What Is the Goal Weight from BMI Calculator?
This tool tells you exactly how much you would weigh at a target Body Mass Index (BMI) for your height. Instead of asking "what is my BMI?", it flips the equation around: you pick the BMI you want, and it returns the body weight (in kilograms) that produces it. This is useful for setting realistic, healthy weight goals because the BMI scale (underweight, normal, overweight, obese) is defined the same way worldwide.
How to Use It
Enter your height in centimetres and the BMI you would like to reach. The standard "normal weight" range is a BMI of 18.5 to 24.9, with 22 often used as a healthy midpoint. The calculator converts your height to metres, squares it, and multiplies by your target BMI to give your goal weight.
The Formula Explained
BMI is defined as weight (kg) divided by height (m) squared: \(\text{BMI} = \text{weight} / \text{height}^2\). Rearranging to solve for weight gives \(\text{weight} = \text{BMI} \times \text{height}^2\). Height must be in metres, so a height entered in centimetres is divided by 100 first.
$$\text{Goal Weight (kg)} = \text{Target BMI} \times \left(\frac{\text{Height (cm)}}{100}\right)^2$$
Worked Example
Suppose you are 175 cm tall and want to reach a BMI of 22. Convert height: \(175 \div 100 = 1.75\) m. Square it: \(1.75 \times 1.75 = 3.0625\). Multiply by the target BMI: \(22 \times 3.0625 = \mathbf{67.375}\) kg. So a weight of about 67.4 kg corresponds to a BMI of 22 at that height.
$$22 \times 3.0625 = 67.375 \text{ kg}$$FAQ
What BMI should I aim for? For most adults a BMI between 18.5 and 24.9 is considered healthy. Always consider muscle mass, age, and medical advice — BMI is a population guideline, not a diagnosis.
Does this work for any height unit? Enter height in centimetres; the result is in kilograms. To convert, \(1 \text{ kg} \approx 2.205 \text{ lb}\).
Is BMI accurate for athletes? Not always. Very muscular individuals may have a high BMI despite low body fat, so use the result as a general reference.
