BMI Calculator – check Your Body Mass Index (UK)
Use our simple and accurate BMI Calculator based on NHS UK Guidelines
How BMI Works
BMI (Body Mass Index) is a simple calculation using height and weight. It helps determine whether a person has a healthy weight for their height.
BMI Table Section
|
BMI Range |
Category |
|---|---|
|
Below 18.5 |
Underweight |
|
18.5 – 24.9 |
Healthy weight |
|
25 – 29.9 |
Overweight |
|
30 or above |
Obese |
What Is BMI?
BMI (Body Mass Index) is a numerical value derived from weight and height. It helps determine whether an adult has a healthy body weight for their height.
How Is BMI Calculated?
BMI is calculated using the formula: weight (kg) / height (m²). Our tool uses this NHS-approved calculation.
Is BMI Accurate?
BMI is a useful screening tool but does not directly measure body fat. Factors like muscle mass and bone density can affect results.
BMI Limitations
- Does not differentiate muscle from fat.
- Not ideal for athletes.
- Not accurate for pregnant women.
- Not ideal for very short or tall individuals.
BMI According to NHS UK
The NHS uses BMI to assess healthy weight ranges in adults aged 18 to 65. It is widely accepted in UK health assessments.