PSI Calculator – Pressure Unit Converter
Convert PSI to bar, kPa, MPa, atm, torr, and Pa
Table of Contents
How to Use
- Enter the PSI value you want to convert
- Select the target pressure unit
- Click calculate to see the conversion result
- View all equivalent pressure values in different units
What is PSI?
PSI (Pounds per Square Inch) is a unit of pressure commonly used in the United States and other countries that use the imperial system. It measures the amount of force applied over an area of one square inch.
PSI is widely used in automotive applications, particularly for tire pressure, as well as in industrial settings for compressed air systems, hydraulic equipment, and pressure vessels.
Common PSI Conversions
| PSI | Bar | kPa | Common Use |
|---|---|---|---|
| 1 PSI | 0.069 | 6.895 | Low pressure systems |
| 10 PSI | 0.689 | 68.95 | Bicycle tires |
| 30 PSI | 2.069 | 206.85 | Car tires |
| 100 PSI | 6.895 | 689.5 | Industrial air tools |
| 200 PSI | 13.79 | 1,379 | High-pressure hydraulics |
PSI Applications
- Automotive: Tire pressure monitoring, fuel system pressure
- Industrial: Compressed air systems, pneumatic tools
- HVAC: Refrigerant pressures, system diagnostics
- Plumbing: Water pressure testing, system design
- Engineering: Material stress testing, structural analysis
Frequently Asked Questions
- What does PSI stand for?
- PSI stands for Pounds per Square Inch, which is a unit of pressure representing the force of one pound-force applied to an area of one square inch.
- How do I convert PSI to bar?
- To convert PSI to bar, multiply the PSI value by 0.0689476. For example, 30 PSI × 0.0689476 = 2.068 bar.
- What's the normal tire pressure in PSI?
- Most passenger cars recommend tire pressure between 30-35 PSI when cold. Always check your vehicle's door jamb or owner's manual for the specific recommended pressure.
- Is PSI the same as PSIG?
- PSI measures absolute pressure, while PSIG (PSI Gauge) measures pressure relative to atmospheric pressure. For most practical applications like tire pressure, the difference is negligible.