BMI is your weight divided by your height squared. It sorts adults into four WHO ranges. Underweight is below 18.5. Healthy is 18.5 to 24.9. Overweight is 25 to 29.9. Obese is 30 or above. This calculator also shows your healthy weight range for your height. BMI cannot tell muscle from fat, so athletes can score high without excess fat.
BMI = weight (kg) ÷ height (m)². Ranges follow WHO classifications.
These are estimates for general information only, not medical advice. Consult a healthcare professional if you have a medical condition.
BMI divides weight in kilograms by height in metres squared. WHO categories describe adult screening ranges; they do not diagnose health.
Use unrounded BMI for the category.
BMI = kg ÷ (height in metres)².
Use the same height to calculate both ends.
18.5 × height² to 24.9 × height², in kilograms.
| Adult category | BMI |
|---|---|
| Underweight | Below 18.5 |
| Healthy | 18.5 to below 25 |
| Overweight | 25 to below 30 |
| Obese | 30 or above |
BMI does not distinguish muscle from fat; athletes may score high without excess fat. Children and teens need age- and sex-specific assessment.
BMI is your weight divided by your height squared. It sorts adults into four WHO ranges. Underweight is below 18.5. Healthy is 18.5 to 24.9. Overweight is 25 to 29.9. Obese is 30 or above. This calculator also shows your healthy weight range for your height. BMI cannot tell muscle from fat, so athletes can score high without excess fat.
It can overestimate fatness. BMI measures weight relative to height, not body composition.
Neither gives the whole picture. Both are estimates with different limitations.
This calculator uses BMI 18.5–24.9 at your height. It is not a personalised weight target.
WorkoutPlanMaker is built by an independent maker, not a clinic. Calculations use published formulas (Mifflin-St Jeor 1990 for BMR, U.S. Navy method for body fat, WHO ranges for BMI). Results are estimates for general information only, not medical advice. Talk to a healthcare professional before starting a new diet or exercise program.
