FOODMANAC · KNOW YOUR NUMBERS
BMI Calculator
Calculate adult body mass index from height and weight and view the corresponding CDC screening category.
Your details
YOUR ESTIMATE
Start with your details
Enter your measurements to see the calculation and its assumptions.
Connect your numbers to real food
Search Foodmanac’s existing food database. Choose the correct preparation and compare its recorded nutrient basis with a portion you actually eat.
How to use this bmi calculator
BMI cannot distinguish muscle from fat or describe fat distribution. The category is one screening input, not a diagnosis or an instruction to change weight.
Formula and assumptions
BMI = weight in kg ÷ height in meters squared. Categories use unrounded BMI: below 18.5, 18.5–<25, 25–<30, 30–<35, 35–<40 and 40 or above.
Example calculation
At 70 kg and 175 cm, BMI = 70 ÷ 1.75² = 22.86 kg/m², within the adult healthy-weight screening category.
Frequently asked questions
Can children use this calculator?
No. Children and teenagers need age- and sex-specific assessment.
Does a healthy-range BMI guarantee good health?
No. Health assessment also considers factors that BMI does not measure.
Sources and methodology
Source-backed equations are distinguished from Foodmanac planning presets. No result is an exact measurement or a medical prescription. Content version: 1.0.0.
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- Body Fat Calculator
- Ideal Weight Calculator
- TDEE Calculator
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