Pounds per square inch Converter
Convert Pounds per square inch (psi) to any other pressure unit. The table below gives the exact figure for each unit, and every conversion is worked from the same engine as the converter.
What pounds per square inch convert to
One psi in every other pressure unit.
| Unit | 1 psi | Reverse |
|---|---|---|
| Pascals | 6,894.757293 Pa | 1.4504e-4 psi |
| Kilopascals | 6.894757 kPa | 0.145038 psi |
| Megapascals | 0.006895 MPa | 145.037738 psi |
| Bar | 0.068948 bar | 14.503774 psi |
| Millibar | 68.947573 mbar | 0.014504 psi |
| Atmospheres | 0.068046 atm | 14.695949 psi |
| Millimeters of mercury | 51.714925 mmHg | 0.019337 psi |
| Inches of mercury | 2.03602 inHg | 0.491154 psi |
Multiply a pounds per square inch figure by the figure in the second column to get the unit in the first, or multiply by the third column to go the other way.
Pounds per square inch conversion reference
Pounds per square inch to Pascals
One pounds per square inch is 6,894.757293 pascals, and one pascals is 1.4504e-4 pounds per square inch.
The pascal is the SI unit of pressure: one newton per square meter. It is used in science and engineering, usually as kilopascals or megapascals.
- 1 psi= 6,894.757293 Pa
- 2 psi= 13,789.514586 Pa
- 5 psi= 34,473.786466 Pa
Pounds per square inch to Kilopascals
One pounds per square inch is 6.894757 kilopascals, and one kilopascals is 0.145038 pounds per square inch.
A kilopascal is 1,000 pascals. It is the unit for tyre pressure in metric countries, and is used for gas and weather pressures.
- 1 psi= 6.894757 kPa
- 2 psi= 13.789515 kPa
- 5 psi= 34.473786 kPa
Pounds per square inch to Megapascals
One pounds per square inch is 0.006895 megapascals, and one megapascals is 145.037738 pounds per square inch.
A megapascal is 1,000 kilopascals, or one million pascals. It is used for concrete strength, where structural concrete is typically specified between 20 and 40 MPa.
- 1 psi= 0.006895 MPa
- 2 psi= 0.01379 MPa
- 5 psi= 0.034474 MPa
Pounds per square inch to Bar
One pounds per square inch is 0.068948 bar, and one bar is 14.503774 pounds per square inch.
One bar is exactly 100,000 pascals, slightly less than one atmosphere. It is used for tyre pressure, industrial gases and weather charts.
- 1 psi= 0.068948 bar
- 2 psi= 0.137895 bar
- 5 psi= 0.344738 bar
Pounds per square inch to Millibar
One pounds per square inch is 68.947573 millibar, and one millibar is 0.014504 pounds per square inch.
A millibar is 100 pascals, identical to the hectopascal used in weather reports. Average sea-level pressure is about 1,013 millibars.
- 1 psi= 68.947573 mbar
- 2 psi= 137.895146 mbar
- 5 psi= 344.737865 mbar
Pounds per square inch to Atmospheres
One pounds per square inch is 0.068046 atmospheres, and one atmospheres is 14.695949 pounds per square inch.
One atmosphere is exactly 101,325 pascals, the average air pressure at sea level. It is used for gas calculations and diving tables.
- 1 psi= 0.068046 atm
- 2 psi= 0.136092 atm
- 5 psi= 0.34023 atm
Pounds per square inch to Millimeters of mercury
One pounds per square inch is 51.714925 millimeters of mercury, and one millimeters of mercury is 0.019337 pounds per square inch.
One millimeter of mercury is 133.322387415 pascals. It is still used for blood-pressure readings, where 120/80 mmHg is the familiar healthy range.
- 1 psi= 51.714925 mmHg
- 2 psi= 103.42985 mmHg
- 5 psi= 258.574626 mmHg
Open the Pounds per square inch to Millimeters of mercury converter
Pounds per square inch to Inches of mercury
One pounds per square inch is 2.03602 inches of mercury, and one inches of mercury is 0.491154 pounds per square inch.
One inch of mercury is 3,386.389 pascals. It is used for barometric pressure and altimeter settings in aviation in the United States.
- 1 psi= 2.03602 inHg
- 2 psi= 4.072041 inHg
- 5 psi= 10.180102 inHg
Open the Pounds per square inch to Inches of mercury converter
What pounds per square inch are used for
One psi (pound per square inch) is 6,894.757293168 pascals. It is the tyre-pressure and hydraulic unit in the United States and the UK.
Bar, atmosphere and psi are exact definitions. Gauges and weather stations round heavily, so treat the last digit as indicative rather than precise.
Pressure units are all defined against the pascal, so the conversion is a multiplication by a fixed number. What makes this dimension awkward is that the numbers sit within tens of per cent of each other, so a small slip looks plausible.
Three of the units are close together on purpose: one bar is 100,000 pascals, one atmosphere is 101,325, and weather reports use millibars and hectopascals, which are the same size. A reading that looks like a unit error is often a genuine difference between gauge pressure and absolute pressure instead.
Checking a pressure conversion means converting through pascals and comparing with a known reference, such as the fact that a bar and an atmosphere differ by about 1.3%. The error to watch for is quoting a pressure without saying whether it is measured above atmospheric pressure or from a vacuum.
Pounds per square inch conversion tables
Pounds per square inch to Pascals
| Pounds per square inch (psi) | Pascals (Pa) |
|---|---|
| 1 | 6,894.757293 |
| 2 | 13,789.514586 |
| 3 | 20,684.27188 |
| 4 | 27,579.029173 |
| 5 | 34,473.786466 |
| 10 | 68,947.572932 |
| 25 | 172,368.932329 |
| 50 | 344,737.864658 |
| 100 | 689,475.729317 |
Pounds per square inch to Kilopascals
| Pounds per square inch (psi) | Kilopascals (kPa) |
|---|---|
| 1 | 6.894757 |
| 2 | 13.789515 |
| 3 | 20.684272 |
| 4 | 27.579029 |
| 5 | 34.473786 |
| 10 | 68.947573 |
| 25 | 172.368932 |
| 50 | 344.737865 |
| 100 | 689.475729 |
Pounds per square inch to Megapascals
| Pounds per square inch (psi) | Megapascals (MPa) |
|---|---|
| 1 | 0.006895 |
| 2 | 0.01379 |
| 3 | 0.020684 |
| 4 | 0.027579 |
| 5 | 0.034474 |
| 10 | 0.068948 |
| 25 | 0.172369 |
| 50 | 0.344738 |
| 100 | 0.689476 |