Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Health, Fitness & Wellness
Children's BMI Calculator by Age and Sex
BMI compared to age/sex growth curves (simplified percentile model).
Estimate a child's BMI percentile from age, sex, height, and weight. Estimates only—not a diagnosis or prescription.
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Inputs save on this device only. Share a link to reopen your exact numbers.
Inputs
217
01
30250
3078
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: BMI = 22.9. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
Scenario studio
Compare A vs B
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Scenario A
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Scenario B
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Health check-in history
Private on this device only. Not a medical diagnosis or treatment advice — talk to a qualified clinician for health decisions.
No snapshots yet — save one to track change over time.
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Age (years)
Length of the repayment schedule.
Sex (0=F, 1=M)
The “Sex (0=F, 1=M)” value used in this tool’s formula. Adjust it to see results update live.
Weight (lbs)
The “Weight (lbs)” value used in this tool’s formula. Adjust it to see results update live.
Height (in)
The “Height (in)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Estimate a child's BMI percentile from age, sex, height, and weight. Estimates only—not a diagnosis or prescription. BMI compared to age/sex growth curves (simplified percentile model). Example: Age 10, 95 lb, 54 in → BMI ~20 with an estimated percentile band.
BMI compared to age/sex growth curves (simplified percentile model).
Example: Age 10, 95 lb, 54 in → BMI ~20 with an estimated percentile band.
When to use this Children's BMI
Common use cases
- Estimate a child's BMI percentile from age, sex, height, and weight.
- Sanity-check with this case: Age 10, 95 lb, 54 in → BMI ~20 with an estimated percentile band.
- The relationship is: BMI compared to age/sex growth curves (simplified percentile model).
Localized examples
- Health, Fitness & Wellness: the example on this page uses the same formula as the widget.
What you get
- Fields: Age (years), Sex (0=F, 1=M), Weight (lbs), Height (in)
- BMI compared to age/sex growth curves (simplified percentile model).
- Example on the page: Age 10, 95 lb, 54 in → BMI ~20 with an estimated percentile band.
How to Calculate Children's BMI Step-by-Step
- 1Enter Age (years), Sex (0=F, 1=M), Weight (lbs), then the remaining fields. Use the values you have, not a catalog average, unless that is all you know.
- 2BMI compared to age/sex growth curves (simplified percentile model).
- 3Worked case: Age 10, 95 lb, 54 in → BMI ~20 with an estimated percentile band.
- 4If this number would change a drug, a diet, or a return-to-play call, take it to a clinician. The page never examined you.
Governing formula
BMI compared to age/sex growth curves (simplified percentile model).
Age 10, 95 lb, 54 in → BMI ~20 with an estimated percentile band.
Example: set Age (years) = 10, Sex (0=F, 1=M) = 0, Weight (lbs) = 95, then read the result.
Variable definitions
- ageYears
Age (years)
The “Age (years)” field. Default 10; typical range 2–17.
- sex
Sex (0=F, 1=M)
The “Sex (0=F, 1=M)” field. Default 0; typical range 0–1.
- weightLbs
Weight (lbs)
The “Weight (lbs)” field. Default 95; typical range 30–250.
- heightIn
Height (in)
The “Height (in)” field. Default 54; typical range 30–78.
- The formula (BMI compared to age/sex growth curves (simplified percentile model).) does not see labs, medications, sleep, or injury history. A clinician does.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
BMI compared to age/sex growth curves (simplified percentile model).
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Community
Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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