CalKit

Blood Pressure Calculator

Classify blood pressure readings.

mmHg
mmHg
혈압 분류
고혈압 전단계
고혈압 전단계

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측정 결과

수축기 혈압120 mmHg
이완기 혈압80 mmHg
맥압40 mmHg
평균 동맥압93 mmHg
분류고혈압 전단계

혈압 분류 기준

정상120/80 mmHg 미만
주의120~129 / 80 미만 mmHg
고혈압 전단계130~139 / 80~89 mmHg
고혈압 1단계140~159 / 90~99 mmHg
고혈압 2단계160 이상 / 100 이상 mmHg

Overview

The Blood Pressure Calculator classifies your blood pressure readings according to AHA (American Heart Association) 2017 guidelines. Normal blood pressure is below 120/80 mmHg, and hypertension is diagnosed at 140/90 mmHg or above.

Formula

Classification (AHA 2017): Normal — SBP < 120 AND DBP < 80 | Elevated — SBP 120-129 AND DBP < 80 | Hypertension Stage 1 — SBP 130-139 OR DBP 80-89 | Hypertension Stage 2 — SBP ≥ 140 OR DBP ≥ 90 | Hypertensive Crisis — SBP > 180 AND/OR DBP > 120

How to Use

  1. 1Enter your systolic blood pressure (top number, mmHg).
  2. 2Enter your diastolic blood pressure (bottom number, mmHg).
  3. 3Click 'Calculate'.
  4. 4Review your blood pressure classification and recommended actions.

Tips

  • ✔Blood pressure fluctuates throughout the day — use an average of multiple readings taken at the same time on different days.
  • ✔Rest for 5 minutes before measuring. Sit with back supported, arm at heart level.
  • ✔Coffee, exercise, and smoking can temporarily elevate blood pressure for up to 30 minutes.
  • ✔This calculator is for reference only. Consult a doctor for diagnosis and treatment of blood pressure issues.

FAQ

Q. Did the hypertension threshold change to 130/80?

The 2017 AHA guidelines lowered Stage 1 hypertension to 130/80 mmHg. However, medication is typically recommended starting at 140/90 mmHg unless additional risk factors are present.

Q. What is considered low blood pressure?

Generally, systolic below 90 mmHg or diastolic below 60 mmHg is considered hypotension. Seek medical advice if you experience dizziness or fainting.

Q. Are home blood pressure monitors accurate?

Validated automatic monitors (upper-arm cuff recommended) provide reasonably accurate readings at home. Upper-arm monitors tend to be more accurate than wrist models.

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