Millimeters Of Mercury to Psi
Convert millimeters of mercury to psi instantly — one millimeter of mercury is 0.0193368 psi.
| Millimeters Of Mercury | Psi |
|---|---|
| 1 mmHg | 0.019337 psi |
| 2 mmHg | 0.038674 psi |
| 3 mmHg | 0.05801 psi |
| 5 mmHg | 0.096684 psi |
| 10 mmHg | 0.193368 psi |
| 25 mmHg | 0.483419 psi |
| 50 mmHg | 0.966839 psi |
| 100 mmHg | 1.933678 psi |
How to use
- Enter a value in the Millimeters Of Mercury field.
- The Psi figure appears immediately — no button to press.
- Typing in the Psi 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 Psi formula
The factor from millimeters of mercury to psi is 0.0193367775.
psi = mmHg × 0.0193367775
Why this factor: the millimeter of mercury and the pound per square inch are both defined against the pascal, so dividing one definition by the other gives 0.0193367775 directly. Both definitions are set out in full below.
To go the other way, divide by 0.0193367775 — or use the Psi to Millimeters Of Mercury converter, which is the same calculation reversed.
Worked example
Given 32 mmHg, multiplying by 0.0193367775 yields 0.618777 psi.
32 mmHg × 0.0193367775 = 0.618777 psi
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 pound per square inch?
Pounds per square inch is the standard pressure unit in the United States.
Definition: One pound-force per square inch, which is about 6,894.757 pascals.
Where it is used: US tire pressure, compressed air and hydraulic systems, and plumbing water pressure.
Millimeters Of Mercury vs Psi
The millimeter of mercury is a specialized unit while the pound per square inch is a US customary 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 psi are in a millimeter of mercury?
One millimeter of mercury equals 0.0193367775 psi.
What is the formula to convert millimeters of mercury to psi?
Multiply the number of millimeters of mercury by 0.0193367775. To reverse it, divide by 0.0193367775 instead.
How do I convert psi back to millimeters of mercury?
Divide by 0.0193367775, which is the same as multiplying by 51.7149252.
How many psi are in 10 millimeters of mercury?
10 mmHg works out to 0.193368 psi.
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.