Ideal Weight Calculator
Calculate your ideal body weight using four validated medical formulas — Devine, Robinson, Miller, and Hamwi. Get a realistic healthy weight range for your height.
How to Use the Ideal Weight Calculator
Select your gender and enter your height in centimetres. The calculator applies four widely-used ideal weight formulas and shows you the full range, helping you set a realistic and evidence-based weight goal.
The Extended Calculator below shows a visual weight range chart across heights and lets you compare results by body frame size. The Professional Calculator adds all 7 formulas side by side, a wrist-based frame size estimator, and a weight loss trajectory table.
Formula Comparison
| Formula | Ideal Weight |
|---|---|
| Robinson | 60.8 kg |
| Miller | 62.5 kg |
| Devine | 61.4 kg |
| Hamwi | 61.1 kg |
| BMI-22 | 63.6 kg |
| Lemmens | 63.6 kg |
| Average | 62.2 kg |
Ideal Weight Formulas
Devine (Male): 50 + 2.3 × (height in inches − 60)
Devine (Female): 45.5 + 2.3 × (height in inches − 60)
Robinson (Male): 52 + 1.9 × (height in inches − 60)
Robinson (Female): 49 + 1.7 × (height in inches − 60)
Miller (Male): 56.2 + 1.41 × (height in inches − 60)
Miller (Female): 53.1 + 1.36 × (height in inches − 60)
Hamwi (Male): 48 + 2.7 × (height in inches − 60)
Hamwi (Female): 45.5 + 2.2 × (height in inches − 60)
Example
Female, 168 cm (66.1 inches → 6.1 inches over 5 ft):
Devine = 45.5 + (2.3 × 6.1) = 59.5 kg
Robinson = 49 + (1.7 × 6.1) = 59.4 kg
Range across all formulas: approximately 57–61 kg
All 7 Formulas Side-by-Side
| Formula | Ideal Weight | To Goal |
|---|---|---|
| Robinson (1983) | 60.8 kg | +11.2 kg |
| Miller (1983) | 62.5 kg | +9.5 kg |
| Devine (1974) | 61.4 kg | +10.6 kg |
| Hamwi (1964) | 61.1 kg | +10.9 kg |
| BMI-22 (WHO) | 63.6 kg | +8.4 kg |
| Peterson (2016) | 63.8 kg | +8.2 kg |
| Lemmens (2005) | 63.6 kg | +8.4 kg |
| Average | 62.4 kg | +9.6 kg |
Weight Loss Trajectory
| Week | Est. Weight | Remaining |
|---|---|---|
| Week 0 | 72.0 kg | 9.6 kg |
| Week 4 | 70.0 kg | 7.6 kg |
| Week 8 | 68.0 kg | 5.6 kg |
| Week 12 | 66.0 kg | 3.6 kg |
| Week 16 | 64.0 kg | 1.6 kg |
| Week 20 | 62.4 kg | 0.0 kg |
Frame Size Guide (wrist method)
Measure your wrist circumference at the narrowest point. The frame size calculator uses height-to-wrist ratio.
Males: Ratio >10.4 = small, 9.6–10.4 = medium, <9.6 = large
Females: Ratio >11.0 = small, 10.1–11.0 = medium, <10.1 = large
Your estimated frame: Medium frame