BMI Calculator (2026) – Body Mass Index for Men & Women

🕐 Updated: April 2026 🔒 Free & Instant ⚖ Indian BMI Standards
⚖ Based on WHO Asia-Pacific Guidelines for Indians
BMI Calculator – Body Mass Index
Weight (kg)
Height (cm)
Gender
Age (years)
Your BMI
24.2
Normal
BMI Value24.2
Category (Indian)Normal
Healthy Weight Range53.4 – 66.1 kg
Weight to Lose/Gain
BMI Scale (Indian Standards)
‹18.518.5232530+
Underweight
<18.5
Normal
18.5–22.9
Overweight
23–24.9
Obese
>25

What is BMI (Body Mass Index)?

BMI (Body Mass Index) is a simple measurement that uses your height and weight to estimate whether you have a healthy body weight. It was developed by Belgian mathematician Adolphe Quetelet in the 19th century and is widely used today by doctors, nutritionists, and health organizations worldwide.

BMI is not a direct measure of body fat but is a useful screening tool to identify potential weight-related health risks. A high BMI can indicate excess body fat and increased risk of conditions like type 2 diabetes, heart disease, high blood pressure, and certain cancers. A low BMI can indicate undernutrition and associated health risks.

Why BMI Matters for Indians

Research shows that South Asians, including Indians, tend to develop obesity-related diseases at lower BMI values compared to Western populations. The WHO Asia-Pacific guidelines recommend lower cut-off points for Indians:

  • Overweight starts at BMI 23 for Indians (vs 25 for others)
  • Obese starts at BMI 27.5 for Indians (vs 30 for others)
  • Indians have higher body fat percentage and abdominal fat at same BMI
  • Risk of diabetes and heart disease begins at lower BMI in Indians

BMI Formula & How to Calculate BMI

BMI = Weight (kg) / Height (m)²

Or in Imperial units:
BMI = (Weight in lbs / Height in inches²) × 703

Example (Metric): Weight = 70 kg, Height = 170 cm (1.70 m)
BMI = 70 / (1.70 × 1.70) = 70 / 2.89 = 24.2

Example (Imperial): Weight = 154 lbs, Height = 5’7″ (67 inches)
BMI = (154 / 67²) × 703 = (154 / 4489) × 703 = 24.1

How to Use BMI Calculator

  • Select Metric (kg/cm) or Imperial (lbs/ft-in)
  • Enter your Weight
  • Enter your Height
  • Select Gender and enter Age
  • Click Calculate BMI — get your BMI with category, healthy weight range, and health tips

BMI Categories for Indians (WHO Asia-Pacific)

BMI RangeCategory (Indian Standard)Health RiskAction Recommended
Below 18.5UnderweightMalnutrition risk, weak immunityConsult doctor, increase caloric intake
18.5 – 22.9Normal / HealthyLow riskMaintain current weight and lifestyle
23.0 – 24.9OverweightModerate risk (diabetes, BP)Diet control, regular exercise
25.0 – 29.9Obese Class IHigh riskMedical advice, lifestyle changes
30.0 – 34.9Obese Class IIVery high riskMedical intervention required
35.0 and aboveObese Class IIIExtremely high riskUrgent medical attention

*Indian/Asian standard uses lower thresholds. Western standard: Normal 18.5-24.9, Overweight 25-29.9, Obese 30+.

Healthy Weight Chart by Height (Indian Standards)

HeightHealthy Weight (Indian: BMI 18.5–22.9)Healthy Weight (Western: BMI 18.5–24.9)
150 cm (4’11”)41.6 – 51.5 kg41.6 – 56.1 kg
155 cm (5’1″)44.4 – 55.0 kg44.4 – 59.8 kg
160 cm (5’3″)47.4 – 58.6 kg47.4 – 63.7 kg
165 cm (5’5″)50.3 – 62.3 kg50.3 – 67.7 kg
170 cm (5’7″)53.4 – 66.1 kg53.4 – 71.9 kg
175 cm (5’9″)56.6 – 70.1 kg56.6 – 76.3 kg
180 cm (5’11”)59.9 – 74.2 kg59.9 – 80.8 kg
185 cm (6’1″)63.3 – 78.4 kg63.3 – 85.4 kg

For more specific BMI ranges, check our BMI for Men and BMI for Women calculators.

Limitations of BMI – When BMI is Not Accurate

While BMI is a useful screening tool, it has several limitations:

  • Athletes & Bodybuilders — may have high BMI due to muscle mass, not fat. Muscle weighs more than fat, making BMI misleadingly high
  • Elderly people — lose muscle mass with age; BMI may appear normal while body fat percentage is high
  • Pregnant women — BMI is not applicable during pregnancy
  • Children — age and gender-specific BMI charts should be used for those under 18
  • Waist circumference is often more predictive of health risk than BMI, especially for Indians

Better Alternatives to BMI

  • Waist-to-Hip Ratio (WHR) — better indicator of abdominal fat
  • Body Fat Percentage — requires DEXA scan or bioelectrical impedance
  • Waist Circumference — above 80 cm (women) or 90 cm (men) indicates high risk for Indians
  • Visceral Fat Assessment — CT scan or MRI for detailed fat distribution

Frequently Asked Questions – BMI Calculator

For Indians, normal BMI is 18.5 to 22.9 as per WHO Asia-Pacific guidelines. BMI 23-24.9 is overweight and 25+ is obese. These are lower than Western standards (18.5-24.9 normal) because Indians develop obesity-related diseases at lower BMI values.
BMI = Weight (kg) / Height (m)². Example: 70 kg, 170 cm → BMI = 70 / (1.70)² = 70 / 2.89 = 24.2. Or use our free BMI calculator above — enter weight and height to get instant BMI with category and healthy weight range.
For 5’7″ height (170 cm), healthy weight range (Indian standard BMI 18.5-22.9) is 53.4 kg to 66.1 kg. For Western BMI standard (18.5-24.9), healthy range is 53.4 to 71.9 kg. Our calculator shows your personal healthy weight range based on your height.
The BMI formula is the same for men and women. However, women naturally have more body fat than men at the same BMI — healthy body fat % for women is 20-30% vs 8-20% for men. This is why our calculator asks for gender to provide more personalized health guidance.
For Indians, BMI 25 and above is considered obese (Class I) as per WHO Asia-Pacific guidelines. Western standard uses 30 as the obese threshold. This lower cut-off for Indians is because South Asians have higher metabolic risk and body fat percentage at lower BMI values.
Yes. Athletes and bodybuilders often have high BMI due to heavy muscle mass, not fat. Since muscle weighs more than fat, their BMI may show “overweight” or “obese” even when they are very healthy. For athletes, body fat percentage measurement is a better indicator than BMI.