Here is an easy-to-use BMI calculator that anyone can use.
Whether you know your height and weight in centimeters, feet, kilograms, or pounds, you can use any combination to find out your BMI in the blink of an eye.
BMI Calculator
Your BMI:
Please enter your details to calculate BMI
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How our BMI calculator works:
This BMI calculator is fast and easy to use. You enter your data in the given field and hit calculate to figure out your BMI.
It also tells you whether you're underweight, normal, overweight, or obese, based on your height and weight.
Understanding BMI: Why Context Matters
In the first step, you can select your gender. While we use the same formula to calculate BMI for both men and women, as it's based on a universal standard, there are key differences in body composition that are worth understanding.
Men generally have a higher muscle-to-fat ratio, while women naturally tend to have a higher body fat percentage. So even if two people (a man and a woman) have the same BMI within the “normal” range, the amount of fat and muscle in their bodies may differ.
Let’s take an example:
A woman who regularly works out and has a BMI of 24 likely has more muscle and less fat.
Another woman with the same BMI who doesn’t exercise may have more body fat and less muscle.
This highlights an important point: BMI is a helpful tool, but not a full picture of health. Your lifestyle plays a big role.
For instance, I go to the gym and currently have a BMI of 24.4. My goal is to increase muscle mass, even if that means gaining more weight — not fat, but muscle.
On the other hand, someone who doesn’t exercise might aim to maintain or reduce their BMI to avoid gaining fat.
The Bottom Line
BMI is a great general indicator, but it should be interpreted based on your lifestyle, fitness goals, and body composition. Whether you're working out or not, keeping an eye on your BMI can help you stay on track with your health goals.
BMI Formula:
You should first understand how we calculate BMI. It's quite simple and with formula you can calculate BMI of any person manually.
BMI (Metric): BMI = weight (kg) / height (m)2
BMI (Imperial): BMI = (weight (lbs) × 703) / height (in)2
But as I said, still the same BMI can have different meanings based on the context.
Height:
In the next step, you can select your height.
You have three options to input your height:
- Centimeters – This is commonly used in many countries, including the USA.
- Inches – You can enter your height in inches directly, or choose the "feet and inches" option. If you select feet and inches, simply enter the number of feet and inches (e.g., 5 feet 7 inches). Alternatively, if you only know your height in inches, enter the number of inches and set feet to "0".
Weight:
Next, you can input your weight, either in kilograms (kg) or pounds (lbs). No matter where you're from, whether you use kilograms or pounds, this calculator allows you to calculate your BMI accurately.
Calculate:
When you calculate your BMI, you will not only get your BMI value but also a classification of your weight status: underweight, normal weight, overweight, or obese.
Additionally, based on your gender, the result can give you an idea of whether you may have more muscle or fat. This helps provide a clearer context for your BMI, taking into account natural differences in body composition between men and women.
What Makes Our BMI Calculator the Best for Everyone?
It's true—calculating BMI isn't complicated, and anyone who knows the formula can use a basic calculator to do it.
But we've taken it a step further by making our BMI calculator extremely easy to use. No matter how you know your height and weight—whether in feet and inches, centimeters, kilograms, or pounds—our calculator does all the conversions for you automatically.
That means you don't need to manually convert any measurements. Just enter the values you know, and let our tool handle the rest.
This makes it ideal for people all over the world who want a quick and hassle-free way to check their BMI.
And importantly, we respect your privacy. We don’t store or track any of the data you enter—everything happens right on your device, so you can use it with complete confidence.