Ideal Weight Calculator
Find your ideal body weight range based on multiple clinical formulas. Compare Devine, Robinson, Miller, and Hamwi outputs against healthy BMI weight levels.
Input metrics
Formula Calculations
| Formula Name | Ideal Weight |
|---|---|
| Devine Formula | -- |
| Robinson Formula | -- |
| Miller Formula | -- |
| Hamwi Formula | -- |
| Healthy BMI Range (18.5 - 24.9) | -- |
How to Use the Ideal Weight Calculator
Learn your ideal clinical weight targets. Follow these steps:
- Choose your Unit System at the top: Metric (kg/cm) or Imperial (lbs/ft-in).
- Select your biological Gender (formulas adjust base values by gender).
- Enter your Height using the range sliders or input fields.
- (Optional) Enter your Current Weight to see how your weight compares to the ideal clinical estimates.
- Click Calculate Ideal Weight to check the clinical results.
The Four Ideal Weight Formulas Explained
Researchers designed these formulas by defining a baseline weight for a height of 5 feet (60 inches) and adding increments for every inch over 5 feet:
- Devine (1974): The most widely used formula, especially in hospital settings to calculate drug dosages.
- Robinson (1983): Developed to refine Devine's formula by adjusting the growth increment slightly.
- Miller (1983): Formulated in the same year as Robinson but uses a different baseline and slope.
- Hamwi (1964): The oldest formula, historically used in nutrition and dietetics.
Frequently Asked Questions
What is my ideal body weight? ↓
Your ideal body weight is an estimate of a healthy weight range based on your gender and height. Four popular scientific formulas are used to calculate this: Devine, Robinson, Miller, and Hamwi.
Why do the four formulas give different results? ↓
Different formulas were developed by separate researchers using different baseline parameters. For example, Devine is widely used in pharmacology, while Robinson and Miller adjust the height-weight relationship to yield slightly different baselines.
What is the difference between ideal weight and healthy BMI? ↓
Ideal weight formulas provide specific targets, whereas a healthy BMI (Body Mass Index) range identifies the wider weight boundaries (between BMI 18.5 and 24.9) where your health risk is historically lowest.
Are ideal weight formulas accurate for everyone? ↓
No. These formulas only account for height and gender. They do not distinguish between muscle tissue and fat tissue, making them less accurate for bodybuilders, athletes, pregnant individuals, or the elderly.
How should I interpret the results? ↓
Rather than focusing on a single number, it is best to view the results as a general range. Aiming to stay within the healthy BMI boundaries is a standard health goal.