Reverse BMI Calculator – Find Weight from BMI & Height

Most calculators tell you your BMI after entering weight and height. But what if you already know the BMI you want and need to figure out the right weight? That’s exactly what this Reverse BMI Calculator does. Enter your height and target BMI, and it will instantly calculate the weight you should aim for—whether in kilograms or pounds.

What is a Reverse BMI Calculator?

A reverse BMI calculator is a tool that works the opposite way of a normal BMI calculator.

• A regular BMI calculator takes your height and weight, then gives you your Body Mass Index.
• A reverse BMI calculator does the reverse: you enter your height and your desired BMI, and it tells you what your weight should be.

This is helpful if you want to know:

• “What weight should I be for a BMI of 22?”
• “If I’m 5’8, how much should I weigh to be in the healthy BMI range?”
• “What height would I need to be for this weight to equal a BMI of 25?”

That’s why people search for things like:

• bmi reverse calculation
• reverse calculate bmi
• reverse bmi calculator for height
• reverse bmi calculator for weight

Our free tool on this page does both: a standard BMI calculator and a reverse BMI calculator.

What is BMI?

BMI stands for Body Mass Index. It’s a number calculated from a person’s weight and height.

Formula: BMI=Weight(kg)Height(m)2BMI = \frac{Weight (kg)}{Height (m)^2}

It’s a quick way to check if you’re underweight, normal weight, overweight, or obese.

Even though BMI has its limitations (it doesn’t measure muscle vs fat), it’s still widely used in healthcare and fitness.

What is a BMI Calculator?

A BMI calculator is a tool that makes this math automatic. Instead of calculating by hand, you just enter your height and weight, and it instantly shows your BMI.

Online BMI calculators often include:

• Metric (cm, kg) and Imperial (feet, inches, pounds) options.
• BMI category labels.
• Sometimes even charts and advice.

But what if you don’t want to know your BMI from your current weight, but instead want to know what weight you need for a target BMI? That’s where the reverse BMI calculator comes in.

How Does the Reverse BMI Calculator Work?

The reverse BMI calculator flips the formula:

Weight = BMI × (Height(m) × Height(m))

So if you know your height and your target BMI, you can instantly calculate your ideal weight.

Example:

• Height = 170 cm (1.70 m)
• Target BMI = 22
• Calculation: 22 × (1.70 × 1.70) = 63.6 kg

So, for a BMI of 22 at 170 cm height, your ideal weight is 63.6 kg.

This is why people search things like:

• reverse bmi calculator to find weight
• reverse calculate weight from bmi and height

Why Use a Reverse BMI Calculator?

Here are some practical reasons:

1. Set weight goals → Instead of guessing, you can see exactly what weight you need for a healthy BMI.
2. Plan fitness journey → Trainers and nutritionists use this to design diet/workout plans.
3. Medical purposes → Doctors sometimes use BMI targets for patients needing weight management.
4. Motivation → Knowing a specific number makes goals feel achievable.

Reverse BMI Calculator for Height

Some users want to flip the equation differently: given a BMI and a weight, what height would be required?

Formula: Height=WeightBMIHeight = \sqrt{\frac{Weight}{BMI}}

Example:

• Weight = 80 kg
• Target BMI = 22
• Height = √(80 ÷ 22) = 1.90 m = 190 cm

So, for 80 kg to equal a BMI of 22, you’d need to be 190 cm tall.

This is why queries like reverse bmi calculator to find height or reverse bmi calculator height exist.

Reverse BMI Calculator by Gender (Male & Female)

While BMI formula itself is gender-neutral, people still search for:

• reverse bmi calculator female
• reverse bmi calculator male

The math doesn’t change, but recommended BMI ranges may differ slightly in certain health guidelines. Generally:

• Both men and women → 18.5 – 24.9 is considered “normal.”
• Athletes (male or female) may naturally fall into “overweight” BMI despite being healthy, because BMI doesn’t measure body fat %.

Reverse BMI Calculator in Different Units

People use different measurement systems, so we’ve included:

• Reverse BMI calculator kg / metric → Standard (cm, kg).
• Reverse BMI calculator lbs / imperial → For U.S. users.
• Reverse BMI calculator ft and inches → Height entry in feet + inches.

Our tool above supports both metric and imperial conversions automatically.

How to Calculate Reverse BMI Manually

Want to double-check the calculator? Here’s how to do it step by step:

1. Convert your height into meters.
   • Example: 5 ft 8 in = 1.73 m
2. Square your height.
   • (1.73 × 1.73 = 2.99)
3. Multiply by your target BMI.
   • 22 × 2.99 = 65.8 kg

So, your target weight = 65.8 kg.

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FAQs About Reverse BMI Calculator

Q1: What is the difference between BMI calculator and reverse BMI calculator?

• BMI calculator → input height + weight → output BMI.
• Reverse BMI calculator → input height + BMI → output weight.

Q2: Can reverse BMI calculator be used for children?

No, children and teens use BMI-for-age percentiles, not standard BMI.

Q3: Is reverse BMI calculator accurate?

Yes, mathematically accurate. But remember, BMI itself doesn’t measure muscle, fat, or bone density.

Q4: Can I use reverse BMI calculator to set weight loss goals?

Yes, it’s one of the best ways to know your target healthy weight range.

Q5: Does BMI differ for men and women?

The calculation is the same. But body composition varies, so BMI may not reflect fitness level equally.

Conclusion

The Reverse BMI Calculator is a powerful tool for anyone who wants to find their ideal weight or target BMI. Instead of guessing, you can see the exact number your weight should be based on your height.

Whether you’re searching for:

• bmi reverse calculation
• reverse bmi calculator for height
• reverse bmi calculator for weight
• or simply “how to calculate reverse BMI”

—this tool gives you instant, accurate answers.

Use it above, test your numbers, and start planning a healthier lifestyle today.