What is a normal blood pressure by age?

Current American Heart Association guidance uses one target for all adults: below 120 over 80. Older adults often have higher systolic readings, but that is a risk factor to treat rather than a normal level to accept.

Which number matters more, the top or the bottom?

Both matter, and either can place you in a higher category. After about age 50 the systolic number is the stronger predictor of cardiovascular risk.

Why is my blood pressure higher in the morning?

Blood pressure follows a daily rhythm and surges in the hours around waking. That is normal, which is why morning readings should be compared with other morning readings, not with evening ones.

Can anxiety cause a high blood pressure reading?

Yes. Stress, pain, and anxiety temporarily raise blood pressure, and white coat hypertension affects roughly one in five people. Home readings taken over a week give a more reliable picture.

How often should I check my blood pressure at home?

If you are being treated or monitored, twice daily for the week before an appointment is usually enough. Otherwise a few readings a month is plenty unless your clinician asks for more.

Blood Pressure Category Checker

Enter your blood pressure reading to see which category it falls into based on AHA guidelines (educational only).

Systolic (top number) mmHg

Diastolic (bottom number) mmHg

Enter your reading to see the category.

Blood Pressure Categories (AHA)

Normal< 120 / < 80 mmHg

Elevated120–129 / < 80 mmHg

High BP Stage 1130–139 / 80–89 mmHg

High BP Stage 2≥ 140 / ≥ 90 mmHg

Crisis≥ 180 / ≥ 120 mmHg

How to Take a Reading That Is Worth Trusting

Most surprising blood pressure readings come from technique, not from a change in health. Sit quietly for five minutes first, with your back supported, both feet flat on the floor, and your legs uncrossed. Rest your arm on a table so the cuff sits level with your heart. Do not talk during the measurement, and avoid caffeine, exercise, and smoking for at least half an hour before.

Take two readings a minute apart and record both. If they differ by more than 5 mmHg, take a third and average the last two. A cuff that is too small inflates the number, sometimes by 10 to 40 mmHg, so check that the bladder wraps at least 80 percent of your upper arm.

Understanding Systolic and Diastolic

The top number, systolic, is the pressure while the heart contracts. The bottom number, diastolic, is the pressure between beats. Either number on its own can place you in a higher category, so a reading of 145 over 78 is stage 2 hypertension even though the bottom number looks fine.

After about age 60, arteries stiffen and systolic pressure tends to climb while diastolic flattens or falls. That widening gap, called pulse pressure, is common and is one reason clinicians pay more attention to the top number in older adults.

One Reading Is Not a Diagnosis

Blood pressure moves throughout the day. It is lowest during sleep, rises sharply on waking, and responds to pain, stress, a full bladder, and the sight of a clinician. Roughly one in five people has white coat hypertension, where readings are high in a medical office and normal at home.

A diagnosis usually requires several elevated readings over days or weeks, ideally from home monitoring. Log morning and evening readings for a week before your appointment. Write down the date, time, both numbers, and the arm used, then bring the log with you.

Measure at the same two times each day, before medication and before breakfast in the morning.
Use the same arm every time, and note which arm it is.
Record every reading, including the ones that look wrong.
Replace or recalibrate a home monitor every two years.

When to Seek Care Immediately

A reading at or above 180 systolic or 120 diastolic is a hypertensive crisis. Rest for five minutes and repeat. If it stays that high, contact a clinician the same day. Call emergency services immediately if the high reading comes with chest pain, shortness of breath, weakness or numbness on one side, slurred speech, vision changes, or a severe headache. Those signal possible organ damage in progress.