See your ideal body weight from 4 validated scientific formulas — Robinson, Miller, Devine and Hamwi — plus the evidence-based BMI healthy weight range for your height.
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🎯 Ideal Body Weight Calculator
Robinson · Miller · Devine · Hamwi — all 4 formulas + BMI healthy range · Men & women
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Robinson
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Miller
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Devine
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Hamwi
Average of 4 Formulas—
Your Current Weight—
Difference from Average Ideal—
Healthy BMI Weight Range (18.5–24.9)—
📋 Understanding Your Results
⚠️ Ideal weight formulas were developed on specific populations and may not apply to athletes, older adults, or those with unusual body compositions. The BMI-based range is the most broadly applicable target.
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Ideal Weight Formulas — A Comparison
Four major ideal body weight formulas are used in clinical and research settings. Each was derived from different populations, so they produce slightly different results for the same individual. No single formula is definitively "correct" — which is why showing all four and averaging them provides a more robust estimate.
Formula
Year
Based On
Best For
Robinson (1983)
1983
NHANES insurance data
General adults
Miller (1983)
1983
Life insurance tables
Lighter frame estimate
Devine (1974)
1974
Drug dosing research
Widely used clinically
Hamwi (1964)
1964
Diabetic dietary needs
Heavier frame estimate
Is Ideal Weight the Same as Healthy Weight?
Not exactly. "Ideal weight" from these formulas provides a single target number, but health research supports a range of healthy weights corresponding to a BMI of 18.5–24.9. The healthy BMI range is broader and better accounts for individual variation in frame size, muscle mass, and bone density.
For most people, the 4-formula average and the BMI healthy range overlap substantially. If they differ significantly for you, the BMI-based range (from our BMI calculator) is the more broadly validated target.
Body Composition vs Body Weight
Weight alone tells only part of the story. Two people at the same "ideal weight" can have very different body fat percentages, muscle mass, and health profiles. A 75 kg person with 12% body fat is in a fundamentally different health state than a 75 kg person with 30% body fat. Use our body fat calculator for a body-composition perspective alongside weight targets.
Frequently Asked Questions
A healthy weight corresponds to a BMI of 18.5–24.9. For someone 175 cm tall, that is approximately 56.7–76.2 kg. Our calculator shows both the formula-based ideal weight and the BMI-based healthy range for your height. The BMI range is the most evidence-supported target for the general population.
No — ideal weight formulas are based on height and sex only, and do not account for muscle mass, frame size, or body composition. A heavily muscled athlete will correctly have a higher ideal weight than the formulas suggest. For athletes, body fat percentage (our body fat calculator) is a more appropriate target metric than scale weight.
If you are above your ideal weight, a calorie deficit of 300–500 kcal/day combined with resistance training produces optimal results (fat loss while preserving muscle). Use our calorie calculator to find your personalised daily target. Expect 0.25–0.5 kg of fat loss per week on a well-structured programme.