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Nephrology · Paediatrics

AAP Pediatric Blood Pressure Stage calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

years

Allowed range: 1–17 years

Completed years, 1 through 17, as printed in Tables 4 and 5. From age 13 years the stage uses the Table 3 mm Hg cutoffs.

Sex
Height percentile

Choose one of the seven height percentiles printed in Tables 4 and 5. From age 13 years, Table 3 does not use height percentile.

mm Hg

Allowed range: 40–260 mm Hg

Quick picks

Enter systolic pressure in mm Hg from one reading. The guideline asks for repeated readings before a diagnosis.

mm Hg

Allowed range: 20–180 mm Hg

Quick picks

Enter diastolic pressure in mm Hg from the same reading.

Result

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Clinical inputs

  • Age (years)Accepted range: 1 to 17
  • Sex
  • Height percentile
  • Systolic blood pressure (mm Hg)Accepted range: 40 to 260
  • Diastolic blood pressure (mm Hg)Accepted range: 20 to 180

Primary source

Flynn JT et al. Clinical Practice Guideline for Screening and Management of High Blood Pressure in Children and Adolescents. Pediatrics. DOI: 10.1542/peds.2017-1904. PMID: 28827377. Table 3, children aged 1 to younger than 13 years: normal is below the 90th percentile; elevated is the 90th percentile up to the 95th percentile, or 120/80 mm Hg up to the 95th percentile, whichever is lower; stage 1 is the 95th percentile up to the 95th percentile + 12 mm Hg, or 130/80 to 139/89 mm Hg, whichever is lower; stage 2 is the 95th percentile + 12 mm Hg, or 140/90 mm Hg or higher, whichever is lower. The same table, age 13 years or older: normal is below 120/80 mm Hg; elevated is 120/<80 to 129/<80 mm Hg; stage 1 is 130/80 to 139/89 mm Hg; stage 2 is 140/90 mm Hg or higher. Tables 4 and 5 print systolic and diastolic mm Hg at the 90th, 95th, and 95th + 12 mm Hg for boys and girls by completed year of age and height percentiles 5, 10, 25, 50, 75, 90, and 95. For age 13 years or older the stage follows Table 3 and does not use those percentile cells. The higher of the systolic category and the diastolic category is the stage. Table 6 is a screening list and is not this stage. One reading is staged here; the guideline asks for repeated measurements before a diagnosis. (2017)

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