A private blood pressure log with averages, a chart and a doctor-ready report
This blood pressure log is a simple place to record home readings: systolic and diastolic pressure, pulse, which arm you used, whether you were sitting, standing or lying down, and a short note. Every reading is labelled with its category from the 2017 ACC/AHA guideline — normal, elevated, stage 1, stage 2 or hypertensive crisis — and the log works out your averages for the last 7 and 30 days and for mornings and evenings separately.
A blood pressure chart and category checker marks the reading you type on a colour-coded chart of systolic against diastolic pressure and compares its category under four guidelines — 2017 ACC/AHA (unchanged in 2025), 2024 ESC, 2023 ESH and the UK’s NICE NG136, beside a table of average blood pressure by age and sex. A trend chart and a printable report (paper, PDF or PNG) give your doctor what they need. Readings stay in this browser on this device; export a CSV to back them up.
The log is informational and not medical advice. Only a doctor can diagnose high blood pressure or decide on treatment.
How to use the Blood Pressure Log
- Sit quietly for five minutes, then measure with a validated upper-arm monitor.
- Enter the Systolic and Diastolic numbers, and the Pulse if you want; the category appears as you type.
- Check the Date and time, choose the Arm and Position, add a note such as “before tablets”, and press Add reading.
- Pick a guideline in the checker to compare categories. Delete a mistaken entry with the bin icon (and undo if needed).
- Before an appointment, choose the period, add your name if you like, and press Print report or Download PDF.
- Use Export CSV regularly as a backup.
Blood Pressure Log features
ACC/AHA categories per reading
Each reading and average gets its 2017 ACC/AHA category; the higher category applies when the numbers differ.
Meaningful averages
Last 7 and 30 days, mornings, evenings and all readings — doctors use averages, not single readings.
Trend chart
Systolic and diastolic lines with dashed reference lines at 130 and 80 mmHg.
Report for your doctor
A4 or Letter report with summary, chart and every reading — print, PDF or PNG.
CSV export and import
Spreadsheet-friendly file with a category column; importing skips duplicates and invalid rows.
Four guidelines on one chart
ACC/AHA, ESC 2024, ESH 2023 and NICE bands, with your reading marked.
Blood pressure categories explained
Blood pressure is written as systolic over diastolic, in millimetres of mercury (mmHg). The 2017 ACC/AHA guideline for adults uses these categories; if the two numbers fall into different categories, the higher one applies. A reading of 128/79 is therefore “elevated”, while 135/85 is “stage 1” because of both numbers.
| Category | Systolic (top) | Diastolic (bottom) |
|---|---|---|
| Normal | below 120 | and below 80 |
| Elevated | 120–129 | and below 80 |
| Stage 1 hypertension | 130–139 | or 80–89 |
| Stage 2 hypertension | 140 or higher | or 90 or higher |
| Hypertensive crisis | higher than 180 | and/or higher than 120 |
Blood pressure chart by age, sex and guideline
For adults, the categories do not change with age or sex; what differs between countries is where the lines are drawn. The European ESC 2024 guideline calls 120–139/70–89 “elevated” and starts hypertension at 140/90; the ESH 2023 guideline grades hypertension 1 to 3 from 140/90, 160/100 and 180/110; NICE uses 140/90 in clinic and 135/85 for home averages. The age table shows measured US averages (NHANES 2001–2008): systolic pressure rises with age, faster in women after 60 — an average, not a healthy target. Children’s blood pressure is judged by age, sex and height percentiles and is not covered here; in pregnancy, 140/90 or higher needs prompt review.
How to take an accurate home reading
- Avoid caffeine, smoking and exercise for 30 minutes beforehand, and empty your bladder.
- Sit with your back supported, feet flat on the floor, legs uncrossed, and the cuff on bare skin at heart level.
- Rest for five minutes and do not talk during the measurement.
- Take two readings a minute apart, morning and evening, and record both. Many doctors ask for a week of readings before a visit.
- Use the same arm each time — the one that gave the higher reading if your doctor compared both.
- Your doctor interprets your numbers against the guideline they use — many in India and Europe use 140/90 in clinic and 135/85 at home.
When to seek help
A reading above 180 systolic or 120 diastolic should be repeated after five minutes. If it stays that high, contact a doctor promptly; with symptoms such as chest pain, shortness of breath, back pain, numbness or weakness, vision changes or difficulty speaking, call emergency services. Very low readings with dizziness or fainting also need medical advice. For heart-rate training ranges see the heart rate zone calculator, and if you also check glucose, the blood sugar log works the same way.
Blood Pressure Log FAQ
What should I record in a blood pressure log?
The date and time, systolic and diastolic pressure, pulse, arm, position and anything that could affect the reading, such as a missed tablet or a late night.
Is 130/80 high blood pressure?
Under the 2017 ACC/AHA guideline, 130–139 systolic or 80–89 diastolic is stage 1 hypertension. Some other guidelines start at 140/90. One reading is not a diagnosis — your doctor looks at averages over days or weeks.
What is normal blood pressure by age?
The categories are the same for adults of every age and for men and women: below 120/80 is normal under ACC/AHA (below 120/70 is “non-elevated” under ESC 2024). Average readings rise with age — about 119/70 for men and 110/68 for women aged 18–39, and 133/69 and 139/68 at 60 and over in US survey data — but higher averages are not healthier.
Why are my morning and evening readings different?
Blood pressure follows a daily rhythm and usually rises in the morning. Medication timing, meals, caffeine and stress all play a part, which is why the log shows morning and evening averages separately.
Where is my data stored?
Only in your browser’s local storage on this device. Nothing is uploaded. Clearing browser data deletes it, so export a CSV from time to time.
Can I import readings from my monitor’s app?
If the app exports CSV, rename its columns to date, time, systolic and diastolic (pulse, arm, position and note are optional) and use Import CSV. Duplicate and invalid rows are skipped.
Does this replace seeing a doctor?
No. The log helps you and your doctor see patterns, but diagnosis and treatment decisions need a medical professional.