Normal Blood Pressure by Age: What’s Healthy at Every Stage

Blood pressure isn’t a single “one‑size‑fits‑all” number. What’s considered normal varies significantly depending on your age, sex, and even height. Knowing the typical range for your age group helps you and your doctor interpret your readings correctly — and spot potential problems early. In this article, reviewed by Dr. Ravi Sishir Reddy, we provide clear, age‑based blood pressure charts and explain what influences these changes throughout life.

1. Why Does Blood Pressure Change With Age?

As you grow from infancy to old age, your body undergoes profound changes that directly impact blood pressure:

• Arterial stiffness: With age, the elastic fibres in large arteries gradually degrade and are replaced by stiffer collagen. This reduces the arteries’ ability to expand with each heartbeat, causing systolic pressure to rise.
• Blood volume and heart size: Children have smaller hearts and less blood volume, so their normal pressures are much lower. As the heart grows and pumps more forcefully, pressure increases.
• Hormonal changes: Hormones that regulate blood pressure (like renin, aldosterone, and oestrogen) fluctuate with life stages — notably during puberty, pregnancy, and menopause.

Understanding these changes prevents unnecessary alarm when a reading is slightly outside the standard 120/80 benchmark for a specific age group.

2. Normal Blood Pressure for Adults (18+ Years)

For adults, major health organisations use a unified classification system rather than adjusting by exact age. However, average readings do creep up with each decade. The table below shows the current American Heart Association categories alongside typical averages for different adult age bands.

Category	Systolic (mmHg)	Diastolic (mmHg)
Normal	Below 120	and Below 80
Elevated	120 – 129	and Below 80
High BP Stage 1	130 – 139	or 80 – 89
High BP Stage 2	140 or higher	or 90 or higher
Hypertensive Crisis	Above 180	and/or Above 120

Typical average BP by adult age group (not diagnostic thresholds):

Age Group	Average Systolic	Average Diastolic
18–39	110 – 120	70 – 80
40–59	115 – 130	75 – 85
60+	120 – 140	70 – 80

Notice that in older adults, systolic pressure tends to rise while diastolic may stay the same or even drop slightly — a reflection of stiffening arteries.

3. Normal Blood Pressure in Children

Paediatric blood pressure is interpreted very differently from adults. A child’s BP depends on age, sex, and height percentile. A reading that would be low for an adult may be perfectly normal for a 7‑year‑old. High blood pressure in children is typically defined as a systolic or diastolic reading at or above the 95th percentile for their age, sex, and height.

Approximate normal ranges (50th percentile) for average‑height children:

Age	Boys (mmHg)	Girls (mmHg)
1–3 years	90 – 105 / 55 – 65	90 – 105 / 55 – 65
4–6 years	95 – 110 / 60 – 70	95 – 110 / 60 – 70
7–10 years	100 – 115 / 60 – 75	100 – 115 / 60 – 75
11–13 years	105 – 120 / 65 – 75	105 – 120 / 65 – 75
14–17 years	110 – 125 / 65 – 80	110 – 120 / 65 – 80

For a deeper dive, see our Blood Pressure in Children article.

4. Blood Pressure in the Elderly: What’s Acceptable?

In people aged 65 and older, treatment goals are sometimes relaxed slightly. While the ideal target remains below 130/80 mmHg, many older adults achieve 130–140 / 70–80 mmHg without symptoms. Aggressively lowering BP in very frail seniors can cause dizziness, falls, and kidney problems.

Dr. Reddy advises that for the elderly, the goal is to balance cardiovascular protection with quality of life. Regular monitoring and individualised targets set with a physician are essential.

👉 Read more: Blood Pressure in the Elderly →

5. Blood Pressure During Pregnancy

Pregnancy triggers significant cardiovascular changes. Blood pressure typically drops during the first and second trimesters because blood vessels dilate. By the third trimester, pressure returns to pre‑pregnancy levels or slightly higher.

A reading above 140/90 mmHg at any point during pregnancy requires careful monitoring, as it can be a sign of gestational hypertension or pre‑eclampsia — both of which pose risks to mother and baby.

👉 Read more: Blood Pressure During Pregnancy →

6. When Should You Be Concerned?

While age‑adjusted averages are helpful, the official diagnostic thresholds for hypertension are still the same for all adults: 130/80 mmHg or higher on repeated measurements. A single reading slightly above or below your age‑group average is not a reason to panic, but a persistent trend upward should be evaluated.

Use a printable BP log to track your readings over time and share them with your doctor.