BMI Calculator — Know Your Healthy Weight Range
Calculate your Body Mass Index, see where you fall on the BMI scale, and find your healthy weight range — in seconds.
Track Your Progress in the App
Log your weight, snap photos of your meals, and see your calorie trends — all in one place. MyBiteIQ syncs your nutrition and weight data to Apple Health.
⬇ Download MyBiteIQ FreeWhat is BMI?
Body Mass Index (BMI) is a simple screening number calculated from your height and weight: BMI = weight(kg) ÷ height(m)². It sorts people into ranges — underweight, normal, overweight, and obese — and gives a quick sense of whether your weight is in a generally healthy zone for your height.
BMI categories
- Under 18.5 — Underweight
- 18.5–24.9 — Normal (healthy) weight
- 25–29.9 — Overweight
- 30 and above — Obese
The limits of BMI
BMI is a screening tool, not a diagnosis. Because it only uses height and weight, it can misclassify muscular people as “overweight” and doesn't account for age, sex, ethnicity, or where you carry fat. Use it as a starting point, not the last word — and consult a healthcare professional for a full assessment.
What to do with your BMI
If you want to change your weight, the next step is a calorie target. Use our calorie calculator to find your TDEE and daily goal, then track consistently. MyBiteIQ makes logging painless with AI photo scanning and syncs your weight trend to Apple Health so you can see real progress over weeks — not just react to a single day on the scale.