Ideal Weight Calculator
The Ideal Weight Calculator estimates your ideal body weight based on several formulas including Devine, Robinson, Miller, and Hamwi. These formulas use height and gender to calculate a target weight range. While no single formula is perfect, they provide a useful reference point for health goals. The calculator shows results from multiple formulas so you can compare and find a range that works for you.
Formula
Devine Formula (most common): Men: IBW = 50 + 2.3 x (height in inches - 60) Women: IBW = 45.5 + 2.3 x (height in inches - 60) Robinson Formula: Men: IBW = 52 + 1.9 x (height - 60) Women: IBW = 49 + 1.7 x (height - 60) Miller Formula: Men: IBW = 56.2 + 1.41 x (height - 60)
Example
Male, 5 feet 10 inches (70 inches): Devine: 50 + 2.3 x (70 - 60) = 73 kg Robinson: 52 + 1.9 x 10 = 71 kg Miller: 56.2 + 1.41 x 10 = 70.3 kg Average: ~71.4 kg (157 lbs)
How to Use
- Enter your gender and height
- The calculator shows results from multiple formulas
- Compare the different estimates
- Find a weight range that works for you
- Consult a healthcare professional for personalized advice
Frequently Asked Questions
What is ideal body weight?
Ideal body weight (IBW) is a reference weight based on height and gender. It was originally developed for drug dosing calculations. IBW is not necessarily the best weight for every individual — it is a statistical reference point.
Which formula is most accurate?
The Devine formula is the most widely used and studied. However, all formulas have limitations. They do not account for muscle mass, bone density, or body composition. Use IBW as a reference, not an absolute target.
Should I aim for my ideal weight?
Use IBW as a general guide, not a strict target. A healthy weight range is more important than a single number. Consider body fat percentage, waist circumference, and how you feel at your current weight. Consult a healthcare professional for personalized advice.
Do these formulas work for very tall or short people?
The formulas are less accurate at extreme heights. They were developed based on average populations. Very tall or very short individuals may find the results unrealistic. BMI and body fat percentage may be more useful for extreme heights.
How is ideal weight different from BMI?
IBW gives a specific target weight based on height and gender. BMI gives a weight category (underweight, normal, etc.) based on weight and height. IBW is a single number; BMI is a ratio. Both are reference tools, not definitive measures.