High Blood Pressure Support
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Age and BP calculations

I've been browsing around looking at 'normal' BP rates and see there are a lot of differences of opinion as to what is or isn't a healthy reading.

The NHS seem to stick rigidly to 120/80 whatever your age, where other sites bring age into their calculation. If I follow the NHS criteria I have high BP, but the other calculations make me more or less normal if I keep below 140/90.

How is the age and sex of a person's BP calculated - is there a formula?

7 Replies

Hi. I don't know the calculation sorry. However my GP specialises in bp and is happy for mine to be 140/80. I'm 61. When medication took mine down to 120 I felt faint and dizzy.


I'm 77 and 5 weeks ago I stopped taking my meds without GP supervision as I knew she'd go ballistic if I told her. I was feeling generally 'tired all the time' and really 'down' and getting no enjoyment out of life, nothing seemed worth the effort.

I take my BP every morning around 9.30, then average it out over the week, it has had hardly any difference on my readings - the 1st week's average was 161/75 and last week's 133/81.

I just feel better in myself now and seem to have more stamina too.

I'm not urging everyone to try this because its a really stupid thing to do, but the pills didn't seem to be helping and I'm much happier with 133/81 - I am 77 and content.

But it would be good to know how these calculations regarding age and bp are formulated, and how much they really matter.


I don't know of any formula but I met an Italian friend many years ago who told me that his BP was 140/90 with taking medicine for it (albeit low doses) but that his doctor was happy with that result. I was told to check my BP three times and calculate an average reading. I had serious problems with my liver when I took Enalapril (I was taking another medicine as well) so I decided to just continue checking it. Your reading seems quite OK, especially as you're feeling better in yourself too.


Great news! that you are good without meds..sounds like the meds were increasing your pressure. What were your readings prior to getting put on meds?


exDancer...I am a 66 yr. old female..my Dr. wants me at 140/80. I run 150's over mid 80's. First he said the bottom number is what he worries about then down the road he said top and both numbers,,,so confused, I am a very nervouse, sensative person and have a lot o stress in my life..I take on other peoples problems and feel their pain. I have to try to get "numb" to stressful situations. I know my pb is because of my personality. Hence the word "Hyper" in Hypertension. I am also med sensitive and have tried many, so far I can only tolerate the channel blockers. They do relax me and keep my bottom number low but sometimes the top number goes up into the 160's. I am currently on Verapamil 120mg. 1x day.

I will watch he numbers and if they go higher for a long period of time I will go to 180mg.


Do you take your own blood pressure at all? It wasn't until I got my own little moniter (a wrist one because the arm ones hurt) that I realised how up and down the readings are during the day (for no apparent reason). I am frequently at 180/80 and then down to 119/79 a couple of house later.

Early in the morning it seems to be high, also after eating, but on returning home exhausted after an hour's swimming I was back in the 120s again.

As to the systolic and diastolic numbers - I've been given so many different explanations I too am confused. I know the high one is the pressure of blood pumped by the heart and the low one is when its resting - which is understandable - but otherwise ..... is it good to be low at the bottom as well as the top?


I have a wrist monitor and take my own readings. I too find my reading high in the mornings 156/82 sometimes higher but in the afternoon the number go down to 140/80 then raise up at night.

maybe because I take Verapamil in the morning and it takes a while to kick in ?


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