Psi to Bar Converter
Convert psito bar between units instantly. Includes conversion tables, common equivalents, and calculation formulas. Enter your values for instant results.
Formula
Bar = PSI x 0.0689476
Multiply PSI by 0.0689476 to get bar. To convert bar to PSI, divide by 0.0689476 (or multiply by 14.5038). One bar equals exactly 100,000 pascals. For kPa, multiply PSI by 6.89476. For atmospheres, divide PSI by 14.696.
Frequently Asked Questions
What is the conversion factor from PSI to bar?
One PSI equals 0.0689476 bar, and one bar equals 14.5038 PSI. This conversion is derived from the definitions: one PSI is one pound-force per square inch (6894.76 Pa), and one bar is exactly 100,000 Pa. Dividing 6894.76 by 100,000 gives 0.0689476 bar per PSI. This conversion is used extensively in automotive, industrial, and diving applications where pressure specifications cross between American and European standards.
Where is PSI used versus bar?
PSI (pounds per square inch) is the primary pressure unit in the United States, used for tire pressure, water systems, HVAC, hydraulics, and compressed air. Bar is the standard in most of Europe, Asia, and internationally, used for tire pressure, industrial systems, and scuba diving. Many modern pressure gauges display both units. Automotive tire sidewalls often show both PSI and bar (or kPa) ratings. The international trend is moving toward bar and pascal, but PSI remains dominant in American industry.
How do PSI and bar relate to atmospheric pressure?
Standard atmospheric pressure at sea level is 14.696 PSI or 1.01325 bar. This means one bar is very close to one atmosphere, which makes bar a convenient unit since many applications operate near atmospheric pressure. A car tire at 32 PSI has about 2.21 bar of gauge pressure, or 3.22 bar absolute (adding atmospheric pressure). Weather stations report atmospheric pressure in hectopascals (millibars), typically ranging from 950 to 1050 mbar as weather systems pass through.
What PSI and bar values are typical for common applications?
Car tires typically run 30-35 PSI (2.07-2.41 bar). Bicycle road tires use 80-130 PSI (5.5-9.0 bar). Home water pressure is usually 40-80 PSI (2.8-5.5 bar). Scuba tanks are filled to 3000 PSI (207 bar). Industrial hydraulic systems operate at 1500-5000 PSI (103-345 bar). Pressure washers range from 1000-4000 PSI (69-276 bar). Compressed air lines typically run at 90-120 PSI (6.2-8.3 bar). These ranges help verify that your conversions are reasonable.
Can I use Psi to Bar Converter on a mobile device?
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Is Psi to Bar Converter free to use?
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