📏 Millimeters of mercury to PSI Converter
Convert millimeters of mercury (mmHg) to psi (psi) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 millimeter of mercury (mmHg) = 0.019336777 psi (psi). Formula: psi = mmHg × 0.019336777.
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Millimeters of mercury to PSI Converter inputs
Result
1 mmHg =
0.019336777 psi
psi = mmHg × 0.019336777
1 millimeter of mercury = 0.019336777 psi · psi to mmHg
Millimeters of mercury to PSI conversion table
| Millimeters of mercury (mmHg) | PSI (psi) |
|---|---|
| 0.1 mmHg | 0.0019336777 psi |
| 0.5 mmHg | 0.0096683887 psi |
| 1 mmHg | 0.019336777 psi |
| 2 mmHg | 0.038673555 psi |
| 3 mmHg | 0.058010332 psi |
| 5 mmHg | 0.096683887 psi |
| 10 mmHg | 0.19336777 psi |
| 20 mmHg | 0.38673555 psi |
| 25 mmHg | 0.48341944 psi |
| 50 mmHg | 0.96683887 psi |
| 100 mmHg | 1.9336777 psi |
| 1,000 mmHg | 19.336777 psi |
Other pressure conversions
How to convert millimeters of mercury to psi
Multiply the number of millimeters of mercury by 0.019336777 to get psi: psi = mmHg × 0.019336777.
Example: 5 mmHg = 0.096683887 psi.
The millimeter of mercury (mmHg) and the pound per square inch (psi) are both units of pressure. Need the opposite direction? Use the psi to mmHg converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many psi are in a millimeter of mercury?
1 millimeter of mercury = 0.019336777 psi.
How do I convert millimeters of mercury to psi?
Use the formula psi = mmHg × 0.019336777. For example, 5 mmHg = 0.096683887 psi.
How do I convert psi back to millimeters of mercury?
1 pound per square inch = 51.714925 millimeters of mercury. Use the psi to mmHg converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.