Pound force per square inch
Abbreviation/Symbol:
- psi
- lb/in2
- lbf/in2
- lbf/sq in
Unit of:
- Pressure
Worldwide use:
- psi is commonly used worldwide, eg to measure car and bike tire pressure, SCUBA diving equipment, and domestic plumbing
Definition:
1 psi is the pressure exterted by one pound-force of force being applied to an area of one square inch
Common references:
- 50 psi is the typical pressure of water leaving a garden hose, 162 psi is the average pressure of a human bite. An aluminium SCUBA tank is typically pressurised to 3,000 psi
Usage context:
In widespread worldwide use - eg measuring tire pressures, SCUBA diving equipment pressue, and in domestic plumbing