Definition:SI/Pressure
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Definition
Various SI units of pressure which have specific names are as follows:
Pascal
The pascal is the SI unit of pressure.
It is defined as being:
- The amount of pressure required to apply a force of $1$ newton over an area of $1$ square metre
| \(\ds \) | \(\) | \(\ds 1\) | pascal | |||||||||||
| \(\ds \) | \(=\) | \(\ds 1\) | newton per square metre | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10\) | barye (dynes per square centimetre) | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^{-6}\) | megapascal | |||||||||||
| \(\ds \) | \(\approx\) | \(\ds 1 \cdotp 450377 \times 10^{-4}\) | pounds per square inch | |||||||||||
| \(\ds \) | \(\approx\) | \(\ds 2 \cdotp 089 \times 10^{-2}\) | pounds per square foot | |||||||||||
| \(\ds \) | \(\approx\) | \(\ds 9 \cdotp 869 \times 10^{-6}\) | standard atmospheres |
Megapascal
The megapascal is an SI unit of pressure.
| \(\ds \) | \(\) | \(\ds 1\) | megapascal | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10\) | bars | |||||||||||
| \(\ds \) | \(=\) | \(\ds 10^6\) | pascals | |||||||||||
| \(\ds \) | \(\approx\) | \(\ds 1 \cdotp 450377 \times 10^2\) | pounds per square inch |