What is a normal blood pressure?

Under 120/80 mmHg is considered normal by the American Heart Association.

Which number matters more?

Both. Doctors look at either one being high.

How should I measure at home?

Sit quietly for five minutes, feet flat, arm supported at heart level, and take two readings a minute apart.

All tools

Blood Pressure Checker

Enter the top (systolic) and bottom (diastolic) numbers from your reading to see what category they fall in.

Your Reading (mmHg)

Systolic (top)

Diastolic (bottom)

Check your blood pressure reading against standard health categories — for monitoring cardiovascular health.

Formula

Blood pressure = systolic/diastolic (mmHg). Systolic = pressure during heartbeats, diastolic = between beats.

Reference Values

•Normal: < 120/80 mmHg
•Elevated: 120-129/< 80 mmHg
•High (Stage 1): 130-139/80-89 mmHg

FAQ

Common questions about Blood Pressure Checker

How we calculate this

We use the standard published formula for this calculation, and we show the working so you can check it.

Spotted a mistake? Tell us and we'll check it within a few days. See how we check our calculators.

Medical disclaimer

This tool gives a general estimate for information only. It is not medical advice and cannot diagnose a condition. Talk to a doctor, midwife or other qualified professional about your own situation.