Calculate a de-identified pediatric BMI and exact single-month-age percentile from the official CDC 2022 Extended BMI-for-Age parameters.
A quick decision brief for this specific tool
One de-identified source record containing the responsible CDC chart-sex selection, completed years, additional whole months and same-session standing height and weight
BMI, the exact sex- and single-month-age CDC percentile, the source P95 BMI, percent of P95 and the corresponding CDC screening range
Calculate metric BMI, select the bundled CDC 2022 Extended BMI-for-Age source row, use LMS through P95 and the CDC extended sigma method above P95; no annual-median approximation or age what-if is used
Choose your path
Reproduce a de-identified pediatric BMI-for-age screening record with the exact CDC sex- and single-month-age parameters instead of an invented percentile estimate.
Preserve exact month age, chart selection and same-session measurements while distinguishing screening from diagnosis.
Name the de-identified clinical record, copy completed years and months, the responsible chart selection, kilograms and standing centimeters.
Can compare BMI, percentile, P95 and percent-of-P95 to the reviewed record without an approximate annual lookup or treatment conclusion.
Understand why the result depends on exact age and the sex-specific reference without entering identifying dates or a child name.
Use a de-identified home-measurement source and copy only the reviewed whole-month age and same-session values.
Sees transparent arithmetic, source boundaries and a prompt for qualified longitudinal review rather than diet or diagnosis advice.
Verify LMS behavior below P95 and the CDC sigma method above P95 against official worked parameters.
Run male and female single-month examples on both sides of P95 and inspect the source row and steps.
Can trace official P95 and extended-percentile results and confirm the old annual-median ratio, sliders and proportional chart are absent.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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CDC uses the same metric BMI equation for children and adults, but accurate same-session standing height and weight are essential. This tool copies the values from one named record and cannot validate technique or calibration.
BMI = weight (kg) ÷ height (m)²The bundled CDC 2022 Extended BMI-for-Age data retains full source precision for L, M, S, sigma and P95. A 120-month record uses the 120.5-month CDC row representing that month.
Row = CDC chart sex + (completed years × 12 + additional months)CDC specifies a different extended method above P95. The result also reports percent of P95 and the screening range, while clinical interpretation remains with a qualified pediatric professional.
BMI ≤ P95: CDC LMS; BMI > P95: 90 + 10 × Φ((BMI − P95) ÷ sigma)Updated: August 2026
A de-identified 10-year-0-month male-reference exercise with 35 kg and 140 cm produces BMI 17.86 and uses the exact 120.5-month CDC row—not a rounded annual median.
A reviewed 9-year-6-month record selects the 114.5-month female CDC row. Changing the month or rounding measurements may change the percentile, so preserve the source values.
When BMI exceeds the source P95 value, the calculator uses CDC's extended sigma equation and reports percent of P95. The output is still screening information, not a diagnosis or treatment direction.
Reproduce one reviewed pediatric BMI-for-age screening record without the old annual-median approximation. Name a de-identified source, copy the responsible CDC chart-sex selection, completed years plus months, and same-session metric measurements. The tool uses the official CDC LMS method through P95 and extended sigma method above P95; it does not verify identity or measurements, diagnose a condition, or recommend treatment.