Ideal Weight Calculator
There is no single 'perfect' weight. This calculator shows a healthy range based on BMI, plus four well-known formulas for comparison.
Updated
For general information only — not medical advice. Consult a doctor or registered dietitian before making health decisions.
Formula
Healthy range = 18.5 × h² to 24.9 × h² (h in metres)
Devine (men) = 50 + 2.3 × inches over 5 ft
Devine (women) = 45.5 + 2.3 × inches over 5 ft
The classic formulas were developed for medication dosing and only work for heights of 5 ft and above.
Examples
Man, 5 ft 9 in
Healthy weight range for 175 cm: 56.8–76.5 kg (BMI 18.5–24.9)
Woman, 5 ft 3 in
Healthy weight range for 160 cm: 47.4–63.8 kg (BMI 18.5–24.9)
Important information
- Frame size, muscle mass and age all affect what is healthy for you.
- These results are general estimates for healthy adults and are not medical advice. Children, pregnant or breastfeeding women, athletes and people with medical conditions should seek professional guidance.
Frequently asked questions
What is the ideal weight for 5 ft 6 in?
The BMI-based healthy range is about 52–70 kg (or 52–64 kg using South Asian cut-offs).
Which formula is best?
None is perfect. The BMI-based range is the most widely used for health screening.
Why do formulas give different answers?
Each was derived from different populations and for different purposes.
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