Ideal Body Weight Calculator ⚖️
Use this free Ideal Body Weight Calculator to estimate a healthy body weight range based on your height and gender.
This tool uses trusted formulas such as Devine, Robinson, Miller, and Hamwi to calculate your ideal body weight and also shows a healthy BMI weight range to help you better understand your target weight and overall fitness goals.
Calculate your healthy weight range based on multiple clinical formulas.
0
0
What Is an Ideal Body Weight Calculator?
An Ideal Body Weight (IBW) calculator is a tool that uses your gender, height, and body frame size to estimate the optimal healthy weight for your body. While it cannot account for heavy muscle mass (like a bodybuilder might have), it provides a highly accurate baseline for the average person to set healthy weight loss or weight gain goals.
How Is Ideal Body Weight Calculated?
Ideal body weight is not a single number. Instead, it is an average derived from four specific mathematical formulas created by doctors between 1964 and 1983 (Devine, Robinson, Miller, and Hamwi). All of these formulas use a baseline weight for a person who is exactly 5 feet (60 inches) tall, and then add a specific amount of weight for every inch over 5 feet.
Ideal Body Weight Formulas Explained
Here are the exact mathematical equations used to calculate IBW for Men and Women (calculated in Kilograms):
| Formula Name | Equation for Men | Equation for Women |
|---|---|---|
| Devine (1974) | 50.0 kg + 2.3 kg per inch over 5ft | 45.5 kg + 2.3 kg per inch over 5ft |
| Robinson (1983) | 52.0 kg + 1.9 kg per inch over 5ft | 49.0 kg + 1.7 kg per inch over 5ft |
| Miller (1983) | 56.2 kg + 1.41 kg per inch over 5ft | 53.1 kg + 1.36 kg per inch over 5ft |
| Hamwi (1964) | 48.0 kg + 2.7 kg per inch over 5ft | 45.5 kg + 2.2 kg per inch over 5ft |
Healthy BMI Weight Range
While the IBW formulas pinpoint a specific number, the medical community typically relies on the Body Mass Index (BMI). A "healthy" BMI falls between 18.5 and 24.9. Our calculator reverses the BMI math to show you the exact spectrum of weight you can carry and still be considered medically healthy for your height.
How to Use the Ideal Body Weight Calculator
- Step 1: Select your preferred measurement system (Imperial or Metric).
- Step 2: Select your Gender and your estimated Body Frame Size (small, medium, or large).
- Step 3: Enter your exact height.
- Step 4 (Optional): Enter your current weight to see exactly how many pounds or kilograms you are away from your target and plot your position on the visual gauge.