PSI to Bar Converter
Convert pressure between pounds per square inch (PSI) and bar instantly
Pressure Conversion
Pounds per square inch (avoirdupois)
Metric pressure unit (10⁵ pascals)
Conversion Formula
PSI to Bar: bar = PSI ÷ 14.50377
Bar to PSI: PSI = bar × 14.50377
Conversion factor: 1 bar = 14.50377 PSI
Common PSI to Bar Conversions
| PSI | Bar | Common Use |
|---|---|---|
| 14.50 | 1.00 | Standard atmospheric pressure |
| 29.00 | 2.00 | Bicycle tires (low pressure) |
| 32.00 | 2.21 | Car tires (typical) |
| 50.00 | 3.45 | Road bicycle tires |
| 100.00 | 6.89 | Industrial compressor |
| 232.00 | 16.00 | Hydraulic systems |
| 1,450.38 | 100.00 | High-pressure systems |
Example Calculations
Example 1: Convert 45 bar to PSI
Given: Pressure = 45 bar
Formula: PSI = bar × 14.50377
Calculation: PSI = 45 × 14.50377 = 652.66965
Result: 45 bar ≈ 652.67 PSI
Example 2: Convert 232 PSI to bar
Given: Pressure = 232 PSI
Formula: bar = PSI ÷ 14.50377
Calculation: bar = 232 ÷ 14.50377 = 15.99584
Result: 232 PSI ≈ 15.996 bar
Quick Reference
1 PSI
= 0.0689476 bar
1 bar
= 14.50377 PSI
1 bar
= 100,000 Pascals
1 atmosphere
= 14.696 PSI ≈ 1.013 bar
Practical Applications
Tire pressure measurement
Hydraulic systems
Pneumatic tools
HVAC systems
Scuba diving equipment
Industrial machinery
Understanding PSI and Bar
What is PSI?
PSI stands for Pounds per Square Inch. It's a unit of pressure based on the avoirdupois pound-force. One PSI is the pressure caused by one pound-force of force acting on a one-square-inch surface area. PSI is commonly used in the United States and other countries using imperial units.
Common PSI Applications
- •Automotive tire pressure (typically 30-35 PSI)
- •Air compressors (100-150 PSI)
- •Bicycle tires (30-100 PSI depending on type)
- •Water pressure in homes (40-80 PSI)
What is Bar?
A bar is a metric pressure unit equal to 100,000 pascals (10⁵ Pa). While not officially part of the SI unit system, bar is widely used worldwide, especially in Europe and for scientific applications. One bar is approximately equal to atmospheric pressure at sea level.
Common Bar Applications
- •European tire pressure specifications
- •Scuba diving (pressure at depth)
- •Weather forecasting (millibars)
- •Engineering and manufacturing
Conversion Factor Explained
The conversion factor between PSI and bar is 14.50377. This means:
- →1 bar = 14.50377 PSI (multiply bar by 14.50377 to get PSI)
- →1 PSI = 0.0689476 bar (divide PSI by 14.50377 to get bar)
Important Notes
- ⚠️Always verify the correct pressure unit for your application
- ⚠️PSI and bar are absolute pressure units (not gauge pressure)
- ⚠️Gauge pressure (PSIG) measures relative to atmospheric pressure
- ⚠️Over-inflation can be dangerous in tires and pressure vessels