BMI Calculator India – Free Body Mass Index Calculator | DietDekho
🩺 Free Health Tool

Free BMI Calculator
Know Your Healthy Weight

Enter your weight & height to instantly get your Body Mass Index, ideal weight range, and expert diet advice — in seconds.

4 BMI Categories
100% Free & Instant
Ft & Cm Both Units
Expert Diet Advice

Check Your BMI

Get your health insights in seconds

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Ft/In Cm
⚠ Height is required
⚠ Weight is required
⚠ Age is required
What Is BMI?

Understanding Your Body Mass Index

Body Mass Index (BMI) is a simple number calculated from your weight and height. Healthcare professionals use it as a quick screening tool to categorise body weight and estimate the risk of weight-related health conditions. For Indians, special lower thresholds are recommended because South Asians carry more body fat at the same BMI as Westerners.

BMI RangeCategoryHealth Risk
Below 18.5UnderweightModerate
18.5 – 22.9Normal Weight ✓Low
23.0 – 27.4OverweightModerate
27.5 and aboveObeseHigh
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BMI Formula

BMI = Weight (kg) ÷ Height² (m²)
Example: 70 ÷ (1.75×1.75) = 22.9 (Healthy)

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Indian Cut-offs

Overweight starts at 23, obese at 27.5 — lower than Western standards due to higher visceral fat risk in South Asians.

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BMI Limitations

BMI doesn't account for muscle mass, bone density, age, or fat distribution. It is a screening tool — not a standalone diagnosis.

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PCOS, Thyroid & Diabetes

Medical conditions can affect weight and metabolism. A certified dietitian should interpret your BMI in context of your condition.

Expert Guidance
Tips

How to Reach Your Healthy Weight

  • 1
    Eat in a calorie surplus or deficit — a controlled surplus of 300–500 kcal/day supports healthy weight gain; a similar deficit supports sustainable fat loss without muscle loss.
  • 2
    Prioritise protein at every meal — aim for 0.8–1.2 g per kg of body weight. Dal, paneer, eggs, curd, and legumes are excellent Indian sources for every meal.
  • 3
    Strength train 3–4 days per week — resistance exercise directs calories toward lean muscle gain and prevents muscle loss during fat loss phases.
  • 4
    Sleep 7–8 hours every night — growth hormone, essential for body composition, is predominantly secreted during deep sleep. Poor sleep disrupts weight management.
  • 5
    Track progress weekly, not daily — weigh yourself at the same time each week. Monthly body measurements alongside BMI give the truest picture of progress.
  • 6
    Get a blood panel done — deficiencies in iron, Vitamin B12, Vitamin D, and thyroid function are common in India and directly impair effective weight management.
FAQs

Common Questions About BMI

Answers from DietDekho's registered dietitians to the most frequently asked questions about BMI calculation, healthy weight, and what your result means for your health.

What is a healthy BMI range for Indians? +
For Indians and other South Asians, a BMI between 18.5 and 22.9 is considered healthy. Below 18.5 is underweight, 23–27.4 is overweight, and 27.5 or above is obese. These are lower than Western standards because South Asians carry significantly more visceral fat at the same BMI, leading to higher cardiovascular and metabolic risk.
How is BMI calculated? +
BMI = Weight (kg) ÷ Height² (m²). For example, a person weighing 70 kg at 1.75 m has a BMI of 70 ÷ (1.75 × 1.75) = 22.9 — healthy range for Indians. Our calculator supports both Ft/In and Cm inputs so you always get an accurate result without manual conversion.
Can BMI alone determine if I am healthy? +
No. BMI is a useful screening tool but cannot distinguish between muscle and fat, or account for fat distribution, age, or sex. A muscular person may have a high BMI with very low body fat. BMI should always be used alongside waist circumference, blood tests, and a professional evaluation for a complete health picture.
How does PCOS, thyroid, or diabetes affect my BMI? +
Conditions like PCOS, PCOD, hypothyroidism, and diabetes significantly affect metabolism and weight distribution. Standard BMI thresholds may not accurately represent your health risk in the presence of these conditions. A certified dietitian who specialises in these disorders should review your BMI in context and design a condition-specific nutrition and lifestyle plan.
What should I do if my BMI is outside the healthy range? +
If your BMI is below 18.5, focus on a structured weight gain plan using calorie-dense, nutrient-rich foods and strength training. If above 22.9, work on gradual, sustainable fat loss through a calorie-controlled diet and daily movement. In both cases, consulting a certified dietitian is strongly recommended. DietDekho offers free consultations with registered dietitians who create fully personalised plans.
How often should I check my BMI? +
Checking your BMI every 4–6 weeks is sufficient for most adults. Daily weight fluctuations reflect water retention and food volume — not actual fat or muscle change. Combining monthly BMI checks with body measurements (waist, hips, arms) and progress photos gives the most accurate picture of your body composition over time.
Medical Disclaimer: BMI Calculator results provided by DietDekho are for general informational and educational purposes only. They do not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional or registered dietitian before making changes to your diet, exercise routine, or medical care. Individual results may vary.