Ideal Body Weight Calculator
⚖️ Ideal Body Weight (IBW) Calculator
📘 What is Ideal Body Weight (IBW)?
Ideal Body Weight (IBW) is an estimate of what a person should weigh based on their height, gender, and sometimes age. It is commonly used in medicine to determine drug dosages, assess nutritional status, and evaluate healthy weight ranges.
📏 IBW Calculation Methods
Several formulas have been proposed to estimate ideal weight. The most common ones include:
- Devine Formula: Developed in 1974 for medication dosing in obese patients.
- Robinson Formula: A refined method using a slightly lower weight base.
- Miller, Hamwi: Other less commonly used alternatives.
📐 Devine Formula
- Male: 50 kg + 2.3 kg per inch over 5 ft
- Female: 45.5 kg + 2.3 kg per inch over 5 ft
📐 Robinson Formula
- Male: 52 kg + 1.9 kg per inch over 5 ft
- Female: 49 kg + 1.7 kg per inch over 5 ft
🧮 Example
Let’s say your height is 170 cm (5 feet 7 inches).
- Devine (Male): 50 + 2.3×7 = 66.1 kg
- Robinson (Male): 52 + 1.9×7 = 65.3 kg
- Devine (Female): 45.5 + 2.3×7 = 61.6 kg
- Robinson (Female): 49 + 1.7×7 = 61.9 kg
✅ Why Use IBW?
- Guide medication dosages
- Set realistic weight goals
- Screen for nutritional health
❓ Limitations
IBW doesn’t consider body composition such as muscle vs fat, bone density, or fitness level. It is a general estimate, not a perfect standard for every individual.
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⚠️ Disclaimer
This tool is for general educational purposes and not a substitute for medical advice. Always consult a healthcare provider for personalized health evaluation.
Use this Ideal Body Weight calculator to find a healthy target range based on well-established formulas.