Ideal Weight Calculator – for all Men Women
Find your scientifically recommended weight range.
What is the “perfect” weight for your height? While there isn’t a single number that fits everyone, medical experts use several standardized formulas to determine an Ideal Body Weight (IBW) range. These formulas are commonly used by healthcare providers in the US and UK to calculate medication dosages and assess general health risks.
Ideal Weight Calculator
Based on Miller & Devine Formulas
Enter height for target weight analysis
The Standard Medical Formulas
Our calculator provides results based on the four most recognized formulas used in clinical settings. Most of these equations are based on a base height of 5 feet (60 inches).
1. The J.D. Robinson Formula (1983)
Often considered the most popular for general use.
- Men: 52 kg + 1.9 kg per inch over 5 feet
- Women: 49 kg + 1.7 kg per inch over 5 feet
2. The D.R. Miller Formula (1983)
A common alternative to Robinson.
- Men: 56.2 kg + 1.41 kg per inch over 5 feet
- Women: 53.1 kg + 1.36 kg per inch over 5 feet
3. The G.J. Hamwi Formula (1964)
The classic formula often used in nutrition and dietetics.
- Men: 48.0 kg + 2.7 kg per inch over 5 feet
- Women: 45.5 kg + 2.2 kg per inch over 5 feet
4. The B.J. Devine Formula (1974)
The most widely used formula in the medical community for calculating drug clearance.
- Men: 50.0 kg + 2.3 kg per inch over 5 feet
- Women: 45.5 kg + 2.3 kg per inch over 5 feet
Frequently Asked Questions
There is no “perfect” formula, which is why we provide all four. However, the Devine Formula is the gold standard used by pharmacists and doctors globally. If you are using this for general fitness, an average of all four formulas usually provides the most realistic target.
These formulas are technically designed for adults 5 feet and taller. For those shorter than 5 feet, the weight is usually subtracted for every inch below 60 inches, though the accuracy decreases at extreme heights.
No. BMI (Body Mass Index) tells you your current status (e.g., “Overweight”), whereas Ideal Weight gives you a specific target weight to aim for based on clinical averages.