Ideal Weight Calculator
Find your healthy weight range using the Asian BMI standard, Devine formula, and Robinson formula. Results are reference ranges, not rigid targets.
This ideal weight calculator estimates a healthy weight range for your height using four trusted methods side by side: the BMI method set to the Asian standard, plus the Devine, Robinson, and Hamwi clinical formulas. Instead of giving one number, it shows a range, because a healthy weight is never a single fixed figure. The BMI method reflects population health data, while the older clinical formulas were built as quick bedside references for medication dosing and nutrition.
It is designed for anyone who wants a sensible target weight rather than a fad goal. If you are planning to lose or gain weight, this gives you a grounded range to aim for, one that accounts for the lower healthy thresholds used across Asia. People with a lot of muscle, such as regular strength trainers, will often sit healthily toward the top of the range or slightly above it.
To read your result, treat the combined range as your healthy zone and aim to land anywhere within it rather than at the very bottom. If the formulas disagree, that is normal, since each uses a different baseline. Focus on your energy and strength as much as the number on the scale. For a fuller explanation of why Asian healthy weight bands are lower, see our guide to a healthy BMI for Asians.
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⚖ Ideal Weight Range
⚚️ Health disclaimer: This calculator gives general estimates for educational purposes only. It is not medical advice and is not a substitute for guidance from a qualified doctor or dietitian. Results are based on general formulas and population averages, and individual needs vary. If you have any health concerns, or before changing your diet, exercise, or lifestyle, please speak with a healthcare professional.
How to Use This Calculator
Select gender and unit
Choose male or female, and whether you prefer cm or feet/inches.
Enter your height
Type your height accurately. Even a 1 cm difference shifts the result.
Read your range
You will see three formulas plus a combined range. Your healthy weight sits anywhere in that range.
Frequently Asked Questions
How is ideal body weight calculated?
Several formulas are used. The BMI method gives a range based on a healthy BMI (18.5 to 22.9 for Asians). Clinical formulas like Devine and Robinson use height above 5 feet (152 cm) to estimate an ideal body weight. No single number is definitively ideal since healthy weight varies with muscle mass, bone density, and individual health.
What is a healthy weight for Asians?
For Asian populations, WHO Asia-Pacific guidelines recommend a healthy BMI of 18.5 to 22.9. This is stricter than the Western standard (up to 24.9) because Asians carry more body fat at the same BMI and face higher metabolic risk at lower weights. For a 165 cm Asian woman, that translates to roughly 50 to 62 kg.
Should I aim for the bottom of my ideal weight range?
Not necessarily. A weight range is given precisely because health does not hinge on a single number. People with more muscle mass can healthily sit toward the upper end of a range. Focus on strength, energy levels, and consistent habits rather than hitting a specific target weight.
How accurate are ideal weight formulas?
These formulas were designed for clinical reference, not precision targets. They do not account for body composition (muscle vs fat), bone structure, or individual metabolic health. Use them as a general guide. A body fat percentage measurement gives a more accurate picture of body composition.
Is ideal weight the same for men and women?
No. Clinical formulas use different baselines for men and women because men typically have higher muscle mass and bone density. The Devine formula sets the male baseline at 50 kg and female at 45.5 kg for a height of 5 feet, adding weight for each additional inch of height.
How to read your ideal weight result
Ideal weight calculators use older formulas (such as Devine and Robinson) that estimate a weight from your height alone. They give a rough reference point, not a target you must hit. They were built decades ago from limited populations, and they do not account for your build, muscle, age, or body composition. Two people at the same height can both be healthy at quite different weights.
A more useful guide for most people is the healthy BMI range for your height. For Asian populations, Singapore's Health Promotion Board uses lower cut-offs than the global standard, because research shows Asians tend to carry more body fat and face higher metabolic risk at a given BMI. The Asian ranges are healthy 18.5 to 22.9, moderate risk 23.0 to 27.4, and high risk 27.5 and above.
A number is not the whole picture
Your weight is one signal among many, and it does not measure your health or your worth. How you eat, sleep, move, and feel matters far more than landing on an exact figure. If a result here makes you anxious, or you find yourself fixating on weight or food, that is worth taking seriously, and a doctor or dietitian can help you set goals that are healthy for your body. Use this as a gentle reference, not a rule.
Sources: WHO Asia-Pacific BMI guidance; Singapore Health Promotion Board and Ministry of Health.