Blood Pressure Calculator — BP Category
Free blood pressure calculator (AHA 2017). Enter systolic/diastolic BP, age and sex for category, percentile and pediatric ranges.
CalcVita. (2026). Blood Pressure Calculator — BP Category. CalcVita. Retrieved June 4, 2026, from https://calcvita.com/en/calculators/blood-pressure
How It Works
Enter your systolic pressure (top number), diastolic pressure (bottom number), age and sex. The calculator uses AHA 2017 guidelines for adults (≥18) and AAP 2017 simplified tables for children (1–17). Results include classification, estimated population percentile, mean arterial pressure, and pulse pressure.
Methodology & Classification
This calculator classifies blood pressure using the 2017 ACC/AHA High Blood Pressure Clinical Practice Guideline (Whelton PB et al., Hypertension 2018), which lowered the hypertension threshold from 140/90 to 130/80 mmHg. The thresholds are: Normal (<120 AND <80 mmHg), Elevated (120-129 AND <80), Stage 1 Hypertension (130-139 OR 80-89), Stage 2 Hypertension (>=140 OR >=90), and Hypertensive Crisis (>180 AND/OR >120). The European ESC/ESH 2023 Guidelines for the Management of Arterial Hypertension (Mancia G et al., J Hypertens 2023) use a similar framework with Grade 1 (140-159/90-99) and Grade 2 (>=160/>=100) categories. Mean Arterial Pressure (MAP) is calculated as: MAP = Diastolic + (Systolic - Diastolic) / 3.
AHA 2017 Adult Classification
Normal: <120/<80 mmHg | Elevated: 120–129/<80 | Stage 1: 130–139 or 80–89 | Stage 2: ≥140 or ≥90 | Crisis: >180 or >120. Diagnosis of hypertension requires readings confirmed on at least 2 separate occasions.
AAP 2017 Pediatric Classification
Normal: <90th percentile | Elevated: 90th–94th | Stage 1: ≥95th | Stage 2: ≥99th+5 or ≥140/90. Thresholds vary by age, sex, and height. This calculator uses simplified tables averaged across height percentiles.
Measure blood pressure after sitting quietly for 5 minutes with your back supported and feet flat on the floor.
Avoid caffeine, exercise, and smoking for at least 30 minutes before measuring blood pressure.
Take multiple readings (at least 2) on separate occasions to confirm a diagnosis.
Scientific Sources
- Whelton PK et al. 2017 ACC/AHA High Blood Pressure Clinical Practice Guideline. Hypertension. 2018;71(6):e13-e115. PMID 29133356
- Flynn JT et al. Clinical Practice Guideline for Screening and Management of High Blood Pressure in Children and Adolescents. Pediatrics. 2017;140(3):e20171904. PMID 29061186
- NCD Risk Factor Collaboration (NCD-RisC). Worldwide trends in hypertension prevalence and progress in treatment and control. Lancet. 2021;398(10304):957-980. PMID 33894083
- Mancia G et al. 2023 ESH Guidelines for the management of arterial hypertension. J Hypertens. 2023;41(12):1874-2071. PMID 37632753
Suggested article
Blood Pressure Guide: AHA 2017 Classification and Healthy Ranges
What does your blood pressure reading mean? Learn the AHA 2017 classification (Normal, Elevated, Stage 1 & 2 Hypertension, Hypertensive Crisis), how to measure correctly, and evidence-based lifestyle strategies to manage it.
Read the full article →More calculators
Keep exploring helpful tools
Cholesterol ratio
TC/HDL, LDL/HDL and non-HDL ratios with AHA/ACC 2018 classification.
eGFR — Kidney function
Glomerular filtration rate and CKD stage with CKD-EPI 2021 (KDIGO 2024).
A1C to blood sugar (eAG)
Convert A1C to estimated average glucose using the ADAG formula (ADA 2024).
BMI calculator
Compute your BMI with WHO ranges and guidance.