NHS BMI Calculator UK – Check Your Healthy Weight Online

NHS BMI Calculator Tool

Check your Body Mass Index

Calculate your BMI with our easy-to-use tool and get insights about your weight in relation to your height.

BMI Calculator

Enter your height and weight below

Centimeters

Feet & Inches

Height

Kilograms

Pounds

Weight

Your Result

24.2

Your BMI

Healthy weight

Understanding Body Mass Index

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. It’s used as a screening tool to identify potential weight problems in adults.

BMI Categories:

● Below 18.5 – Underweight

● 18.5 to 24.9 – Healthy Weight

● 25 to 29.9 – Overweight

● 30 or Higher – Obese

Note: BMI is just one measurement and doesn’t account for factors like muscle mass, bone density, or overall body composition.

Benefits

Why check your BMI?

Body Mass Index is an important measure that can help you understand your health status and potential risks associated with your weight.

Take the first step towards a healthier you

What is the NHS BMI Calculator?

Our NHS BMI Calculator checks if our weight is healthy.

It uses height and weight to show our BMI. Based on NHS guidance, this tool helps us track body fat level and understand weight-related health risks fast.

How does our BMI calculator work?

It compares weight to height.

We enter our weight and height. The calculator uses the NHS BMI formula. It then shows our category from underweight to obese.

Why use the NHS BMI formula?

It follows UK health standards.

This formula is trusted by the NHS. It helps us check if our weight is in a healthy range. It works for all UK adults.

What are the BMI categories?

They group weight by health risk.

Underweight: BMI under 18.5
Healthy: 18.5 to 24.9
Overweight: 25 to 29.9
Obese: 30 or more

Is BMI a reliable health measure?

Yes, it gives a general risk picture.

BMI shows body fat level. It helps us spot health risks. But we should also check other signs like waist size and activity level.

What units does the tool support?

Metric and imperial units.

We can use kg, stone, cm, feet, and inches. It converts them for us. This makes it easy for anyone in the UK to use.

Can BMI change over time?

Yes, it changes with weight or height.

As we gain or lose weight, our BMI changes. It's good to check it often. Tracking BMI helps us stay in a healthy range.

Who should use this calculator?

All UK adults aged 18 or older.

This tool is made for adults. Children and teens need a different BMI chart. NHS websites have child BMI tools for parents.

BMI Chart: NHS Standard

BMI Range	Category	Health Risk
Under 18.5	Underweight	Nutritional concern
18.5 – 24.9	Healthy	Low risk
25 – 29.9	Overweight	Moderate risk
30 or more	Obese	High risk

Key Takeaways:

Our tool checks BMI using NHS standards.
It shows health risk based on weight.
We support metric and imperial inputs.
Results match NHS adult BMI guidance.
It’s fast, free, and easy to use.