Blood Pressure Calculator
Type in a reading from your monitor to see which category it falls into under the four main guidelines: AHA/ACC (US), ESH 2023 and ESC 2024 (Europe) and JSH2025 (Japan). They don't agree: 125/82 is "Stage 1 hypertension" in the US and "Normal" under ESH. Below that, paste a week of home readings to get the average guidelines actually use. Nothing leaves your browser.
Not medical advice. This shows each guideline's category for the numbers you enter. It is not a diagnosis; talk to your doctor about your readings. If a reading is above 180/120, or you have chest pain, shortness of breath, weakness or vision/speech changes, call emergency services.
Blood pressure charts by guideline
All values in mmHg. A reading belongs to the highest category reached by either number ("and/or").
AHA/ACC 2025 (United States)
| Category | Systolic | Diastolic | |
|---|---|---|---|
| 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 |
| Severe (hypertensive crisis range) | above 180 | and/or | above 120 |
The 2025 guideline kept the 2017 categories. AHA uses the same chart for home readings; its home threshold for hypertension is 130/80.
ESH 2023 (Europe)
| Category (clinic readings) | Systolic | Diastolic | |
|---|---|---|---|
| Optimal | below 120 | and | below 80 |
| Normal | 120–129 | and/or | 80–84 |
| High normal | 130–139 | and/or | 85–89 |
| Grade 1 hypertension | 140–159 | and/or | 90–99 |
| Grade 2 hypertension | 160–179 | and/or | 100–109 |
| Grade 3 hypertension | 180 or higher | and/or | 110 or higher |
| Isolated systolic hypertension | 140 or higher | and | below 90 |
ESH grades are defined for clinic readings. For home readings ESH gives one threshold: an average of 135/85 or higher counts as hypertension.
ESC 2024 (Europe)
| Category | Clinic | Home average |
|---|---|---|
| Non-elevated | below 120/70 | below 120/70 |
| Elevated | 120–139 / 70–89 | 120–134 / 70–84 |
| Hypertension | 140/90 or higher | 135/85 or higher |
JSH2025 (Japan)
| Category | Clinic | Home |
|---|---|---|
| Normal | below 120 and below 80 | below 115 and below 75 |
| High-normal | 120–129 and below 80 | 115–124 and below 75 |
| Elevated | 130–139 and/or 80–89 | 125–134 and/or 75–84 |
| Grade I hypertension | 140–159 and/or 90–99 | 135–144 and/or 85–89 |
| Grade II hypertension | 160–179 and/or 100–109 | 145–159 and/or 90–99 |
| Grade III hypertension | 180 or higher and/or 110 or higher | 160 or higher and/or 100 or higher |
JSH2025 kept the JSH2019 classification. It is the only one of the four with a full home table.
How to take home readings that count
- Sit for 1–2 minutes with your back supported, feet flat, arm resting at heart height. No coffee, smoking or exercise in the 30 minutes before.
- Morning: within an hour of waking, after using the toilet, before breakfast and before blood pressure medication. Take two readings a minute apart.
- Evening: before bed, two readings a minute apart.
- Repeat for 7 days (at least 3), then average everything except the first day. Write down the time and the arm you used.
FAQ
Why do the guidelines disagree?
They set different cut-offs for what counts as high. The US AHA/ACC guideline starts hypertension at 130/80; ESH, ESC and JSH start it at 140/90 for clinic readings. Your doctor will usually follow the guideline used in your country.
Are home readings lower than at the clinic?
Usually, yes: many people are tense at the doctor's ("white-coat effect"). That's why ESH, ESC and JSH use lower home thresholds (135/85 instead of 140/90).
What is isolated systolic hypertension?
Only the upper number is high (for ESH: 140 or more while the lower number stays below 90). It is common in older adults.
What counts as low blood pressure?
None of these guidelines has a low category. Below 90/60 is the common rule of thumb; it is only a concern if you have symptoms such as dizziness or fainting.
Sources
- 2025 AHA/ACC Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults
- 2023 ESH Guidelines for the management of arterial hypertension
- 2024 ESC Guidelines for the management of elevated blood pressure and hypertension
- JSH2025 guidelines for the management of hypertension (Hypertension Research)
Tables checked against these sources on 2026-10-04. Deutsch · 日本語. Built by Cairnware; questions or corrections: [email protected].