Normal blood pressure by age, and why the ranges have no age bands
There is no age row to look up. ESC 2024 gives adults one set of ranges, and 135/85 at home means the same thing at 35 and at 75. Age changes two other things, what is common and what a doctor aims for during treatment, and neither of those is the definition of a normal reading.
The ranges an adult is read against
One line at 120/70 and one at 140/90 at the doctor’s office, or 135/85 at home. Below the first line ESC 2024 calls a reading non-elevated; between the lines it is elevated; at or above the second it is hypertension. That is the whole table, and it has no age column.
The American Heart Association’s categories are drawn a little differently, with normal below 120/80 and stages above, and they have no age column either. The blood pressure calculator on this site has no age field for the same reason.
Why age charts exist anyway
Because average blood pressure really does rise with age, and a chart of averages is easy to publish. The American Heart Association explains the mechanism: as people get older their systolic pressure usually goes up because “large arteries become stiffer” and plaque builds up over time.
That makes a higher reading common at 70. It does not make it healthy. An age chart tells you where you sit among people your age; the guideline tells you what the number means for your arteries. Only the second one is a range.
Where age really does change the numbers
In treatment, once someone has a diagnosis. NICE NG136 sets a clinic target below 140/90 for adults under 80, and below 150/90 from 80. For home and 24-hour averages the same split is below 135/85 under 80 and below 145/85 from 80, with clinical judgement for people with frailty or several conditions.
Those are goals a doctor sets and reviews. They are not the line that decides whether a reading counts as high, and they do not apply to someone without a diagnosis.
Children are the real exception
A child’s reading has no fixed number at all. MedlinePlus, the health site of the US National Library of Medicine, describes the method: “for children and teens, the health care provider compares the blood pressure reading to what is normal for other kids who are the same age, height, and sex.”
That is a genuine age comparison, done by a clinician with a percentile table. No adult chart substitutes for it.
What to use instead of an age chart
Your own week. NICE confirms hypertension when a clinic reading of 140/90 or higher meets a home average of 135/85 or higher, so the number that decides anything is an average of your readings, not a row matched to your birthday.
Measure morning and evening for a week, two readings a minute apart, and average days two to seven. The average blood pressure calculator does the arithmetic and names the range; the printable blood pressure log gives you the sheet to fill in; how to keep a blood pressure log explains how a doctor reads it.
BP Diary keeps every reading with its time, works out the weekly average, and prints the report your doctor asks for, so what you bring to the appointment is your own history rather than someone else’s chart.