BMI Calculator
Calculate your Body Mass Index (BMI) in seconds using height and weight. This is an educational screening tool to help you understand your weight category—not a medical diagnosis.
Tip: If you want calories/macros and disease-aware guidance, use the premium report flow.
What this BMI calculator does
BMI is calculated as weight (kg) divided by height (m) squared. It gives a quick estimate that helps many people understand whether they may be underweight, in a normal range, overweight, or obese.
If your BMI is high or low, don’t panic—use it as a starting point. Consider activity level, waist size, diet patterns, and consult a clinician for personalized advice.
No login
Instant results
Inputs
Height + Weight
Next step
Get calories/macros
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Note: Calculations are for educational purposes. We don't store your health data locally or on our servers.
Ready for a complete health plan—not just a number?
Turn your BMI + calculator results into actionable targets: calories & macros, a simple meal-plan outline, and condition-aware guidance—plus a downloadable report.
Important note
BMI is not a diagnosis. If you have symptoms, pregnancy, chronic disease, or sudden weight change, please consult a qualified clinician.
Frequently Asked Questions
Is the BMI calculator free?
Yes. This BMI calculator is free and works instantly—no login required.
What is a healthy BMI range?
For many adults, a BMI between 18.5 and 24.9 is often considered in the “normal” range. But BMI is only a screening number—age, muscle mass, pregnancy, and medical history can change how it should be interpreted.
What inputs do I need for BMI?
You only need height and weight. The calculator then estimates BMI and shows the category (underweight/normal/overweight/obese).
Is BMI accurate for everyone?
BMI can be less accurate for athletes, older adults, and people with higher muscle mass. It’s useful as a quick check, but you should use it alongside waist measurements, activity level, and doctor advice.
Can I get calories, macros, and a meal plan too?
Yes. Use the AI Health Report to get calorie and macro targets, lifestyle guidance, and a structured premium report preview (guests can preview; login is needed for premium actions).