Can I use this calculator for a child under age 2?

No, the child mode is designed for ages 2 to 19 only; younger children require a different growth assessment method.

Does the tool provide a exact BMI category or just a range?

It assigns a category based on the calculated BMI value: underweight (below 18.5), healthy weight (18.5–24.9), overweight (25.0–29.9), and obese (30.0 and above).

Is the BMI percentile accurate for my child’s exact age and sex?

The calculator uses CDC growth-chart-based percentile methods for the entered age and sex, but results are standardized estimates and not a substitute for a pediatrician’s evaluation.

Can I switch between metric and imperial units mid-calculation?

Yes, the tool accepts weight and height in multiple units and performs conversions internally, so you can mix units as needed.

Body Metrics & FitnessTool Review

BMI Percentile Calculator

Provided byCalculator Soupcalculatorsoup.com

This BMI tool includes adult and child modes, with child calculations for ages 2-19. It presents child BMI percentile...

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Percentile calculators

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About this tool

What BMI Percentile Calculator does

The BMI Calculator on Calculator Soup computes body mass index from weight and height, supporting adult and child modes for ages 2 to 19. It accepts weight in pounds, kilograms, or stones and height in inches, feet, centimeters, or meters, then displays the BMI value, the standard weight category (underweight, healthy weight, overweight, obese), and, for children, the BMI percentile with CDC-based interpretation bands. The tool is free to use without a subscription and includes formula references and unit conversions. Users receive a numeric BMI result plus a clear weight-status label, with pediatric results adding a percentile rank and categorical guidance. Compared to other BMI tools, this site’s version stands out for its dual adult/child toggle, broad unit selection, and embedded formula explanations on the same page, all without requiring an account or payment.

Step by step

How to use the Calculator Soup BMI Percentile Calculator

1
Select Adult or Child mode on the Calculator Soup BMI page
2
Enter weight using pounds, kilograms, or stones
3
Enter height using inches, feet, centimeters, or meters
4
View the calculated BMI, weight category, and percentile (if child mode) on the results area

Is it right for you

Best for

This tool suits anyone needing a quick, free BMI check for adults or children, especially users who want unit flexibility and built-in percentile interpretation without creating an account.

Limitations

No saving or history of past calculations
Percentile data relies on CDC growth charts and may not reflect all populations
Results are estimates and not a medical diagnosis

Questions

BMI Percentile Calculator FAQ

Can I use this calculator for a child under age 2?: No, the child mode is designed for ages 2 to 19 only; younger children require a different growth assessment method.
Does the tool provide a exact BMI category or just a range?: It assigns a category based on the calculated BMI value: underweight (below 18.5), healthy weight (18.5–24.9), overweight (25.0–29.9), and obese (30.0 and above).
Is the BMI percentile accurate for my child’s exact age and sex?: The calculator uses CDC growth-chart-based percentile methods for the entered age and sex, but results are standardized estimates and not a substitute for a pediatrician’s evaluation.
Can I switch between metric and imperial units mid-calculation?: Yes, the tool accepts weight and height in multiple units and performs conversions internally, so you can mix units as needed.

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