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Once you have your average blood pressure, the next step is to see where the numbers fall. Generally, anything under 120/80 is considered a good blood pressure. Average numbers between 120/80 and 139/89 are considered prehypertension.. If the average of your numbers is more than 140/90, you have high blood pressure.
Normal or optimal blood pressure is less than 120 over 80. And we call hypertension greater than 140 for the top number, greater than 90 for the bottom number. And now, if people have multiple risk factors for heart disease, many of us are trying to aim for at least blood pressure of less than 130 over 80. Next: My Blood Pressure Is Highly Variable.