What BMI Is Obese?
For most adults, a BMI of 30 or above is classified as obese.
Obesity
Obesity BMI Calculator
This obesity BMI calculator helps you check whether your BMI falls within the obesity category for adults.
Your BMI Result
Fill in your height and weight, then click calculate to view your BMI result and healthy weight range.
Obesity BMI Formula
Metric: BMI = weight (kg) ÷ height² (m²)
Imperial: BMI = (weight (lbs) ÷ height² (in²)) × 703
Obesity BMI Categories
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | < 18.5 | Possible nutritional deficiency |
| Normal Weight | 18.5 – 24.9 | Low risk |
| Overweight | 25 – 29.9 | Moderate risk |
| Obese | ≥ 30 | High risk |
Frequently Asked Questions
The Body Mass Index (BMI) is a screening tool used to identify whether an adult is underweight, at a healthy weight, overweight, or obese. It is calculated by dividing a person’s weight in kilograms by the square of their height in meters.
A BMI of 30 or above is generally classified as obese for adults.
No. BMI is a screening tool and is not a complete medical diagnosis.
If you have concerns about your BMI or health risks, consult a healthcare professional.
Explore Similar Calculators
Browse related calculator variations and find the version that matches your preferred units or use case.
BMI Calculator with Feet and Inches
Calculate BMI using feet, inches, and pounds.
Open calculator
BMI Calculator for Men
Calculate BMI with guidance tailored for men.
Open calculator
Male BMI Calculator
Estimate male BMI using height and weight.
Open calculator
BMI Calculator by Height and Weight
Calculate BMI directly from height and weight.
Open calculator
Check Out Other Calculators
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Open calculator
Percentage Calculator
Solve percentage-based problems quickly, including increases, decreases, and proportions.
Open calculator
Discount Calculator
Figure out final prices and total savings when discounts are applied.
Open calculator
Date Calculator
Calculate the duration between two dates for planning and timeline management.
Open calculator