Pound per square inch (psi)
PSI means pound-force per square inch and is common for tires, pumps, and hydraulics.
History: PSI developed from imperial force and area units and settled in machinery, tires, and hydraulics.
Quickly convert PSI to millimeters of mercury without lookup tables or manual math.
This page is focused on converting PSI to millimeters of mercury. Type a number into the first field and the result appears immediately in the second field.
Example: 1 psi = 51.7149252039 mmHg. Conversion formula: result = value × 6894.757293168 / 133.322387415.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
PSI means pound-force per square inch and is common for tires, pumps, and hydraulics.
History: PSI developed from imperial force and area units and settled in machinery, tires, and hydraulics.
The millimeter of mercury is used in medicine, vacuum technology, and barometric measurement.
History: the millimeter of mercury comes from barometers and manometers where pressure balances a mercury column.
Enter a value in the Pound per square inch field. The converter applies the formula "result = value × 6894.757293168 / 133.322387415" and immediately shows the result in millimeters of mercury.
1 psi = 51.7149252039 mmHg.
Yes. Use the swap button or choose the reverse pair from the full conversion list.