How to measure your blood pressure correctly at home

The World Health Organization estimates that about 1.4 billion adults aged 30–79 had high blood pressure in 2024, and around 44% of them did not know it. Because it usually causes no symptoms, measuring is the only way to find out.

When is blood pressure high?

• Measured by a healthcare professional: 140/90 mmHg or higher.
• Measured at home: 135/85 mmHg or higher.

The first number is the systolic pressure (when the heart pumps); the second is the diastolic pressure (between beats). Hypertension is diagnosed from high readings on at least two different days, not from a single reading.

How to measure correctly

1. Sit down and rest for a few minutes first.
2. Roll up your sleeve or remove long sleeves.
3. Rest your outstretched arm on a table and relax.
4. Take a reading and note it, wait 1 minute, then measure again.
5. You usually measure twice a day, morning and evening, for as many days as your doctor advises.
6. Follow your monitor’s instructions, as machines differ.

Keeping your blood pressure healthy

• Keep salt under 2 grams a day.
• Eat more vegetables and fruit.
• Do at least 150 minutes of moderate activity a week, or 75 minutes of vigorous activity, plus strength exercises on 2 or more days.
• Keep a healthy weight and avoid tobacco.
• Take prescribed medicines regularly and never stop them without your doctor’s advice.

If your home readings are repeatedly 135/85 or higher, book an appointment and bring your log.

Note: This content is for general awareness and does not replace a consultation with a doctor. In an emergency, please call 997.

Sources

• World Health Organization – Hypertension
• NHS – Blood pressure test