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Q:

# What does KSI measure?

A:

KSI measures pressure and stress; it stands for kilopounds per square inch or one thousand units of pounds per square inch. It is chiefly used to express the relative pressure to vacuum as compared to atmospheric pressure.

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KSI is almost exclusively used in the fields of engineering and architecture to measure large amounts of stress on materials; it may also be used to represent tensile strength. In all cases, KSI refers to pressure from tangible, physical objects. Engineers will sometimes use KSI in place of "pounds per square inch" when communicating with engineers in other parts of the world, as it does not require converting between the metric and imperial systems.

## Related Questions

• A:

Pounds per square inch cannot be converted to ft-lbs because psi is a measurement of pressure, whereas ft-lbs is a measurement of total energy. Neither one is in the International System of Units as a primary form of measurement. Psi and ft-lbs are primarily American and British units of measure.

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• A:

To calculate the pounds per square inch (psi) from the compression ratio, one needs the compression ratio and the atmospheric pressure measurement. Then, the first number in the compression ratio is multiplied by the atmospheric pressure, then divided by the second number in the ratio.

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• A:

One inch of water, as measured using a pressure gauge at four degrees Celsius, is equivalent to 0.036127291827 pounds per square inch (PSI). This conversion can be found at OnlineConversion.com.