BMI Calculator
Calculate BMI with a visual gauge, body indicator, healthy weight range, and calorie estimator.
Enter your height and weight above to see your BMI, healthy weight range, target weight, and calorie estimate.
BMI = weight (kg) ÷ height² (m²)
About BMI Calculator
Free online BMI calculator with a visual speedometer gauge, body silhouette, healthy weight range, and target weight calculator. Supports metric (cm/kg) and imperial (ft/lbs) units. Includes a calorie needs estimator (BMR + TDEE) based on age, sex, and activity level.
How to Use
- 1Select Metric (cm/kg) or Imperial (ft/lbs) using the unit toggle.
- 2Enter your height and weight, then click "Calculate BMI".
- 3View your BMI on the speedometer gauge alongside your body silhouette indicator.
- 4Check the Healthy Weight Range card to see the ideal weight for your height.
- 5Use the Target Weight Calculator to see what weight achieves a specific BMI.
- 6Expand "Calorie Needs Estimator" and enter your age, sex, and activity level for BMR and daily calorie targets.
Frequently Asked Questions
What is BMI?
Body Mass Index (BMI) is calculated from your height and weight to estimate body fatness. Categories: Underweight (<18.5), Normal Weight (18.5–24.9), Overweight (25–29.9), Obese (≥30).
Are metric and imperial units both supported?
Yes. Enter height in centimeters or feet+inches, and weight in kilograms or pounds. The tool converts automatically.
What is a healthy BMI?
A BMI of 18.5–24.9 is generally considered healthy for adults. The tool also shows the exact healthy weight range for your specific height.
How does the Target Weight Calculator work?
Enter a target BMI (default 22) and the tool shows you the exact weight needed to reach that BMI at your current height, plus how much you need to gain or lose.
What is BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest, calculated using the Mifflin-St Jeor equation. TDEE (Total Daily Energy Expenditure) multiplies BMR by your activity level to estimate daily calorie needs.
Is BMI always accurate?
BMI is a useful screening tool but does not directly measure body fat. It may be less accurate for athletes (high muscle mass) or older adults. Always consult a healthcare provider for personalized medical advice.
Tool Info
- Category
- health
- Usage
- Unlimited