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About this tool
Track and monitor your blood pressure readings with charts and history.
The Blood Pressure Checker logs systolic and diastolic readings, labels each one against the ACC/AHA categories — Normal, Elevated, Stage 1 and Stage 2 hypertension — and plots both numbers as a trend line so you can see the pattern rather than a single measurement. Every reading is timestamped as you add it and the two series are charted together in mmHg. It is for people who take readings at home and want the numbers organised before a doctor's appointment, not a diagnosis.
Open Blood Pressure Checker on AltFTool — it loads instantly in your browser.
In the New Reading panel type your figure into Systolic (mmHg) and then Diastolic (mmHg) — leaving either box empty stops the entry with 'Please enter both readings'.
Press Add Measurement. The reading is stamped with the current time and joins Readings History, and the Latest Status card names its band — Normal, Elevated, Stage 1 Hypertension or Stage 2 Hypertension — above the figure in mmHg.
Read the Measurement Trends chart, which plots Systolic (mmHg) and Diastolic (mmHg) as two lines across your logged times, and use Clear in the Readings History header to empty the list back to 'No readings recorded yet.'
The label uses the standard thresholds rather than leaving you to look up whether 132 over 84 counts as elevated or Stage 1.
Both lines share one time axis, which makes it obvious when only one of the two numbers is moving — something a list of pairs hides.
Readings stay in the browser session, so there is no account, no upload and no health record held anywhere.
Under 120 systolic and under 80 diastolic, by the ACC/AHA categories this tool uses. Elevated is 120-129 systolic with diastolic still under 80; Stage 1 hypertension is 130-139 or 80-89; Stage 2 is 140 or higher, or 90 or higher.
Sit quietly with your back supported and feet flat for 5 minutes first, and avoid caffeine, smoking or exercise for at least 30 minutes beforehand. Keep the cuff at heart level and do not talk during the measurement — talking alone can add several mmHg.
No. Readings live in the page session only, so refreshing or closing the tab clears them. Note the numbers down or take a screenshot of the chart if you need to keep a record between sessions.
A single high reading is not a diagnosis; blood pressure varies through the day and with stress, so clinicians look at an average across several readings on different days. Seek urgent medical care if a reading is 180/120 or above, or if you have chest pain, breathlessness or vision changes — and discuss any persistent elevation with your doctor.