Pressure Converter
Convert between Pascal, Bar, PSI, atmospheres, torr and more pressure units.
What is Pressure?
Pressure is the force applied perpendicular to the surface of an object per unit area. It's measured in various units depending on the application - Pascal (SI unit), Bar (meteorology), PSI (engineering in US), and atmospheres (reference to air pressure).
Common applications include tire pressure (PSI or bar), blood pressure (mmHg), weather (millibars or inHg), and industrial processes (kPa or MPa).
Pressure Conversion Formulas
| From | To | Multiply by |
|---|---|---|
| 1 bar | Pascal | 100,000 |
| 1 bar | PSI | 14.5038 |
| 1 atm | Pascal | 101,325 |
| 1 atm | bar | 1.01325 |
| 1 PSI | kPa | 6.89476 |
| 1 torr | Pascal | 133.322 |
Common Pressure Values
- Standard atmosphere: 101.325 kPa = 1 atm = 14.7 PSI
- Car tire pressure: 30-35 PSI (207-241 kPa)
- Bicycle tire: 80-130 PSI
- Blood pressure (normal): 120/80 mmHg
Frequently Asked Questions
What is the difference between PSI and bar?
PSI (pounds per square inch) is common in the US, while bar is used in Europe and most other countries. 1 bar ≈ 14.5 PSI. For tire pressure, US uses PSI while Europe uses bar or kPa.
What is atmospheric pressure?
Atmospheric pressure (1 atm) is the pressure exerted by Earth's atmosphere at sea level - about 101.325 kPa or 14.7 PSI. It decreases with altitude.
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