Healthy weight calculator

A healthy weight depends on your height. The NHS healthy-weight band is a BMI of 18.5 to 24.9, which FitCalcs converts into a weight range in kilograms for your exact height. Enter your current weight too and it shows how far you sit from the band. BMI is a population screen, not a diagnosis: it does not separate muscle from fat, so very muscular people can sit above the band while still being lean. This is general information, not a medical assessment.

Height (cm) Current weight (kg) (optional)

Show my healthy range

How this is worked out

The NHS healthy-weight band is a BMI of 18.5 to 24.9. Rearranging the BMI formula gives the weight range for your height:

lower kg = 18.5 x (height_m)^2
upper kg = 24.9 x (height_m)^2

BMI is a population screen, not a diagnosis: it does not separate muscle from fat, so very muscular people can sit above the band while still being lean. The NHS pairs it with waist-to-height ratio for that reason.

Informational only, not a medical assessment. Editorially reviewed by FitCalcs, with each figure citing its source.

For context, about 64% of UK adults are overweight or living with obesity and 29% live with obesity (NHS Health Survey for England 2022). See the full breakdown by sex and age in the UK fitness and body benchmarks.