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Ideal weight calculator: find your healthy weight range
See what four widely-cited clinical formulas say about your ideal weight — and where they agree.
Ideal weight calculator
Your result
155.2–165.8 lb
| Formula | kg | lb |
|---|---|---|
| Devine (1974) | 73.2 | 161.3 |
| Robinson (1983) | 71.1 | 156.9 |
| Miller (1983) | 70.4 | 155.2 |
| Hamwi (1964) | 75.2 | 165.8 |
About this tool
What ideal weight formulas measure — and their limits
The concept of an "ideal" weight has a long clinical history. Four formulas — Devine (1974), Robinson (1983), Miller (1983), and Hamwi (1964) — are the most widely cited in medical and dietetic practice.
None of them was derived from large population studies of health outcomes. They were originally developed to estimate drug dosing based on body size — a context where a single central estimate is more useful than a range. For body composition goals, treat the range across all four as a broad ballpark, not a target to hit precisely.
Step by step
How to use the ideal weight calculator
- 1
Enter your height and sex
Height is the only body measurement these formulas use.
- 2
The calculator shows all four formula results and the combined range
The green band on the bar shows where the four formulas cluster.
- 3
Compare to your current weight to understand the gap
Use this alongside BMI and body fat % for a fuller picture.
Methodology
The four formulas
All formulas use height in inches. Results are in kg. The variable h = height in inches − 60 (inches above 5 feet).
| Formula | Male | Female |
|---|---|---|
| Devine (1974) | 50 + 2.3 × h | 45.5 + 2.3 × h |
| Robinson (1983) | 52 + 1.9 × h | 49 + 1.7 × h |
| Miller (1983) | 56.2 + 1.41 × h | 53.1 + 1.36 × h |
| Hamwi (1964) | 48 + 2.7 × h | 45.5 + 2.2 × h |
Worked example
Example calculation
A woman 165 cm (65 in) tall — 5 inches above 60:
- Devine: 45.5 + 2.3 × 5 = 57.0 kg
- Robinson: 49 + 1.7 × 5 = 57.5 kg
- Miller: 53.1 + 1.36 × 5 = 59.9 kg
- Hamwi: 45.5 + 2.2 × 5 = 56.5 kg
Range: 56.5–59.9 kg.
Be aware
Assumptions and limitations
- All four formulas apply a fixed adjustment per inch above 5 feet — they were designed for heights 5'0″–6'2″.
- They don't account for muscle mass, bone density, or body composition.
- They were built from datasets that may not reflect all ethnicities.
- Use them as context alongside BMI and body fat % — not as standalone targets.
Questions
Frequently asked questions
Which formula should I trust most?
No single formula is definitively more accurate for health outcomes. Devine is the most commonly cited in clinical literature; Miller tends to give the highest values and may be more appropriate for athletic builds.
Is ideal weight the same as a healthy BMI weight?
No. A BMI of 18.5–24.9 gives a broader range that increases with height nonlinearly. Ideal weight formulas grow linearly with height, which diverges from BMI at extreme heights.
What if I'm outside the range?
These formulas are reference points, not diagnostic criteria. Body composition, fitness level, bone density and individual variation all matter. A clinician or registered dietitian can give context.
Estimates, not medical advice
FitnessCalculator.info provides general health information for educational purposes only and does not replace advice from a qualified doctor or registered dietitian.