One reading to a line
Write the date, the time of day, the reading and the pulse: 08/27/2026 morning 128/82 68. The order is flexible, because the parser looks for a date shape and for a systolic/diastolic pair rather than for fixed columns. Dates work as MM/DD/YYYY or as YYYY-MM-DD. The pulse can be left off. The words morning, waking, evening, bedtime and night are what split the two averages; a line with none of them is counted in the overall average and shown as unlabelled. Pasting them out of order is fine, since everything is sorted by date before anything is counted. Lines where the numbers cannot be a human blood pressure — a systolic under 60 or over 300, or a diastolic larger than the systolic — are set aside as typos and listed under the results.
Why morning and evening are kept apart
Blood pressure moves through the day in most people, and for many it runs highest in the hour or two after waking. That is why home-monitoring instructions ask for a morning set and an evening set rather than one reading whenever it occurs to you. A pattern that is high first thing and settles later is a different picture from one that is high all day, and a single combined average hides the difference completely. The technique matters as much as the timing: back supported, feet on the floor, arm resting at heart height, five minutes sitting quietly first, two readings a minute apart, and a cuff that actually fits the arm. A cuff that is too small reads high. None of that is fussiness — it is most of the difference between numbers that mean something and numbers that do not.
The comparison line and the chart are two separate things
Two different comparisons appear in the results and they are not the same instrument. The first is a single line you choose, used to count how many readings landed at or above it. The 135/85 and 140/90 options are the lines most commonly quoted for home and office readings respectively, and the third option counts against whatever personal target you typed in. The second is the row chart, which shows where each individual reading sits on the bands printed in the leaflets given out in waiting rooms. Those bands are drawn differently by different guidelines and different countries, and differently again for someone who is pregnant, or who has diabetes or kidney disease. Landing in a row is not a diagnosis and this page never says that you have anything. All it reports is which row a number falls into and how often.
What to hand over
The print button opens a Letter-sized sheet in a new window with the summary at the top and every reading listed below, then brings up the print dialog; the same window will save to PDF. There is an empty notes column on the right of the list, which is where the things a number cannot carry belong — the day a tablet changed, the night nobody slept, the week of a chest infection. If an appointment is short, the summary table alone gets the conversation moving faster than reading the list aloud. And if something in these numbers worries you before the appointment comes round, the sheet is not the right response to that; a phone call is.
Questions people ask
Does this tell me whether I have high blood pressure?
No, and it is not built to. It averages what you typed and shows where those numbers fall on a commonly printed chart. A diagnosis rests on how and when the readings were taken, on repeated measurement, and on the rest of your history and test results, and it is made by a clinician who has all of that in front of them.
My readings jump around a lot between measurements.
That is ordinary. Posture, talking, a recent coffee, a full bladder and the height of the arm can each move a reading by ten points or more. It is the reason averages over several days are asked for rather than single numbers. Sitting quietly for five minutes, keeping the arm at heart height and taking two readings a minute apart will tighten the spread. If it stays wide, that fact is itself worth mentioning at the appointment.
Is anything saved?
Nothing. The averages and the printable sheet are both built inside your browser, nothing is transmitted, and a refresh empties the box. To carry a log forward, copy the text output into a note or a file and paste it back in next time — it reads straight back in the same format.