What does a blood pressure of 148/98 mean?

A blood pressure of 148/98 mmHg is stage 2 hypertension under American Heart Association (AHA) guidance, because the systolic 148 and the diastolic 98 both sit in that higher band. One reading is not a diagnosis, and the average over time matters more than any single number. A repeated 148/98 result is worth reviewing with a doctor.

This short guide explains what the two numbers mean, where 148/98 falls on the official categories, and what to do next.

What a 148/98 blood pressure reading means

Every reading has two numbers, measured in millimetres of mercury (mmHg). The top number is systolic pressure, the force as your heart beats. The bottom number is diastolic pressure, the force while your heart rests between beats. So 148/98 means a systolic of 148 and a diastolic of 98.

A reading is judged by whichever number falls in the higher category. At 148/98, both numbers are in the stage 2 range, so the whole reading counts as stage 2.

Where 148/98 sits on the AHA categories

The American Heart Association and the American College of Cardiology define adult categories like this:

• Normal: less than 120 systolic and less than 80 diastolic.
• Elevated: 120 to 129 systolic and less than 80 diastolic.
• Hypertension stage 1: 130 to 139 systolic or 80 to 89 diastolic.
• Hypertension stage 2: 140 or higher systolic or 90 or higher diastolic.

At 148/98 both numbers are above the stage 2 threshold, so under US guidance this is stage 2 hypertension. UK guidance agrees it is high: the NHS treats a clinic reading of 140/90 mmHg or higher, or a home average of 135/85 or higher, as high blood pressure. For the full map, see our guide to understanding your blood pressure readings and the stages of hypertension explained.

What to do about a 148/98 reading

First, confirm the number is accurate. The AHA advises resting quietly for five minutes, sitting with your back supported and feet flat, keeping the cuff at heart level, then taking two or three readings a minute apart and averaging them. Coffee, a recent cigarette, exercise, or stress can all push a reading up. Our guide to measuring blood pressure at home walks through it.

If 148/98 is genuinely your average, treat it as a reason to see a doctor rather than something to handle alone. The AHA notes that stage 2 hypertension is usually managed with lifestyle changes and, for many people, medication. Supportive habits still matter: less salt, more movement, less alcohol, a healthy weight, and good sleep all help over time, as covered in how to lower your blood pressure naturally. You can compare a nearby reading in what a 150/90 reading means.

When to see a doctor

A single 148/98 reading is not an emergency, but a stage 2 average should be reviewed by a clinician who can confirm the pattern and discuss treatment. Make an appointment if your home readings stay at or above this level.

Seek urgent help right away if you ever record a reading higher than 180 systolic and, or, higher than 120 diastolic. The AHA advises waiting five minutes and measuring again, and if it stays that high, contacting your doctor without delay. If a very high reading comes with chest pain, shortness of breath, numbness or weakness, vision changes, or difficulty speaking, call emergency services immediately. When in doubt about any reading or symptom, speak with a healthcare professional. This guide is general information and does not replace personalised medical advice.

Log this reading in CardioVibe

One number rarely tells the whole story; the real value is watching the pattern. You can log this reading free in CardioVibe, keeping your numbers ready to share with your doctor. It supports your care rather than replacing it.

Frequently asked questions

Is 148/98 high blood pressure?

Yes. Under US guidance 148/98 is stage 2 hypertension, and under NHS guidance it is high blood pressure, since both numbers are above the 140/90 line. The category reflects a consistent average, not one reading.

Is 148 over 98 dangerous?

It is not an immediate emergency by itself, but it is high enough to need medical review. A hypertensive crisis, which needs urgent care, is a reading higher than 180 systolic and, or, 120 diastolic, especially with symptoms.

What should I do if my blood pressure is 148/98?

Recheck with good technique and average two or three readings. If 148/98 is typical for you, book an appointment with your doctor and begin supportive habits such as cutting salt and moving more.

Does 148/98 always need medication?

Not always, but stage 2 hypertension often does, alongside lifestyle changes. Your doctor can decide what is right based on your numbers, your symptoms, and your overall risk.