Blood Pressure Log: How to Keep One (Template Included)
Last updated: July 2026
A single blood pressure reading tells a doctor almost nothing; a week of structured readings tells them nearly everything they need to decide on diagnosis or treatment. That's what a blood pressure log is for — and doctors consistently say a patient who arrives with one has the most productive appointment of the day.
Here's exactly what to record, a template you can copy, and how to turn the raw numbers into the averages that actually matter.
What to record with every reading
- Date and time — morning vs evening matters; blood pressure follows a daily rhythm.
- Systolic and diastolic — both numbers, exactly as shown. No rounding.
- Pulse — your monitor shows it anyway, and it adds context (see pulse and blood pressure).
- Which arm — stay consistent (use the higher-reading arm), and note it.
- Notes — medication taken or missed, stress, poor sleep, caffeine, exercise, symptoms. This column is where patterns hide.
Record readings immediately. Transcribing from memory an hour later is where most log errors happen — studies of patient-kept logs find a surprising share of misremembered or "improved" numbers.
A simple log template
This layout covers everything a clinician needs. Copy it into a notebook or spreadsheet, one row per reading, two readings per session:
| Date | Time | Systolic | Diastolic | Pulse | Arm | Notes |
|---|---|---|---|---|---|---|
| Mon 6/1 | 07:15 | 128 | 82 | 68 | L | Before meds, slept badly |
| Mon 6/1 | 07:17 | 124 | 80 | 66 | L | 2nd reading |
| Mon 6/1 | 21:30 | 121 | 78 | 64 | L | — |
Use it with the standard 7-day schedule — morning and evening, two readings a minute apart each time, day 1 discarded — described in our measurement guide.
Turning readings into averages
Doctors work from averages, not individual rows. At the end of a 7-day run:
- Cross out day 1 (routine-settling readings run high).
- Average all remaining systolic values; do the same for diastolic.
- Optionally, average mornings and evenings separately — a large morning-evening gap is itself useful information.
A home average at or above 135/85 mmHg roughly corresponds to clinic hypertension at 140/90. Check where your average lands on the blood pressure chart — and bring the whole log to your appointment, not just the summary, so your doctor can see the spread.
Paper vs app: an honest comparison
A paper log works — this template is enough. But after a few weeks, paper starts to cost you: nobody averages 28 readings by hand twice, trends are invisible in a column of digits, and the notebook is never there when the cuff is. An app fixes the boring parts:
- No transcription — point the camera at your monitor and the numbers are read off the display into the log.
- Averages and trends computed for you, with each reading color-coded against the chart categories.
- MAP calculated automatically — the mean arterial pressure figure some clinicians track.
- Doctor-ready export — a clean PDF of your history instead of a photographed notebook page; plus XLSX, CSV, and JSON if you want the raw data.
- Apple Health sync and reminders so morning and evening sessions actually happen.
Whichever you choose, the log you keep consistently beats the perfect one you abandon. Start with what you'll stick to.
Frequently asked questions
How many readings a day should I log?
For a diagnostic week: two sessions daily (morning and evening), two readings per session. For long-term maintenance, a few sessions a week at consistent times is plenty — daily obsessive measuring adds anxiety, not information.
What time should I take my readings?
Morning before medication and breakfast, and again in the evening. Consistency matters more than the exact hour — same times, same arm, same routine, following the technique in our measurement guide.
What format do doctors prefer?
Anything organized and complete: date, time, both numbers, pulse, notes. A typed or printed table (or an app-generated PDF) is easier to scan in a short appointment than handwriting, but any honest, consistent log is welcome.
Should I log readings when I feel unwell?
Yes — with a note saying so. Just don't measure *only* at those moments, or your log becomes a collection of worst cases. The scheduled readings are the backbone; symptomatic ones are annotations.
