How to convert mmHg to PSI
To convert mmHg to PSI, multiply by 0.0193367774595. Pressure conversions are used for tire inflation, weather, scuba diving, hydraulics and medical devices.
mmHg to PSI conversion table
| mmHg (mmHg) | PSI (psi) |
|---|---|
| 0.1 mmHg | 0.00193367774595 psi |
| 0.5 mmHg | 0.00966838872973 psi |
| 1 mmHg | 0.0193367774595 psi |
| 2 mmHg | 0.0386735549189 psi |
| 3 mmHg | 0.0580103323784 psi |
| 4 mmHg | 0.0773471098378 psi |
| 5 mmHg | 0.0966838872973 psi |
| 10 mmHg | 0.193367774595 psi |
| 20 mmHg | 0.386735549189 psi |
| 25 mmHg | 0.483419436487 psi |
| 50 mmHg | 0.966838872973 psi |
| 100 mmHg | 1.93367774595 psi |
| 500 mmHg | 9.66838872973 psi |
| 1,000 mmHg | 19.3367774595 psi |
About the units
mmHg (mmHg)
Millimeters of mercury are used for blood pressure and barometric readings (1 mmHg ≈ 133.322 Pa).
PSI (psi)
Pounds per square inch is the US unit for tire, air compressor and hydraulic pressure.
How to use this converter
- Type the number of mmHg (mmHg) in the input box.
- The result in PSI appears instantly — no button needed.
- See the same value in every other pressure unit just below.
- Use “Swap units” to convert PSI back to mmHg.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many PSI are in one mmhg?
One mmhg equals 0.0193367774595 PSI. 0.0193367774595 is the exact factor used by this converter.
How do I convert mmHg to PSI?
Multiply the value in mmHg by 0.0193367774595. To go the other way, multiply PSI by 51.7149252039.
What is 10 mmHg in psi?
10 mmHg = 0.193367774595 psi. Also, 5 mmHg = 0.0966838872973 psi and 100 mmHg = 1.93367774595 psi.
What is the difference between a mmhg and a psi?
Millimeters of mercury are used for blood pressure and barometric readings (1 mmHg ≈ 133.322 Pa). Pounds per square inch is the US unit for tire, air compressor and hydraulic pressure.
Is this tool free and private?
Yes — the mmHg to PSI is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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