Convert between different pressure units including Pascal, bar, psi, atmosphere, mmHg, and more.
| From | To | Multiply by |
|---|---|---|
| 1 bar | Pa | 100,000 |
| 1 bar | psi | 14.5038 |
| 1 atm | bar | 1.01325 |
| 1 atm | mmHg | 760 |
| 1 psi | kPa | 6.89476 |
| 1 kg/cm² | bar | 0.980665 |
The Pascal (Pa) is the SI unit of pressure, equal to one newton per square meter (N/m²). Common multiples: 1 kPa = 1,000 Pa, 1 MPa = 1,000,000 Pa. Standard atmospheric pressure is 101,325 Pa.
Bar is a metric unit commonly used in engineering. 1 bar = 100,000 Pa ≈ 0.987 atm. Millibar (mbar) is used in meteorology for atmospheric pressure (standard: 1013.25 mbar).
PSI is commonly used in the US and UK for tire pressure, hydraulics, and compressed gas. Typical car tire pressure: 30-35 psi. 1 psi ≈ 6.895 kPa ≈ 0.0689 bar.
mmHg (millimeters of mercury) is used for blood pressure and vacuum measurements. Normal blood pressure: 120/80 mmHg. 1 mmHg = 1 Torr ≈ 133.3 Pa. Standard atmosphere = 760 mmHg.
Recommended tire pressures: Cars 30-35 psi (2.0-2.4 bar), Bicycles 80-130 psi (5.5-9 bar), Mountain bikes 25-35 psi (1.7-2.4 bar). Always check your vehicle manual for exact specifications.