Enter the pressure in pascals (Pa) and select the target unit to convert the value into kilopascals (kPa), megapascals (MPa), bar, standard atmospheres (atm), millimeters of mercury (mmHg), pounds per square inch (psi), or torr.
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Pa Conversion Formula
The following formula is used to convert a pressure value in pascals to another pressure unit.
P_{target} = Pa / CVariables:
- Ptarget is the converted pressure value in the selected unit
- Pa is the pressure in pascals
- C is the number of pascals in one unit of the target scale
To convert from pascals, divide the pressure in Pa by the number of pascals that make up one unit of the target pressure scale.
Common Pa Conversion Relationships
A pressure in Pa can be converted to another unit by dividing by the number of pascals that make up one unit of the target unit.
- kPa = Pa ÷ 1000
- MPa = Pa ÷ 1,000,000
- bar = Pa ÷ 100,000
- atm = Pa ÷ 101,325
- mmHg = Pa ÷ 133.32
- psi = Pa ÷ 6894.76
- torr = Pa ÷ 133.32
For example, a standard atmospheric pressure of 101325 Pa is equal to about 101.325 kPa, 0.101325 MPa, 1.01325 bar, 1 atm, about 760 mmHg, about 14.696 psi, and about 760 torr.
What is a Pascal?
The pascal (Pa) is the SI base unit for pressure. In many scientific, engineering, and industrial applications, larger pressure units are often more convenient to use, including kilopascals, megapascals, bar, atmospheres, millimeters of mercury, psi, and torr. Each of these units has a fixed numerical relationship to the pascal, which makes conversions straightforward.
How to Convert Pa to Other Pressure Units?
The following steps outline how to convert Pa to other common pressure units.
- First, determine the pressure value in pascals (Pa).
- Next, identify the target unit such as kPa, MPa, bar, atm, mmHg, psi, or torr.
- Find the number of pascals in one unit of the target scale.
- Divide the pressure in Pa by that conversion constant.
- Check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Pressure (Pa) = 101325
Target Unit = psi
Converted Pressure = 101325 ÷ 6894.76 = 14.696 psi
Pa to Other Pressure Units Conversion Table
The table below converts a pressure of 100000 Pa into several common pressure units.
| Target Unit | Conversion Factor | 100000 Pa in That Unit |
|---|---|---|
| Kilopascal (kPa) | 1 kPa = 1,000 Pa | 100 kPa |
| Megapascal (MPa) | 1 MPa = 1,000,000 Pa | 0.10 MPa |
| Bar (bar) | 1 bar = 100,000 Pa | 1 bar |
| Standard Atmosphere (atm) | 1 atm = 101,325 Pa | 0.9869 atm |
| Millimeters of Mercury (mmHg) | 1 mmHg ≈ 133.32 Pa | 750.06 mmHg |
| Pounds per Square Inch (psi) | 1 psi ≈ 6,894.76 Pa | 14.50 psi |
| Torr (torr) | 1 torr ≈ 133.32 Pa | 750.06 torr |
Different fields prefer different pressure units, but they are all directly related to the pascal through fixed conversion constants. This makes it easy to translate pressure readings into whichever unit is most useful for the problem at hand.