How to measure blood pressure at home
Correct technique affects the result more than the device's accuracy. 6 steps for an at-home reading.
Measuring blood pressure at home helps your physician assess your cardiac state more accurately than a single visit. Pre-visit anxiety ("white coat hypertension") can raise readings by 10–20 mmHg.
6 steps for an accurate reading
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1
Sit comfortably
Settle for 5 minutes before measuring with your back supported.
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2
Feet flat
Do not cross legs; both feet on the floor.
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3
Left arm on a table
Supported at heart level, palm up.
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4
Stay still
Do not change position during the reading. No smoking or coffee 30 minutes before.
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5
Cuff on upper arm
Snug but not tight — level with the heart.
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6
Two readings back-to-back
1-minute pause between them. Take the average.
When to call your doctor
If systolic (upper) >180 or diastolic (lower) >110 — contact your doctor the same day. Acute headache, vision changes or chest pain — call 113.
Normal values
| Classification | Blood pressure (mmHg) |
|---|---|
| Optimal | <120 / <80 |
| Normal | 120–129 / 80–84 |
| High-normal | 130–139 / 85–89 |
| Grade 1 hypertension | 140–159 / 90–99 |
| Grade 2 hypertension | ≥160 / ≥100 |
Please note
This guide is informational and does not replace a physician's advice. If concerns remain, contact your family doctor.