Pediatric Blood Pressure Calculator Guide: Normal BP by Age in Children
Children's blood pressure norms change with age, sex, and height. Learn what is normal for your child and when readings warrant a doctor visit.
Why Children's BP Norms Differ
Adult blood pressure categories (normal, elevated, Stage 1 hypertension) cannot be directly applied to children under 13. A reading of 120/80 mmHg is normal for a 40-year-old but elevated for a 6-year-old.
The AAP 2017 guidelines define pediatric hypertension based on age, sex, and height percentile-specific normative data from thousands of healthy children.
Key Rule
For children under 13: BP categories are based on percentiles. For ages 13+: adult thresholds apply (normal <120/80, elevated ≥120/80, Stage 1 ≥130/80).
Pediatric BP Categories (Under 13)
The AAP classifies pediatric blood pressure into four categories based on percentile thresholds relative to age, sex, and height:
| Category | Definition |
|---|---|
| Normal | Both systolic and diastolic below 90th percentile for age/sex/height |
| Elevated BP | ≥90th but <95th percentile, OR ≥120/80 mmHg |
| Stage 1 Hypertension | ≥95th percentile to <95th + 12 mmHg, OR 130–139/80–89 mmHg |
| Stage 2 Hypertension | ≥95th percentile + 12 mmHg, OR ≥140/90 mmHg |
Use our pediatric blood pressure calculator to enter your child's age, sex, and height to get precise percentile-based BP categories.
Approximate Normal BP by Age
These ranges represent typical normal values. Exact percentile thresholds vary by sex and height — always use a calculator or your pediatrician for precise assessment:
| Age | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| 1 year | 80–100 | 55–65 |
| 3 years | 86–106 | 60–72 |
| 6 years | 90–110 | 60–74 |
| 9 years | 95–113 | 60–76 |
| 12 years | 100–120 | 62–80 |
| 15 years | 105–125 | 64–83 |
| Adults (18+) | Less than 120 | Less than 80 |
These are approximate ranges. Exact percentiles depend on sex and height — use our calculator for precise values.
When to Monitor Closely
Certain children face higher risk for hypertension and should have blood pressure checked at every well-child visit:
FAQ
What is normal blood pressure for a child?
At what age do adult blood pressure standards apply?
What causes high blood pressure in children?
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Author Spotlight
The ToolsACE Team
ToolsACE is an independent platform founded in 2023 by a team of software developers and educators. We build free, privacy-first tools and write guides to help people make better decisions — without sign-ups, paywalls, or data tracking.
