What is Illinois's obesity rate?

About 28.4% adult obesity rate (CDC BRFSS, 2024).

What is the average BMI in Illinois?

About 28.3 in this project’s embedded 2026 dataset.

What BMI is considered obese?

BMI ≥ 30 is the common adult threshold for obesity categories.

Is BMI accurate for athletes?

BMI can overestimate risk for muscular people because it doesn’t separate muscle from fat.

How should I use BMI?

As a trend line over time, paired with other metrics and clinician guidance when needed.

BMI Calculator for Illinois Residents — Free 2026 Tool

If you're using the bmi calculator in Illinois, real local context matters. Illinois has an adult obesity rate of about 28.4% and an average BMI near 28.3, which can help you benchmark population context. BMI is a screening metric, not a diagnosis, but it’s useful for tracking trends—especially when paired with lifestyle inputs and measurements over time. Use this tool to calculate your BMI and then interpret it carefully alongside your goals and overall health picture.

BMI Calculator - Body Mass Index

Calculate your BMI and get personalized health recommendations

Height

Feet

Inches

Weight (pounds)

BMI Formula:

BMI = weight (kg) ÷ height² (m²)
Or in imperial: weight (lbs) × 703 ÷ height² (inches²)

Your BMI

25.1

Overweight

Healthy Weight Range:

125 - 169 lbs

BMI Scale

▼ You

1518.5253040

Health Recommendation:

Consider increasing physical activity and focusing on portion control. Small, sustainable changes can make a significant difference.

📊 Illinois at a Glance

Adult Obesity Rate

28.4%

Avg BMI

28.3

Cost of Living Index

94.3

Avg Household Income

$69,187

How to Use This Calculator

Enter height and weight, then review your BMI category. Use the state stats box to benchmark population context, but track your own trend over time.

How BMI Calculator Is Calculated

BMI is a screening ratio based on height and weight. It’s simple, but it does not measure body composition directly.

BMI = weight(kg) / height(m)^2

Using This Calculator in Illinois

Illinois has an adult obesity rate of about 28.4% and an average BMI around 28.3 (CDC BRFSS, 2024). Use that context to understand population baselines, not as a personal diagnosis.