Millimeters Of Mercury to Pascals
An instant millimeters of mercury-to-pascals converter, with the formula and a reference table below.
| Millimeters Of Mercury | Pascals |
|---|---|
| 1 mmHg | 133.322387 Pa |
| 2 mmHg | 266.644775 Pa |
| 3 mmHg | 399.967162 Pa |
| 5 mmHg | 666.611937 Pa |
| 10 mmHg | 1333.223874 Pa |
| 25 mmHg | 3333.059685 Pa |
| 50 mmHg | 6666.119371 Pa |
| 100 mmHg | 13332.238742 Pa |
How to use
- Enter a value in the Millimeters Of Mercury field.
- The Pascals figure appears immediately — no button to press.
- Typing in the Pascals field converts back to Millimeters Of Mercury the same way.
- Use the reference table for the values that come up most often.
Millimeters Of Mercury to Pascals formula
Converting millimeters of mercury to pascals is a single multiplication by 133.322387.
Pa = mmHg × 133.322387
Why this factor: the millimeter of mercury and the pascal are both defined against the pascal, so dividing one definition by the other gives 133.322387 directly. Both definitions are set out in full below.
To go the other way, divide by 133.322387 — or use the Pascals to Millimeters Of Mercury converter, which is the same calculation reversed.
Worked example
Start with 760 mmHg. Multiply by 133.322387 to get 101325.014435 Pa.
760 mmHg × 133.322387 = 101325.014435 Pa
The converter above does this for any value you type, in either direction.
What is a millimeter of mercury?
A millimeter of mercury is the pressure exerted by a 1 mm column of mercury, still standard in medicine.
Definition: Defined as exactly 133.322387415 pascals.
Where it is used: Blood pressure readings, intraocular pressure, and respiratory gas pressures.
Worth knowing: Blood pressure is universally reported in mmHg even in fully metric countries — one of the most durable legacy units in medicine.
What is a pascal?
The pascal is the SI unit of pressure — one newton of force spread over one square meter.
Definition: Defined as 1 N/m². Named after Blaise Pascal.
Where it is used: Scientific and engineering pressure calculations, and weather pressure in hectopascals.
Worth knowing: A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
Millimeters Of Mercury vs Pascals
The millimeter of mercury is a specialized unit while the pascal is an SI unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many pascals are in a millimeter of mercury?
One millimeter of mercury equals 133.322387 pascals.
What is the formula to convert millimeters of mercury to pascals?
Multiply the number of millimeters of mercury by 133.322387. To reverse it, divide by 133.322387 instead.
How do I convert pascals back to millimeters of mercury?
Divide by 133.322387, which is the same as multiplying by 0.00750061576.
How many pascals are in 10 millimeters of mercury?
10 mmHg works out to 1333.223874 Pa.
Is there anything to watch out for with millimeters of mercury?
Blood pressure is universally reported in mmHg even in fully metric countries — one of the most durable legacy units in medicine.
How is the millimeter of mercury defined?
Defined as exactly 133.322387415 pascals.