Use our free Reverse BMI Calculator to find the exact weight you need for any target BMI. Just enter your height and desired BMI score — get instant, accurate results.
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A Reverse BMI Calculator is a tool that tells you how much you should weight based on your height and your goal Body Mass Index (BMI). This calculator does the opposite: instead of telling you your BMI based on your height and weight, it tells you how much weight you need to lose to reach a certain BMI.
People who want to do the following will find this type of calculator very useful:
You can find out how much weight you need to lose to get to that BMI by entering your height and choosing a target BMI.
Body Mass Index or BMI is a common way to figure out how much body fat you have based on your height and weight. People all over the world use it to easily put people into weight groups.
BMI = Weight (kg) ÷ Height² (m²)
18.5–24.9 is a normal weight range. 18.5 and below is an underweight range. Overweight: 25 to 29.9 Obese (Class 1): 30–34.9 Obese (Class 2): 35–39.9 40+ Very Overweight
Reverse BMI calculation means figuring out the right weight based on the following:
It finds out weight from BMI instead of the other way around.
Weight = BMI × Height² in Reverse
This formula helps people figure out how much they should weight to reach a certain BMI.
The Reverse BMI Calculator can help you:
It gives people who want to be healthier a clear goal to work toward.
The calculator takes the information you give it and uses the reverse BMI formula on it.
It takes:
You can also make the output more personal by choosing the unit and biological sex.
Height is the most important thing you need to know to do the maths.
The calculator can handle more than one unit:
Height has a direct effect on BMI.
Even small changes in height can make a big difference in the end result.
You can choose what the calculator does:
The method for calculating BMI stays the same, but biological differences can change:
This input helps us understand the results.
You can see the result in:
Different places have different ways of measuring things. This choice makes sure that the results are easy to understand.
With the calculator, you can use a slider to pick a target BMI.
The range usually includes:
The healthy BMI range is:
👉 18.5 to 24.9
It is usually best to pick a BMI goal that is in this range.
The calculator tells you:
This helps people find out if their goal is healthy or not.
Example 1: Height = 170 cm (1.7 m) • BMI goal = 22
How to find out:
Weight = 22 times 1.7 squared. Weight = 22 times 2.89.
Weight: 63.58 kg
Result:
Required weight: approximately 63.6 kg
Example 2: The height is 180 cm (1.8 m). • Goal for BMI = 25
Weight = 25 × (1.8)²
Weight = 25 times 3.24. The weight is 81 kg.
Example 3: Height: 160 cm (1.6 m); BMI goal: 18.5
Weight = 18.5 × (1.6)²
Weight = 18.5 × 2.56
47.36 kg is the weight.
If your BMI is less than 18.5, you are underweight.
Possible risks:
A BMI of 18.5 to 24.9 is considered normal weight.
Being overweight (BMI between 25 and 29.9)
Could cause:
Overweight (BMI ≥ 30)
Related to:
Sets a clear goal for weight.
Tells you how much weight you need to lose.
It helps people who are too thin.
Makes it easier to understand BMI.
Needs very little help.
Using a standard formula.
Works with more than one unit.
Helps you make goals that you can actually reach.
It may look like athletes are overweight.
Doesn't show where fat is on the body.
Doesn't think about age or genetics.
Making plans for your weight.
Following along.
Finding out what weight you want to be.
Helping people make decisions about their health care.
To keep track of your goals.
To make a plan to cut back.
To gain weight.
To make a quick guess.
It's bad for your health to set BMI goals that are too high.
Not paying attention BMI is just one sign of overall health.
The context is important.
Reverse BMI is all about:
The ideal weight takes into account:
Input: Weight and Height, Height and BMI
The value of BMI is the output.Weight required
Setting goals, classifying, and figuring out why
Reverse BMI is very important for:
A person who is 175 cm tall wants to lower their BMI to 23.
It's important to know how much muscle you have compared to fat.
Changes in weight are affected.
What you eat and how much you move around affect the results.
You can use the Reverse BMI Calculator to find out how much weight you need to lose to reach your target BMI. It helps people make smart plans for their fitness journeys and set goals.
A Reverse BMI Calculator helps you figure out what your weight goals should be based on your BMI. It can help you figure out how to lose or gain weight.
To get the best results: