 kg | 67.4 kg | Men & Women |
| 180 cm (5'11") | 60.0 – 74.4 kg | 71.3 kg | Men |
| 185 cm (6'1") | 63.3 – 78.6 kg | 75.4 kg | Men |
Healthy weight range based on the Indian cut-off of BMI 18.5–22.9. Ideal weight based on BMI 22.
How to Use This BMI Checker
1
Enter your current weight in kilograms.
2
Enter your height in centimetres — remove shoes for accuracy.
3
Enter your age — adult BMI categories apply from 18, and the result adds a note for teenagers and adults over 65.
4
Your BMI, category, healthy weight range and ideal weight appear instantly with a visual gauge on the right.
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Frequently Asked Questions
What is a normal BMI for a 5.8 male?
For a man who is 5'8" (173 cm), a healthy BMI is 18.5–22.9 under Indian guidelines (18.5–24.9 on the global WHO scale). At 173 cm that means roughly 55–68.5 kg. A BMI of 24.4 at this height (about 73 kg) is healthy on the WHO scale but counts as overweight (23–24.9) under Indian guidelines.
Is this BMI calculator for men or women?
Both. The BMI formula (weight ÷ height²) and the categories are the same for adult men and women, so you don't need to select a gender. Women naturally carry more body fat than men at the same BMI, so for a fuller picture also check your waist size or use our Body Fat Calculator.
What would be my ideal weight?
Enter your height above and the calculator shows your healthy weight range (BMI 18.5–22.9) and a single ideal weight at BMI 22. For a 170 cm adult that's a healthy range of about 53.5–66.2 kg, with 63.6 kg at BMI 22. For formula-based ideal weights by gender and frame size, use our Ideal Weight Calculator.
What is the normal weight range for Indian adults?
It depends on height. Using the Indian healthy BMI range of 18.5–22.9: at 152 cm (close to the average height of Indian women) that's about 43–53 kg; at 160 cm, 47–59 kg; at 165 cm (close to the average height of Indian men), 50–62 kg; at 175 cm, 57–70 kg. Enter your exact height above for your own range.
How do I calculate the correct weight for my height and age?
For adults, healthy weight is based on height, not age: use this BMI calculator for your healthy range, or the height table above. Adult BMI categories apply from age 18. Teenagers need age-based growth charts, and some doctors accept a slightly higher BMI in people over 65.
What is a healthy BMI for men?
For Indian men, a healthy BMI is 18.5–22.9. Under Indian consensus guidelines, 23–24.9 is overweight and 25 or above is obese. On the global WHO scale, healthy is 18.5–24.9, overweight 25–29.9 and obese 30 or above.
What is a healthy BMI for women?
The same as for men: for Indian women a healthy BMI is 18.5–22.9, with 23–24.9 overweight and 25 or above obese. Enter your height above to see what that range means in kilograms for you.
What is the ideal height and weight for Indians?
Many people use a BMI of about 21–22 as a mid-point target inside the healthy range. At 160 cm that's about 54–56 kg; at 170 cm about 61–64 kg. Anywhere within 18.5–22.9 counts as healthy under Indian guidelines.
Is BMI different for men and women?
The BMI formula is the same for both, but the health interpretation differs. Women naturally carry more body fat than men at the same BMI. Athletes may show high BMI without being overweight — which is why waist circumference context matters alongside BMI.
Is BMI the same as a weight-for-age calculator?
No. BMI compares weight with height, not age. For adults the same BMI categories apply at every age, although some research suggests a slightly higher BMI may not carry the same risk after 65 — ask your doctor. Children and teenagers are assessed with age- and sex-specific growth charts.
Is BMI accurate for everyone?
BMI is a useful first-step screening tool but has limitations. It may overestimate fat in muscular people and underestimate fat in older adults who have lost muscle. Combine BMI with waist circumference and a doctor's assessment for a complete picture.
What is the 2025 Indian obesity guideline?
In 2025, an Indian expert group published revised guidelines that use a BMI above 23 as the threshold for obesity in Indian adults, graded into Stage 1 (no effect on organs or daily function) and Stage 2 (with extra belly fat plus related health problems such as diabetes or joint pain). This calculator shows the widely used consensus categories — 23–24.9 overweight, 25+ obese — so any BMI above 23 is worth discussing with your doctor.