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About this tool
Log blood pressure readings, see each one categorised by the AHA scale, and print a clean trend summary for your doctor.
The Blood Pressure Log records each cuff reading with its date, time, pulse, arm and posture, labels it against the 2017 AHA/ACC categories, and averages your readings over the last 7 and 30 days plus a separate morning and evening average. It is meant for anyone whose doctor asked them to monitor at home for a couple of weeks: instead of a paper slip of loose numbers you get a trend chart, a category breakdown, and a printable sheet. Readings live in your browser only, and the log records rather than diagnoses — hypertension is a diagnosis a clinician makes.
Open Blood Pressure Log & Tracker on AltFTool — it loads instantly in your browser.
In the Add a reading panel enter Systolic (top) and Diastolic (bottom), optionally a Pulse, and set Date and time, Arm and Position — the This reading is box names the AHA/ACC category as you type, so Normal, Elevated, Stage 1, Stage 2 or Hypertensive crisis shows before you commit.
Press Add reading to save it. The entry joins Your readings newest first, feeds the Trends chart and updates the Last 7 days, Last 30 days, Morning and Evening averages; the pencil icon on any row reloads it as Edit reading, where Update reading saves the change.
Use Copy for doctor to put the whole log, averages and category spread on the clipboard as text, or Print for the clinic sheet — fill in Name for the printout first if you want your name on it. Clear all asks Delete all N? before wiping the browser copy, and Keep backs out.
Computes 7-day, 30-day, morning and evening averages, which is what treatment decisions are actually based on.
Groups readings before noon separately from those after, so a morning-heavy pattern shows up instead of being averaged away.
One click produces a plain sheet with your name, the averages table, the category spread and every reading — designed to be handed over, not scrolled.
Under the 2017 AHA/ACC categories used here, 130-139 systolic or 80-89 diastolic is Stage 1 hypertension, and 140 or higher or 90 or higher is Stage 2. Normal is below 120 and below 80, with 120-129 over a diastolic under 80 counted as Elevated. Home averages are usually judged slightly lower than clinic readings, so bring the log to your doctor rather than self-diagnosing from it.
The worse of the two numbers decides, because the guideline joins the thresholds with 'or'. A reading of 135/75 is Stage 1 on the systolic alone, and 118/92 is Stage 2 on the diastolic alone — the log applies exactly that rule.
180 systolic or higher, and/or 120 diastolic or higher, is the hypertensive crisis range. Sit quietly for five minutes and repeat the measurement; if it stays that high, get medical help immediately, and do not wait to re-measure at all if you also have chest pain, breathlessness, weakness, trouble speaking or vision changes.
Sit still for five minutes with your back supported, feet flat and the cuff on bare skin at heart level, then take two readings a minute apart and log the average. Technique errors move a reading by 10-20 mmHg — crossed legs alone can add about 8 mmHg and a full bladder roughly 10 — which is more than many medications shift it.