A blood pressure classifier that places your reading in the 2025 AHA/ACC categories for adults
The input bar runs across the top of the tool: systolic on the left, diastolic beside it, then the three mode buttons for office, home and 24-hour ambulatory readings, and a reset control. A row of boundary example chips sits underneath, so you can load a reading such as 129/79 or 130/79 without typing it. The result builds below as you type, with no calculate button to press: first the category headline with your reading next to it and a copy button, then four small metric cards for pulse pressure, mean arterial pressure, the threshold the current mode applies and how many mmHg separate you from the next category, then the classification ladder, which highlights your row in office mode. If the reading goes above 180/120, a severe hypertension alert opens under the ladder.
- Pulse pressure
- — Systolic minus diastolic
- Mean arterial pressure
- — Diastolic plus pulse pressure over 3
- Threshold applied
- — From the selected setting
- To the next category
- — How far each number can rise first
This reading is above 180/120 mm Hg. Wait one minute and measure again. If it is still that high and you have no symptoms, contact your healthcare professional. If you have chest pain, shortness of breath, back pain, numbness, weakness, change in vision or difficulty speaking, call 911.
This tool places a blood pressure reading in one of the four categories defined by the 2025 AHA/ACC guideline for adults. It does not diagnose hypertension, does not decide treatment and does not replace a healthcare professional, and a single reading is never a diagnosis on its own. If a reading is above 180/120 together with chest pain, shortness of breath, back pain, numbness, weakness, change in vision or difficulty speaking, call 911. If it is above 180/120 without symptoms, wait one minute, measure again and contact a healthcare professional if it stays that high.
ready to use.
- Visible firstKeep the input and result positions clear.
- Results firstPut the main number up front and keep the process secondary.
- Less to askNo sign-up or extra information before using the tool.
Reading the 2025 AHA/ACC blood pressure chart without guessing
Blood pressure is reported as two numbers, and the chart the American Heart Association and the American College of Cardiology publish for adults treats them as two separate tests. The 2025 guideline draws four office categories: Normal below 120 and below 80, Elevated at 120 to 129 with the diastolic still under 80, Stage 1 hypertension at 130 to 139 or 80 to 89, and Stage 2 hypertension at 140 and above or 90 and above. Hypertension in this chart begins at 130/80.
The part people get wrong is what happens when the two numbers disagree. The chart does not average them, and it does not let the systolic number speak for the pair. You find the band your systolic value falls in, you find the band your diastolic value falls in, and the higher of those two categories is the answer. That single rule is why 132/78 and 128/84 both come out as Stage 1 hypertension, and why 120/80 is not the clean bill of health it is assumed to be.
The four office categories
The 2025 AHA/ACC guideline uses four rows for blood pressure measured in a clinical setting, and there is no gap between them. Once the higher-of-the-two rule is applied, every reading you can take lands in exactly one row. Pay attention to the word joining the two columns, because it decides how each row is triggered.
- Normal: systolic below 120 and diastolic below 80
- Elevated: systolic 120 to 129 and diastolic below 80
- Stage 1 hypertension: systolic 130 to 139 or diastolic 80 to 89
- Stage 2 hypertension: systolic 140 or higher, or diastolic 90 or higher
| Blood pressure categories | Systolic / Diastolic (mm Hg) |
|---|---|
| Normal | Systolic below 120 and diastolic below 80 |
| Elevated | Systolic 120–129 and diastolic below 80 |
| Stage 1 hypertension | Systolic 130–139 or diastolic 80–89 |
| Stage 2 hypertension | Systolic 140 or higher, or diastolic 90 or higher |
Two rows need both numbers, two rows need only one
Normal and Elevated are the only rows that require both numbers to cooperate. To be Normal, the systolic value has to be under 120 and the diastolic value has to be under 80; miss either condition and the row no longer applies. Stage 1 and Stage 2 work the opposite way, where either number on its own is enough. That asymmetry is exactly what the higher-of-the-two rule encodes.
- Normal needs both conditions met, systolic under 120 and diastolic under 80
- Elevated needs both as well, systolic 120 to 129 and diastolic still under 80
- Stage 1 needs only one, systolic 130 to 139 or diastolic 80 to 89
- Stage 2 needs only one, systolic 140 or above or diastolic 90 or above
- Nothing is averaged, and the systolic number has no priority over the diastolic number
The rule the classifier applies
The tool runs three steps in a fixed order and shows the outcome of each one. It is the same procedure you would follow by hand with the chart in front of you, so the answer is always checkable. If the tool and your own reading of the chart disagree, one of you misread a band edge.
- Find the row your systolic value belongs to, using the systolic column only
- Find the row your diastolic value belongs to, using the diastolic column only
- Take whichever of the two rows is higher, and that is your category
- A reassuring number on one axis never pulls the result back down
Worked example: 128/84 is Stage 1, not Elevated
The systolic value of 128 sits in the 120 to 129 band, which points at Elevated. The diastolic value of 84 sits in the 80 to 89 band, which points at Stage 1 hypertension. Stage 1 is the higher of the two, so 128/84 is Stage 1 hypertension. The comfortable-looking systolic number changes nothing here, because the diastolic value on its own is enough to trigger the Stage 1 row.
- Systolic 128 falls in 120 to 129, which is Elevated
- Diastolic 84 falls in 80 to 89, which is Stage 1 hypertension
- The higher of the two wins, so the reading is Stage 1 hypertension
- Pulse pressure is 44 mmHg and mean arterial pressure is about 98.7 mmHg
Worked example: 132/78 is Stage 1 on the systolic number alone
In this reading the diastolic value behaves. At 78 it is under 80, so on its own column it reads as Normal. The systolic value of 132 lands in the 130 to 139 band, which is Stage 1 hypertension, and one number inside that band is all the row asks for. The result is Stage 1 hypertension, with a pulse pressure of 54 mmHg and a mean arterial pressure of 96 mmHg.
- Systolic 132 falls in 130 to 139, which is Stage 1 hypertension
- Diastolic 78 is below 80, which on its own column is Normal
- The higher of the two wins, so the reading is Stage 1 hypertension
- Lower the systolic value to 129 and the same 78 diastolic gives Elevated instead
Worked example: 120/80 is the reading people misfile most often
120/80 has a long reputation as the textbook normal reading, and under this chart it is not normal. Elevated requires a diastolic below 80, and 80 is not below 80. It is the first value in the 80 to 89 band, which is Stage 1 hypertension. So the systolic value of 120 reads as Elevated, the diastolic value of 80 reads as Stage 1, and the higher of the two is what counts: 120/80 is Stage 1 hypertension.
- Systolic 120 falls in 120 to 129, which is Elevated
- Diastolic 80 falls in 80 to 89, which is Stage 1 hypertension
- The result is Stage 1 hypertension, neither Normal nor Elevated
- 119/79 is the neighboring reading that is Normal, since both numbers clear the 120 and 80 cutoffs
- 124/78 is Elevated, because the diastolic value is genuinely below 80
One mmHg is enough to change the row
The bands are defined in whole numbers with no space between them, so readings that look almost identical can sit in different rows. This is why the tool prints how far each number is from the next category. That distance is usually more useful than the category name on its own, because it tells you how much of the result rests on a single point.
- 129/79 is Elevated, since both numbers still satisfy the Elevated conditions
- 130/79 is Stage 1 hypertension, because 130 opens the 130 to 139 band
- 139/89 is Stage 1 hypertension, the top of that row on both columns
- 139/90 is Stage 2 hypertension, on the strength of the diastolic value alone
- 140/90 is Stage 2 hypertension on both columns at once
Above 180/120 the chart stops being the point
A reading above 180/120, meaning a systolic above 180 or a diastolic above 120, is handled outside the four-row chart. With no symptoms and no sign of acute target-organ damage, the AHA calls this severe hypertension: wait one minute, measure again, and if it is still that high, contact a healthcare professional. With symptoms present it is a hypertensive emergency, and the instruction is to call 911. Current AHA material uses the name severe hypertension; the older name was hypertensive crisis.
- Above 180/120 with no symptoms: wait one minute and measure again
- Still that high on the second reading: contact a healthcare professional
- Above 180/120 with symptoms: call 911 rather than waiting to remeasure
- The symptoms are chest pain, shortness of breath, back pain, numbness, weakness, change in vision and difficulty speaking
Home and ambulatory readings run on their own numbers
The four staged rows describe blood pressure measured in a clinical setting. The 2025 guideline sets separate thresholds for measurements taken elsewhere, and the tool switches to them when you change the mode. The out-of-office modes answer a yes or no question about the hypertension threshold instead of naming a stage, because the staged rows are defined for office readings.
- Home monitoring: high blood pressure at 130/80 or above
- Daytime or awake ambulatory monitoring: 130/80 or above, the same line as home
- 24-hour ambulatory average: 125/75 or above, a lower line than the other two
- Office mode is the only mode that highlights a row on the stage ladder
Pulse pressure and mean arterial pressure are extras, not categories
Two derived numbers appear beside the result. Pulse pressure is the systolic value minus the diastolic value, and mean arterial pressure is the diastolic value plus a third of the pulse pressure. Neither one appears anywhere in the AHA/ACC table, and neither can move a reading into a different row. They are calculated here because people track them and want them worked out the same way every time.
- Pulse pressure = systolic minus diastolic
- Mean arterial pressure = diastolic plus pulse pressure divided by 3
- For 132/78: pulse pressure 54 mmHg, mean arterial pressure 96 mmHg
- For 128/84: pulse pressure 44 mmHg, mean arterial pressure about 98.7 mmHg
- Whatever these two values do, the category still comes from the systolic and diastolic bands
What the classifier does not settle
The tool sorts one pair of numbers into one row of a published table, and that is the whole of its job. Hypertension is not established from a single reading, and the guideline itself expects repeated measurements and confirmation outside the office. Treat the category as a way to organize what you are seeing between visits, then take the readings themselves to a clinician.
- It classifies one reading; it does not diagnose, treat or replace a healthcare professional
- The chart is written for adults, and pregnancy sits outside it with a threshold of 140/90 instead
- If a clinician has already set a personal target for you, that target comes first
- It cannot tell whether the reading was taken properly in the first place
Sources and review date
The numbers on this page come from the 2025 AHA/ACC Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults, published in Circulation 2025;152(11):e114-e218, together with the American Heart Association consumer chart Understanding Blood Pressure Readings, last reviewed on August 14, 2025.
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Blood pressure classification questions
Is 120/80 a normal blood pressure reading?
Not under the 2025 AHA/ACC chart. Normal requires a systolic below 120 and a diastolic below 80, and Elevated requires 120 to 129 with the diastolic still below 80. A diastolic of exactly 80 is the first value in the 80 to 89 band, which is Stage 1 hypertension, so the higher-of-the-two rule makes 120/80 a Stage 1 hypertension reading. 119/79 is the nearby reading that really is Normal.
Where does high blood pressure start on this chart?
At 130/80. Hypertension begins as soon as the systolic value reaches 130 or the diastolic value reaches 80, whichever happens first. Below that line there are only two rows: Normal, meaning under 120 and under 80, and Elevated, meaning 120 to 129 with a diastolic under 80. Elevated is not hypertension, but it is the only step between Normal and Stage 1.
What happens when my two numbers fall in different rows?
The higher row wins. Classify each number against its own column, then take the more severe of the two categories. 128/84 is Elevated on the systolic side and Stage 1 hypertension on the diastolic side, so the reading is Stage 1 hypertension. 132/78 is Stage 1 hypertension on the systolic side and below both cutoffs on the diastolic side, so it is also Stage 1 hypertension. The two numbers are never averaged.
Is there a separate category when only the systolic number is high?
No. The AHA/ACC chart has four rows, and none of them is an isolated systolic or isolated diastolic category. A reading of 145/78 is simply Stage 2 hypertension, assigned because 145 is at or above 140. The diastolic value of 78 sitting below 80 does not soften the result or earn the reading a different label.
Does a single Stage 1 reading mean I have hypertension?
No. A category describes what one measurement looks like on a chart, not what a person has. One reading of 138/86 puts that measurement in Stage 1 hypertension, and the guideline still expects repeated measurements and confirmation outside the office before anyone concludes anything about the person. Bring a set of readings to a clinician rather than a single number.
My reading is above 180/120 but I feel fine. What should I do?
That situation is severe hypertension: a reading above 180/120 with no symptoms and no acute target-organ damage. Wait one minute and measure again. If it is still that high on the second reading, contact a healthcare professional. Current AHA material calls this severe hypertension; the older name for it was hypertensive crisis.
When is it a 911 call instead?
When a reading above 180/120 comes together with symptoms. That combination is a hypertensive emergency, and the AHA instruction is to call 911. The symptoms listed are chest pain, shortness of breath, back pain, numbness, weakness, change in vision and difficulty speaking. If any of them are present, call rather than waiting a minute to remeasure.
Do the same thresholds apply to my home monitor?
The stage names are defined for office readings, but the 2025 guideline gives the out-of-office equivalents. Home monitoring counts as high blood pressure at 130/80 or above, and daytime or awake ambulatory monitoring uses the same 130/80. A 24-hour ambulatory average uses a lower line at 125/75 or above. Changing the mode in the tool changes the threshold, and the out-of-office modes report whether you are above or below the line rather than naming a stage.
What are pulse pressure and mean arterial pressure?
Pulse pressure is the systolic value minus the diastolic value, and mean arterial pressure is the diastolic value plus a third of the pulse pressure. For 132/78 that works out to a pulse pressure of 54 mmHg and a mean arterial pressure of 96 mmHg. Neither number appears in the AHA/ACC table, so neither one can change which of the four categories a reading is assigned to.
Does this chart apply during pregnancy?
No. Pregnancy sits outside this table, and high blood pressure in pregnancy is defined at 140/90 rather than 130/80. If you are pregnant, follow the thresholds and the monitoring your obstetric clinician has given you, and treat anything on this page as background reading rather than as something that applies to you.