PSI to Bar Converter
Convert pressure values between PSI (pounds per square inch) and Bar instantly. Enter a value in either field below and the converter will update automatically — no need to press a button.
What is PSI?
PSI (pounds per square inch) is a unit of pressure widely used in the United States and other countries that follow the imperial system. It measures the amount of force applied over one square inch of area. PSI is commonly used for tire pressure, hydraulic systems, water pressure, and industrial equipment ratings.
What is Bar?
Bar is a metric unit of pressure, roughly equal to atmospheric pressure at sea level. It is used across Europe, most of Asia, and in scientific and engineering contexts worldwide. One bar is defined as exactly 100,000 pascals.
PSI to Bar Formula
To convert PSI to Bar, multiply the PSI value by 0.0689476:
To convert Bar back to PSI, divide by the same factor:
Common Uses
- Car and bike tire pressure (typically 28–35 PSI, or ~2–2.4 bar)
- Home water pressure systems
- Compressed air tools and equipment
- Scuba diving tanks and regulators
- Industrial hydraulic and pneumatic systems
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Frequently Asked Questions
Is 1 bar equal to 1 atmosphere?
Almost. 1 bar equals 0.9869 atmospheres, so the two are very close but not exactly identical.
What is 32 PSI in Bar?
32 PSI is approximately 2.21 bar — a typical passenger car tire pressure.
Why do some countries use PSI and others use Bar?
PSI comes from the imperial measurement system, used mainly in the US, while Bar is part of the metric system used across most of the world, including Europe and Asia.