Browse Definitions:
Definition

pounds per square inch (PSI)

Contributor(s): Matthew Haughn

Pounds per square inch (PSI) is a measurement of pressure in the Imperial system of measurement.

PSI is commonly used to measure the pressure of gasses (pneumatic pressure) or liquids (hydraulic pressure). PSI is also used as a measure of tensile strength, defined as resistance to pulling forces, and elastic modulus strength, defined as resistance to deformation, which controls the stiffness of materials.

In pneumatic and hydraulic pressure, PSI expresses the force exerted on its containing vessel by the two relative fluids. In fluid pressure measurement, the use of PSI is generally relative to atmosphere. This is because PSI as measured by PSI gauge (PSIG) is inherently measured as a differential balance against atmospheric pressure, generally being immersed in it. PSI measurement may also be absolute: relative to a vacuum or PSI absolute (PSIA).

PSI is used to measure tensile strength in materials where thousands of PSI (Kpsi) are common and to measure elastic modulus of materials where millions of PSI (Mpsi) are common. Gauges measuring pressure are used in all manner of instrumentation for vehicles, pneumatic and hydraulic machines, as well as industrial and safety systems. In compressed air power, a PSI gauge is the equivalent to a fuel gauge.

Equivalent terms in other measurement systems are:

  • Metrics pascal (Pa) = 6.8948 xPSI.
  • Multiples of atmospheric pressure (ATM) = 6.8046 xPSI.
  • Technical atmospheres: 1 kilogram of force per centimeter squared (AT) = 7.03069 x PSI.
  • Torr, the measurement used by the inventor of the barometer = 51.71493 PSI.
  • Bar, a rounding off of atmosphere based on 100 000 Pa = 6.8948 x PSI.

Real Tool Reviews on static versus working PSI:

This was last updated in January 2017

Continue Reading About pounds per square inch (PSI)

Join the conversation

1 comment

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

How do you calculate pounds per inch (PSI) in the data center?
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • PCAOB (Public Company Accounting Oversight Board)

    The Public Company Accounting Oversight Board (PCAOB) is a Congressionally-established nonprofit that assesses audits of public ...

  • cyborg anthropologist

    A cyborg anthropologist is an individual who studies the interaction between humans and technology, observing how technology can ...

  • RegTech

    RegTech, or regulatory technology, is a term used to describe technology that is used to help streamline the process of ...

SearchSecurity

  • email spam

    Email spam, or junk email, is unsolicited bulk messages sent through email with commercial, fraudulent or malicious intent.

  • distributed denial of service (DDoS) attack

    A distributed denial-of-service attack occurs when an attack originates from multiple computers or devices, usually from multiple...

  • application whitelisting

    Application whitelisting is the practice of identifying applications that have been deemed safe for execution and restricting all...

SearchHealthIT

  • national provider identifier (NPI)

    A national provider identifier (NPI) is a unique ten-digit identification number required by HIPAA for covered healthcare ...

  • athenahealth Inc.

    Based in Watertown, Mass., athenahealth Inc. is a leading vendor of cloud-based EHRs for small to medium-sized physician ...

  • Affordable Care Act (ACA or Obamacare)

    The Affordable Care Act (ACA) is legislation passed in 2010 that changed how uninsured Americans enroll in and receive healthcare...

SearchDisasterRecovery

  • disaster recovery as a service (DRaaS)

    One approach to a strong disaster recovery plan is DRaaS, where companies offload data replication and restoration ...

  • data recovery

    Data recovery restores data that has been lost, accidentally deleted, corrupted or made inaccessible. Learn how data recovery ...

  • disaster recovery plan (DRP)

    A company's disaster recovery policy is enhanced with a documented DR plan that formulates strategies, and outlines preparation ...

SearchStorage

  • GlusterFS (Gluster File System)

    GlusterFS (Gluster File System) is an open source distributed file system that can scale out in building-block fashion to store ...

  • virtual memory

    Virtual memory is a memory management capability of an OS that allows a computer to compensate for physical memory shortages by ...

  • yottabyte (YB)

    A yottabyte is a measure of theoretical storage capacity and is 2 to the 80th power bytes, or, in decimal, approximately 1,000 ...

SearchSolidStateStorage

  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

  • SSD caching

    SSD caching, also known as flash caching, is the temporary storage of data on NAND flash memory chips in a solid-state drive so ...

  • NVDIMM (Non-Volatile Dual In-line Memory Module)

    An NVDIMM (non-volatile dual in-line memory module) is hybrid computer memory that retains data during a service outage.

SearchCloudStorage

  • RESTful API

    A RESTful application program interface breaks down a transaction to create a series of small modules, each of which addresses an...

  • cloud storage infrastructure

    Cloud storage infrastructure is the hardware and software framework that supports the computing requirements of a private or ...

  • Zadara VPSA and ZIOS

    Zadara Storage provides block, file or object storage with varying levels of compute and capacity through its ZIOS and VPSA ...

Close