| Unit | Value |
|---|---|
| Pascal (Pa) | 1 |
| Atmosphere (atm) | 9.8692327e-6 |
| Bar (bar) | 1e-5 |
| Hectopascal (hPa) | 0.01 |
| Kilopascal (kPa) | 0.001 |
| Megapascal (MPa) | 1e-6 |
| Gigapascal (GPa) | 1e-9 |
| Millibar (mbar) | 0.01 |
| Millimeter of Mercury (mmHg) | 0.0075006376 |
| Inch of Mercury (inHg) | 0.00029529971 |
| Pound / Inch² (psi) | 0.00014503768 |
| Torr (Torr) | 0.0075006376 |
| Dyne / Centimeter² (dyn/cm²) | 10 |
This converter uses the pascal (Pa) as its base unit — the SI unit of pressure equal to one newton per square meter. Each pressure unit has a known factor relative to the pascal.
The tool converts by multiplying your input by the source unit’s pascal-equivalent factor, then dividing by the target unit’s factor, all with BigNumber precision.
Convert 2 atmospheres to psi: 2 × 14.696 = 29.392 psi. The factor 14.696 is the number of pounds per square inch in one standard atmosphere (101,325 Pa).
One standard atmosphere (atm) equals approximately 14.696 psi (pounds per square inch). Standard atmospheric pressure is defined as exactly 101,325 pascals.
One bar equals 100,000 pascals, while one atmosphere equals 101,325 pascals. They are close in magnitude (1 atm ≈ 1.01325 bar), but bar is a metric unit while atm is a physical reference based on sea-level air pressure.
A torr is approximately equal to 1 mmHg (millimeter of mercury) and is defined as 1/760 of a standard atmosphere, or about 133.322 pascals. It is commonly used in vacuum science and laboratory settings.