Normal blood pressure by age, and why the ranges have no age bands
There is no age row to look up: adults are read against one set of ranges. Where age does change the numbers, why age charts exist anyway, and what to use instead.
Updated 3 min read
There is no age row to look up. ESC 2024 gives adults one set of ranges. Its home hypertension thresholds, systolic 135 or diastolic 85 mmHg, mean 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
For an office reading, ESC 2024 calls blood pressure non-elevated only when systolic is below 120 and diastolic is below 70 mmHg. It is elevated when systolic is 120 to 139 or diastolic is 70 to 89. Hypertension starts when systolic reaches 140 or diastolic reaches 90. For a home average, the hypertension thresholds are lower: systolic 135 or diastolic 85. The adult table 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. In the UK, NICE NG136 sets a clinic target below 140/90 for adults under 80, and below 150/90 from 80. For home or daytime ambulatory 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 need pediatric ranges
For children from age 1 to under 13, the American Academy of Pediatrics guideline uses percentiles based on age, height and sex. From age 13, it uses fixed adolescent thresholds.
Both require pediatric context and clinical assessment. Do not use this adult calculator to interpret a child’s reading.
What to use instead of an age chart
Use a structured series rather than an age row. In the UK pathway, NICE confirms hypertension when the clinic systolic reaches 140 or the diastolic reaches 90, and the home-average systolic reaches 135 or the diastolic reaches 85.
Follow the schedule your clinician gives you. The UK NICE routine uses morning and evening pairs for at least four and ideally seven days, discards day one, and averages the remaining measurements. 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 your readings together so you can follow changes over time. Choose a period to see averages or share a report with your doctor.