BMI Calculator
Find out your BMI, and what it means, with our easy calculator.
BMI Calculator
Choose your measurement preference then enter your height and weight to calculate your BMI
What is BMI?
BMI stands for body mass index which is a formula which relates Body Weight to height. This enables people to determine whether they are at a weight which is healthy for them.
What Your BMI Calculation Means
| Under 18.5* | Underweight |
| 18.5* - 25 | Healthy Weight |
| 25 - 30 | Overweight |
| 30 - 40 | Obese |
| Over 40 | Severely obese |
* There are two different ranges for healthy BMI put forward by different, but respected, sources. The British Nutrition Foundation, for example, gives 20-25 as healthy range and less than 20 as underweight. The Food Standards Agency's BMI calculator gives 18.5-25 as healthy and less than 18.5 as underweight. Cancer Research UK gives both ranges in different sections of its website. It seems that we can be a bit relaxed about a BMI of between 18.5 and 20, and not start worrying about being underweight unless BMI is less than 18.5.
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Sam was 19st 12lb, now 12st 6lb
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Yes… You need to lose weight
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You have a BMI of - a BMI of 20-25 is considered healthy.
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Yes… You need to lose weight
Your weight is significantly above your healthy weight range.
You have a BMI of - a BMI of 20-25 is considered healthy.
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Yes… You need to lose weight
Your weight is above your healthy weight range.
You have a BMI of - a BMI of 20-25 is considered healthy.
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Yes… You should lose weight
Your weight is above your healthy weight range.
You have a BMI of - a BMI of 20-25 is considered healthy.
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Maybe… Just a little
Your weight is within your healthy weight range.
You have a BMI of - a BMI of 18.5-25 is categorised as healthy.
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Your weight is within your healthy weight range.
You have a BMI of - a BMI of 18.5-25 is categorised as healthy.
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Your weight is within your healthy weight range.
You have a BMI of - a BMI of 18.5-25 is categorised as healthy.
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No… You need to gain weight
Your weight is below your healthy weight range.
You have a BMI of - a BMI of less than 18.5 is categorized underweight.
You should not try to lose any weight, and putting on a few pounds may benefit your health.
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