TempoLife › Features › Blood pressure log and classifier
Blood pressure log
Log your blood pressure readings, see the European and American category for each, average them over 7 and 30 days, and print a chart for your doctor. Readings stay in your browser.
This tool records and categorises numbers you enter. It does not diagnose anything and it is not medical advice. Only a clinician can diagnose or treat high blood pressure, and a single reading rarely means much on its own.
Add a reading
No readings yet. Add one above, or read the guidance below — it works without adding anything.
What the numbers mean
Blood pressure is written as systolic over diastolic in millimetres of mercury (mmHg): the pressure when the heart beats, over the pressure when it rests between beats. The two most-used guideline systems draw their lines in different places, so the same reading can land in a different category depending on which one your clinician follows. Both are shown here.
ESC/ESH 2023 (Europe)
| Category | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Optimal | 0–119 | 0–79 |
| Normal | 120–129 | 80–84 |
| High-normal | 130–139 | 85–89 |
| Grade 1 hypertension | 140–159 | 90–99 |
| Grade 2 hypertension | 160–179 | 100–109 |
| Grade 3 hypertension | ≥ 180 | ≥ 110 |
Source: European Society of Cardiology / European Society of Hypertension 2023 guidelines · checked 2026-09-02
ACC/AHA 2017 (United States)
| Category | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Normal | 0–119 | 0–79 |
| Elevated | 120–129 | and 0–79 |
| Stage 1 hypertension | 130–139 | 80–89 |
| Stage 2 hypertension | 140–179 | 90–119 |
| Hypertensive crisis | ≥ 180 | ≥ 120 |
Source: American College of Cardiology / American Heart Association 2017 guideline · checked 2026-09-02
How to measure it properly
A reading is only as good as the way it was taken, and small mistakes move the number by more than most treatments do. To get a figure worth recording:
- Sit quietly for five minutes first, back supported, legs uncrossed, feet flat on the floor.
- Rest your arm on a table so the cuff is level with your heart.
- Use a validated upper-arm cuff of the right size. A cuff that is too small reads high.
- Do not talk, and do not measure straight after coffee, a cigarette or exercise.
- Take two readings a minute apart and record the average, not the lower one.
- Measure at the same times each day. Morning-before-medicine and evening is a common pattern.
One high reading is not hypertension. Blood pressure moves through the day and rises with stress, pain, a full bladder and the doctor's waiting room. What matters is the pattern across many readings, which is exactly what a log like this is for.
When a number means act now
A reading at or above 180/120 mmHg, especially with chest pain, breathlessness, weakness, trouble speaking, vision change or a severe headache, is a medical emergency. Do not sit and re-measure — seek urgent care.
Short of that, a run of readings above your guideline's threshold is a reason to see a clinician, not a reason to panic or to start or stop any medicine on your own. Bring the printed log with you: a fortnight of home readings is more useful to a doctor than a single measurement in the surgery.
Frequently asked questions
Is my data uploaded anywhere?
No. Readings are stored only in this browser, on this device. There is no account, no cookie and nothing is sent to TempoLife. Clearing your browser data removes them, and they do not sync to another device.
Why do the European and American categories differ?
The 2017 American guideline lowered the threshold for "hypertension" to 130/80, while the 2023 European guideline keeps 140/90 as the line for grade 1 hypertension and calls 130–139/85–89 "high-normal". Same reading, different label. Your clinician will use one of them.
Which reading counts if the top and bottom numbers disagree?
The higher category wins. A reading of 145/85 is grade 1 hypertension on the European scale because the systolic value alone reaches that band, even though the diastolic is only high-normal.
How many readings do I need?
Home monitoring guidance usually asks for readings twice a day for about a week, discarding the first day, then averaging the rest. One or two readings are not enough to judge anything.
Can this replace a doctor?
No. It organises numbers you can take to a doctor. Diagnosis, and any decision about medication, is theirs to make.
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