Reverse BMI Calculator |Calculate Optimal Weight or Height
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Reverse BMI calculator is a tool to calculate the height or weight from the BMI value. This tool helps to maintain the BMI range by using the optimal weight or height value. For example, if you want to maintain the BMI of 24 and your height is 5 in 4 ft, then BMI reverse calculator help you assist in calculating the required weight to maintain. This is the reverse tool to help you balance your body mass index.
Reverse BMI Formula
The reverse BMI formula is obtained by rearranging the formula of BMI. The formula can be modified based on measurement system. For example, adjusting the conversion of units from metric to imperial or imperial to metric system.
BMI = Weight / (height)2
Therefore,
Reverse Weight = BMI x (Height)2
Or, Reverse Height = √(BMI / weight (kg))
Reverse BMI Calculator to Find Height
In order to find the required height from the bmi and weight value, use the above tool to reverse the calculation. Select the measurement system of your choice and output the result.
Example Calculation
What will be the required height of a person weighing 70 kilogram and want to achieve a BMI of 24.
In order to find the height from the given values,
Height = √(BMI / weight (kg))
= √(70/ 24)
≈ √2.92
≈ 1.71 m
So, a person weighing 70 kg with a BMI of 24 would have a height of approximately 1.71 meters (or about 5 feet 7 inches).
Reverse BMI Calculator to Find Weight
By arranging the formula of BMI, the equivalent weight for the required BMI and height can be calculated. Use either hypothetical value or the actual value to estimate the weight that aligns with the normal value range.
Example Calculation
What will be the required weight to maintain a BMI of 24 for a person of height 1.75 m.
Here, the given values are: 24 and height = 1.75m
The reverse formula to find weight is given by,
Required Weight = BMI × (height )2
= 24 × (1.75)2
= 24×3.0625
≈73.5 kg
Thus, the require weight is 73.5 kg to be align with the above value.
Reverse BMI Calculator in Metric and Imperial
Metric system (kg, m)
Weight (kg) = BMI × (height (m))2
Height (m) = √(BMI / weight (kg))
Imperial System (Pounds, in)
weight (lbs) = BMI × (height (in) / 39.37)2 × 703
Height (in) = √(Weight (lbs) × 703 / BMI)
Note: To use the above imperial height formula, you need to convert ft into inches.
The above tool handles your calculation either in metric or imperial system. It will also save your time and potential errors during hand-based calculation. We recommend using our tool which is free, reliable and is in accordance with National Institude of Health (NIH), Centers for Disease Control and Prevention (CDC) and World Health Organization (WHO). The reverse BMI calculator helps in managing the target body mass index either by balancing the weight or height. It is also useful in losing or gaining weight for physical fitness.