Can I use this tool for children or teenagers?

No, this specific calculator is designed for adults 20 and older. For children and teens ages 2 through 19, the CDC provides a separate BMI Calculator for Children and Teens.

Do I need to create an account to use the BMI calculator?

No account or payment is required. The tool is publicly accessible on the CDC website at no cost.

What happens if I enter a height or weight outside the allowed range?

The calculator will prompt you to check the accuracy of the information entered and will only accept heights between 3 and 9 feet (or 91.44 and 274.32 cm) and appropriate weight ranges.

Body Metrics & FitnessTool Review

BMI Calculator – Body Mass Index

Provided byCenters for Disease Control and Prevention (CDC)cdc.gov

CDC provides a free adult BMI calculator using either U.S. customary or metric units. It returns your BMI value and c...

One of 6 options for BMI Calculator – Body Mass Index

Use This Tool

BMI calculators

Screenshot of BMI Calculator – Body Mass Index on Centers for Disease Control and Prevention (CDC) — cdc.govOpen the live tool →

About this tool

What BMI Calculator – Body Mass Index does

The CDC Adult BMI Calculator determines an individual's Body Mass Index using height and weight inputs. Users receive a numerical BMI score paired with its corresponding category—underweight, healthy weight, overweight, or obese—and can choose between U.S. customary or metric units. The result includes a brief explanation that BMI is one potential health indicator and should be considered alongside other factors like medical history and physical exam findings. The page also notes that the tool is intended for adults 20 and older, with a separate calculator available for children and teens. All features are provided at no cost, with no account or payment required.

Step by step

How to use the Centers for Disease Control and Prevention (CDC) BMI Calculator – Body Mass Index

1
Select the unit system: US Customary Units or Metric Units
2
Enter height in feet and inches (or centimeters) within the specified ranges
3
Enter weight in pounds (or kilograms) within the accepted range
4
Click Calculate to view the BMI value and corresponding category
5
Review the on-screen interpretation and limitations text

Is it right for you

Best for

Adults aged 20 and older who want a free, government-backed BMI assessment without creating an account or paying fees.

Limitations

Intended for adults only; separate tool required for children and teens
BMI is a screening tool, not a diagnostic test; results should be discussed with a healthcare provider
No unit conversion between U.S. customary and metric systems within a single calculation

Questions

BMI Calculator – Body Mass Index FAQ

Is the CDC BMI calculator accurate for everyone?: The calculator provides a standard BMI value based on height and weight, but the CDC notes that BMI should be considered alongside other factors like medical history and physical exam findings, and is not a substitute for professional medical advice.
Can I use this tool for children or teenagers?: No, this specific calculator is designed for adults 20 and older. For children and teens ages 2 through 19, the CDC provides a separate BMI Calculator for Children and Teens.
Do I need to create an account to use the BMI calculator?: No account or payment is required. The tool is publicly accessible on the CDC website at no cost.
What happens if I enter a height or weight outside the allowed range?: The calculator will prompt you to check the accuracy of the information entered and will only accept heights between 3 and 9 feet (or 91.44 and 274.32 cm) and appropriate weight ranges.

Other Options

More BMI Calculator – Body Mass Index tools

Compare all →

Keep Exploring

Similar tools

Based on shared tags

BMI Calculator for Men5 options

Calculates your Body Mass Index (BMI) using height and weight inputs, providing an instant assessment of body composition metrics. The tool supports both male and female user selections and accommodates various unit systems for precise calculations. Beyond standard BMI, it generates expanded health indices such as BMI Prime and the Ponderal Index, offering a comprehensive view of your current body metrics. It also provides immediate classification based on established adult BMI categories for accurate interpretation. Individuals interested in tracking their physical fitness or monitoring general health status utilize this tool to guide lifestyle decisions. By comparing their calculated score against provided healthy range guidelines, users gain valuable insights into whether their weight and height fall within optimal parameters.

5 options💪 Body Metrics & Fitness

BMI Calculator for Teens6 options

Calculates Body Mass Index (BMI) for teens using CDC percentile categories designed for ages two through twenty. The tool accepts various measurements and provides immediate BMI output, supporting multiple unit formats to ensure accurate results regardless of user preference. It distinguishes between adult and child modes, providing a comprehensive health metric tailored specifically for adolescent growth stages. Uses this calculator anyone monitoring the physical development of a young person. Parents, guardians, or healthcare providers can use it to track healthy weight ranges and understand developmental milestones relative to standard pediatric guidelines. The resource helps users quickly assess body metrics in an easy-to-read format, supporting informed discussions about fitness and overall health.

6 options💪 Body Metrics & Fitness

BMI Calculator for Women6 options

Calculates an individual’s Body Mass Index (BMI) specifically tailored for women using either US customary or metric units. The tool accepts height and weight measurements to provide an accurate BMI score, which is then interpreted using established WHO-based adult classification tables. Beyond just the raw number, it delivers a comprehensive understanding of body metrics by providing estimated healthy weight ranges and supplementary context like the BMI Prime measure for detailed analysis. Individuals interested in monitoring their fitness progress or maintaining a healthy weight benefit from this precise calculation tool. It offers reliable data points that help users assess whether their current measurements fall within established healthy guidelines or require adjustment.

6 options💪 Body Metrics & Fitness

BMI Calculator for Kids6 options

This free NHS calculator checks BMI for children and teenagers aged 2 to 17, covering both girls and boys including age 9. It uses child-specific inputs such as date of birth, sex at birth, height, and weight to provide guidance. The page also explains who should use the tool and limitations of BMI interpretation.

6 options💪 Body Metrics & Fitness

BMI Weight Loss Calculator5 options

Calculates an individual’s Body Mass Index (BMI) using current weight and height measurements. The tool provides not only the resulting BMI category but also a recommended healthy weight range tailored to the user's specific height. Furthermore, it allows users to estimate the necessary weight loss required to achieve a target BMI, typically aiming for a healthier range below 25. Calculations are performed instantly within the browser and support both US customary units and metric measurements for global usability. Individuals interested in monitoring their body metrics and tracking progress toward fitness goals can use this resource. People who need an accurate starting point or general guidance on safe weight loss targets appreciate its dual functionality of assessing current status while suggesting a measurable path forward.

5 options💪 Body Metrics & Fitness

Geriatric BMI Calculator

Calculates Body Mass Index (BMI) specifically tailored for individuals over the age of 65. The tool accepts height and weight measurements to provide an accurate BMI score, which is then used to determine a person's current weight status. It classifies results into categories such as underweight, healthy weight, or overweight based on established geriatric health guidelines, offering users immediate insight into their general body metrics. Uses the specialized metric for older adults who require more nuanced assessment than standard BMI charts provide. Individuals over 65, caregivers, and healthcare professionals can utilize this calculator to monitor changes in a person's weight status over time. It helps ensure that nutritional assessments and health monitoring are performed using guidelines appropriate for the unique physiological needs of the senior population.

1 option💪 Body Metrics & Fitness