Home› Conversions› Pressure› Psi to MmHg
Pressure
Psi to MmHg
Convert psi (psi) to mmHg (mmHg). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 psi = 51.7151 mmHg
Psi to MmHg Conversion Table
Common values, ready to copy:
| psi | mmHg |
|---|---|
| 1 psi | 51.7151 mmHg |
| 2 psi | 103.43 mmHg |
| 5 psi | 258.58 mmHg |
| 10 psi | 517.15 mmHg |
| 25 psi | 1292.88 mmHg |
| 50 psi | 2585.75 mmHg |
| 100 psi | 5171.51 mmHg |
| 1,000 psi | 51715.1 mmHg |
Formula
mmHg = psi × 5.17150958e+1
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
About Psi and MmHg
Psi (psi): Pounds-force per square inch, the customary US pressure unit; 1 psi = 6,894.76 Pa. Common uses: US tire pressure (car tires typically 30-35 psi), US gas grills (10-12 psi propane), industrial hydraulics in the US, and US plumbing pressure specifications.
MmHg (mmHg): Millimeters of mercury; the pressure exerted by a column of mercury that height; a torr is essentially identical (1 mmHg ≈ 1 torr to within 1 part in 7 million). Common uses: Blood pressure (systolic over diastolic, in mmHg), vacuum systems, barometric pressure in some medical and scientific contexts.
How the conversion works
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
The exact relationship is mmHg = psi × 5.17150958e+1, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between psi and mmHg comes up wherever pressure measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.