Pounds per Square Inch
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Imperial pressure unit
About Pounds per Square Inch (psi)
Pounds per square inch is the most common pressure unit in the United States, used for tire pressure (typically 30-35 psi for passenger cars), air compressor ratings, and water pressure in plumbing. Fire hydrants deliver water at 40-80 psi, and scuba tank pressures reach 3,000 psi.
- Category
- Pressure
- Symbol
- psi
- Also known as
- PSI lb/in² lbf/in²
CONVERT TO
Frequently Asked Questions
What is a Pounds per Square Inch (psi)?
Imperial pressure unit
How many Bar (bar) are in one Pounds per Square Inch (psi)?
One Pounds per Square Inch (psi) equals 0.068948 Bar (bar).
How many Atmosphere (atm) are in one Pounds per Square Inch (psi)?
One Pounds per Square Inch (psi) equals 0.068046 Atmosphere (atm).
How many Pascal (Pa) are in one Pounds per Square Inch (psi)?
One Pounds per Square Inch (psi) equals 6,894.76 Pascal (Pa).
How do I convert Pounds per Square Inch to Bar?
To convert Pounds per Square Inch to Bar, multiply the value by 0.068948 (1 psi = 0.068948 bar).