What is Ideal Weight Calculator?
An ideal weight calculator estimates the healthy weight range for your height and gender using multiple established medical formulas. Rather than giving a single number, our calculator shows results from 5 different formulas, providing a range that accounts for individual variation.
The calculator includes: Devine (most commonly used medically), Robinson (revised Devine), Miller (alternative estimate), Hamwi (clinical standard), and BMI-based range (18.5–24.9 BMI). You can also enter your current weight to see how you compare.
How It Works
Enter your height, gender, and optionally your current weight. The calculator computes ideal weight using all 5 formulas simultaneously and displays them in a comparison table and bar chart. A visual weight range bar shows underweight, healthy, and overweight zones. If you enter your current weight, it shows your BMI and how far you are from the ideal range.
Formula
Devine: Male = 50 + 2.3 × (inches over 5ft), Female = 45.5 + 2.3 × (inches over 5ft) Robinson: Male = 52 + 1.9 × (inches over 5ft), Female = 49 + 1.7 × (inches over 5ft) Miller: Male = 56.2 + 1.41 × (inches over 5ft), Female = 53.1 + 1.36 × (inches over 5ft) Hamwi: Male = 48 + 2.7 × (inches over 5ft), Female = 45.5 + 2.2 × (inches over 5ft) BMI Range: Weight = BMI × height(m)², where BMI = 18.5 to 24.9
Formula Explained
All height-based formulas use a base weight at 5 feet tall and add a fixed amount per inch of additional height. They were developed from population studies in the 1970s–1990s. The Devine formula is the basis for most others. The BMI-based range is the most modern approach, recommended by the WHO, defining healthy as 18.5–24.9 kg/m².
Example
Male, 5'9" (175 cm): Devine: 73.0 kg (161 lbs) Robinson: 69.1 kg (152 lbs) Miller: 68.9 kg (152 lbs) Hamwi: 72.3 kg (159 lbs) BMI Range: 56.7–76.5 kg (125–169 lbs) Ideal range: 68.9–73.0 kg (152–161 lbs) Average: 70.8 kg (156 lbs)
Tips & Best Practices
- ✓Focus on the weight range rather than any single number.
- ✓Consider your body composition — muscle mass affects the numbers.
- ✓BMI-based range is the broadest and most accepted by health organizations.
- ✓Revisit your ideal weight as a reference point, not a strict target.
- ✓Pair ideal weight knowledge with BMR/TDEE calculations for actionable diet planning.
Common Use Cases
- •Setting realistic weight goals based on scientific formulas
- •Understanding healthy weight ranges for your height and build
- •Comparing your current weight against established benchmarks
- •Discussing weight targets with your healthcare provider
- •Pairing with BMR and calorie calculators for comprehensive health planning