Pediatric Blood Pressure Classification
Enter age and blood pressure to determine the AAP 2017 category (Normal, Elevated, Stage 1 or Stage 2 hypertension). Percentiles are approximated for rapid assessment.
Results
Classification
Elevated
≥90th percentile but <95th percentile.
Approximate percentiles
Approximate 90th percentile ~102/62 mmHg; 95th percentile ~107/66 mmHg
Quick reference using 90th/95th percentile approximations.
How to Use This Calculator
Measure BP correctly
Child seated, back supported, feet flat, appropriate cuff size, arm at heart level.
Enter the child’s age
Use exact age to improve percentile estimation (months for infants).
Interpret with clinical context
Confirm elevated readings on 3 separate visits before diagnosing hypertension.
Formula
90th percentile systolic ≈ 90 + (age in years × 2).
These formulas provide rapid estimates; precise percentiles require sex- and height-specific AAP tables (2017 Guideline).
Frequently Asked Questions
How accurate are these thresholds?
They are quick approximations. For precise management, use complete percentile tables or validated calculators.
When should I refer to nephrology?
Refer for persistent Stage 2, symptomatic hypertension, suspected secondary causes, or abnormal labs.
Does height percentile matter?
Yes—taller children have higher normal thresholds. This tool assumes average height (50th percentile).
Do cuff size and technique change results?
Absolutely. Incorrect cuff size is a common cause of false hypertension in pediatrics.
Should I repeat an elevated reading?
Yes—repeat manually after 5 minutes of rest before classifying.