HEALTH
BMI and excess weight calculator
Enter sex, age, height, weight and waist circumference. The calculator shows BMI, approximate weight above the healthy BMI range and a waist risk assessment.
Why are sex and waist circumference needed?
The BMI formula is the same for men and women, so BMI itself does not change according to sex. The difference appears when assessing waist circumference: different thresholds are used for men and women because body fat distribution typically differs.
In this calculator, a waist circumference of 94 cm or more in men is considered an increased risk, and above 102 cm a high risk. For women, the increased-risk threshold is 80 cm and the high-risk threshold is above 88 cm. The calculator also shows the waist-to-height ratio; ideally, your waist should be less than half your height.
How is excess weight calculated?
The healthy weight range is based on the commonly used adult BMI range of 18.5 to 24.9. Approximate excess weight is the difference between the entered weight and the weight corresponding to a BMI of 24.9. Age is requested so the calculator is used only for adults; the standard adult BMI formula does not change with age.
The result is an estimate, not a diagnosis. BMI does not account for muscle mass, body build or other individual factors. This calculator is intended for adults aged 18 and over and is not intended for use during pregnancy.