What Is Ideal Body Weight — And Why Is It Different for Indians?
Ideal body weight (IBW) is the weight at which an individual is likely to have optimal health outcomes. The concept dates back to insurance industry actuarial tables from the 1940s–60s. Modern formulas (Devine, Robinson, Miller, and Hamwi) provide estimates based purely on height and gender — but they were developed on Western populations and require adjustment for Indians.
Indians tend to have smaller frames, lower bone density, and different fat distribution patterns than the Western populations these formulas were designed for. As a result, direct application of these formulas may overestimate ideal weight for Indian adults. Our calculator presents all four formulas with an "Indian-adjusted" range that accounts for these differences.
The Four Ideal Weight Formulas
1. Devine Formula (1974) — Most Widely Used Clinically
Developed by Dr. B.J. Devine for medication dosing calculations. For men: 50kg + 2.3kg per inch above 5 feet. For women: 45.5kg + 2.3kg per inch above 5 feet. Still widely used in clinical settings for drug dosing, but was never validated as a health or fitness target.
2. Robinson Formula (1983)
A refinement of the Devine formula. For men: 52kg + 1.9kg per inch above 5 feet. For women: 49kg + 1.7kg per inch above 5 feet. Generally produces slightly higher estimates than Devine.
3. Miller Formula (1983)
For men: 56.2kg + 1.41kg per inch above 5 feet. For women: 53.1kg + 1.36kg per inch above 5 feet. Often produces higher estimates, particularly for taller individuals.
4. Hamwi Formula (1964) — Common in Indian Clinical Practice
For men: 48kg + 2.7kg per inch above 5 feet. For women: 45.5kg + 2.2kg per inch above 5 feet. The oldest formula but still used in many Indian hospitals and clinical guidelines.
Why BMI Is a Better Daily Target Than Ideal Weight Formulas
The major limitation of all IBW formulas is that they ignore body composition entirely. A muscular Indian man who weighs 10kg above the formula's estimate may be far healthier than a sedentary person at the "ideal" weight. BMI (while also imperfect) at least incorporates height-to-weight ratio, and for Indians, the Asian cutoff of 18.5–23 BMI is a better reference than any IBW formula.
Our recommendation: use IBW formulas as rough orientation, but target a BMI of 20–22.9 (Indian optimal range) and a body fat percentage of 14–17% (men) or 21–24% (women) for comprehensive health goals.
Healthy Weight Range by Height — Indian Standards
| Height | Healthy Weight Range (Indian BMI 18.5–23) | IBW Estimate (avg of 4 formulas) |
|---|---|---|
| 155 cm (5'1") | 44–55 kg | 49–52 kg |
| 160 cm (5'3") | 47–59 kg | 52–56 kg |
| 165 cm (5'5") | 50–63 kg | 55–60 kg |
| 170 cm (5'7") | 53–67 kg | 58–64 kg |
| 175 cm (5'9") | 57–70 kg | 62–68 kg |
| 180 cm (5'11") | 60–75 kg | 65–72 kg |
| 185 cm (6'1") | 63–79 kg | 69–76 kg |
Building Your Ideal Weight for Health vs. Aesthetics — The Indian Gym-Goer's Dilemma
Many Indian gym-goers have weight goals driven by aesthetics rather than health. This is not necessarily wrong, but it's important to understand the distinction:
- Health-optimal weight: BMI 20–22.9, body fat 15–20% (men) / 22–27% (women). Achievable and sustainable on a balanced Indian vegetarian diet with regular exercise.
- Aesthetic (fitness) weight: BMI 19–21, body fat 12–15% (men) / 18–22% (women). Requires more dietary discipline and consistent training. Achievable but requires deliberate effort.
- Competition lean: BMI 18–20, body fat 5–10% (men) / 12–16% (women). Very difficult to maintain. Not recommended for most people long-term.
For the majority of Indian vegetarian gym-goers, the best goal is the "fitness" category — strong, visible muscle definition, good energy, and excellent health markers. This corresponds to roughly 10–15% below most people's current weight combined with replacing fat mass with muscle mass.
Gaining Muscle While Losing Fat — Body Recomposition for Indians
Many Indians are in a state of "skinny fat" — normal or even low body weight but high body fat and low muscle mass. This is particularly common due to traditionally low-protein diets and sedentary lifestyles. In this case, the goal is not simply to reach an "ideal weight" but to recompose — build muscle while losing fat simultaneously.
Body recomposition works best when you:
- Eat at or near maintenance calories (use our calorie calculator)
- Consume 1.8–2.2g protein per kg bodyweight (use our protein calculator)
- Train with resistance at 3–5x per week
- Be patient — recomposition takes 6–12+ months
The result: you may end up at a similar or slightly higher bodyweight than an IBW formula predicts, but with dramatically better health, aesthetics, and fitness markers.
Ideal weight formulas: Devine (1974), Robinson (1983), Miller (1983), Hamwi (1964). Indian weight range based on Asian BMI cutoffs. Not medical advice.