Body Mass Index Calculator

Better understand your weight in relation to your height using our body mass index (BMI) calculator. While BMI is not the sole determinant of a healthy weight, it offers a valuable starting point to evaluate your overall health and well-being.

Enter your details below

Select unit
cm

Height should be between 0cm and 300cm

kg

Weight should be between 0kg and 500kg

ft

Feet should be between 0 and 9

in

Inches should be between 0 and 11

st

Stones should be between 0 and 50

lbs

Pounds should be between 0 and 13

Welcome!

Enter your height and weight and you’ll see your BMI result here.

a man is eating

What your BMI result means

You'll see recommendations here once you've entered your details.

Icon representing healthy eating
Healthy eating

Healthy eating promotes weight control, disease prevention, better digestion, immunity, mental clarity, and mood.

Icon representing exercise
Regular exercise

Exercise improves fitness, aids weight control, elevates mood, and reduces disease risk, fostering wellness and longevity.

Icon representing sleep
Adequate sleep

Sleep enhances mental clarity, emotional stability, and physical wellness, promoting overall restoration and rejuvenation.

Limitations of BMI

Although BMI is often a practical indicator of healthy weight, it is not suited for every person. Specific groups should carefully consider their BMI outcomes, and in certain cases, the measurement may not be beneficial to use.

Gender icon
Gender

The development and body fat composition of girls and boys vary with age. Consequently, a child's age and gender are considered when evaluating their BMI.

Gender icon
Age

In aging individuals, increased body fat and muscle loss may cause BMI to underestimate body fat content.

Gender icon
Muscle

BMI may misclassify muscular individuals as overweight or obese, as it doesn't differentiate muscle from fat.

Gender icon
Pregnancy

Expectant mothers experience weight gain due to their growing baby. Maintaining a healthy pre-pregnancy BMI is advisable to minimise health risks for both mother and child.

Gender icon
Race

Certain health concerns may affect individuals of some Black and Asian origins at lower BMIs than others. To learn more, it is advised to discuss this with your GP or practice nurse.