Skip to content
ENExplore Calculators

Blood Pressure Percentile For Children Calculator

Work out blood pressure percentile for children instantly with clear inputs, formula shown and shareable results.

About Blood Pressure Percentile For Children Calculator

Converts a child's systolic reading into a percentile against the age, sex and height reference mean and standard deviation you supply from the AAP tables.

Formula

Percentile from z-score

z = (SBP - reference mean) / reference SD; percentile = 100 x Phi(z)

Worked example

With the default values below, Blood Pressure Percentile For Children Calculator returns Systolic percentile of 68.1%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Child systolic pressureaccepts 50–200 mmHg
108 mmHg
Reference mean systolic for age, sex and heightaccepts 50–180 mmHg
104 mmHg
Reference standard deviationaccepts 1–30 mmHg
8.5 mmHg

Results

Systolic percentile
68.1%
Z-score
0.47
AAP screening band
Below 90th centile — normal range

Step by step

  1. 1Values used
  2. 2Percentile from z-score
  3. 3Systolic percentile= 68.1
  4. 4Z-score= 0.47
  5. 5AAP screening band= Below 90th centile — normal range

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Where do the reference values come from?

The AAP 2017 Clinical Practice Guideline tables list mean and 95th-centile systolic values by age, sex and height percentile.

Why not enter age and height directly?

The reference tables are lookup data rather than a formula, so the reference mean and SD are entered explicitly and the percentile maths is shown.

Related Calculators

Blood Pressure Percentile For Children Calculator | Calcrivo