Home Back

NHS Blood Pressure Calculator

Blood Pressure Categories:

Normal: <135/85 (home), <140/90 (clinic)

mmHg
mmHg

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is the NHS Blood Pressure Calculator?

Definition: This calculator determines your blood pressure category based on NHS guidelines using your systolic and diastolic measurements.

Purpose: It helps individuals understand if their blood pressure falls within normal ranges or requires medical attention.

2. How Does the Calculator Work?

The calculator uses NHS blood pressure thresholds:

Home measurements: Normal <135/85 mmHg

Clinic measurements: Normal <140/90 mmHg

Explanation: Different thresholds are used because blood pressure tends to be lower when measured at home (white coat effect).

3. Importance of Blood Pressure Monitoring

Details: Regular monitoring helps detect hypertension early, reducing risks of heart disease, stroke, and kidney problems.

4. Using the Calculator

Tips: Enter your systolic (top number) and diastolic (bottom number) blood pressure readings, and specify where the measurement was taken.

5. Frequently Asked Questions (FAQ)

Q1: Why are home and clinic thresholds different?
A: Clinic measurements tend to be higher due to "white coat syndrome," so home measurements use slightly lower thresholds.

Q2: What should I do if my reading is high?
A: Consult your GP, especially if you get high readings on multiple occasions.

Q3: When is the best time to measure BP?
A: Take measurements at consistent times, ideally in the morning before medication and in the evening.

Q4: How many readings should I take?
A: NHS recommends taking two readings 1-2 minutes apart and using the average.

Q5: What affects blood pressure readings?
A: Stress, caffeine, exercise, smoking, and full bladder can temporarily raise BP.

NHS Blood Pressure Calculator© - All Rights Reserved 2025