PSI - Pounds per Square Inch Pressure Unit

Pounds or pound force per square inch (psi, lb/in^2, pfsi or lbf/in^2) is a widely used British and American unit of measure for pressure. 1 psi equals 6,894.76 Pascals.

In the USA the PSI pressure unit is the pimary unit of measure for pressure and almost all pressure instruments are specified and display in pounds per square inch.

The psi is still used extensively in the UK but the bar pressure unit has mostly replaced it as the primary pressure unit.

Use the following conversion factors to convert from PSI to other pressure units or vica versa. To convert a reading in PSI to another unit multiply it by the relevant pressure conversion factor. To convert a reading in any pressure unit to PSI divide it by the relevant pressure conversion factor.

Alternatively convert from a psi pressure value into another unit using the psi conversion table or the pressure unit converter.

PSI Pressure Conversion Factors

0.0689476	bar
1	psi
68.9476	mbar
6894.76	N/m²
6894.76	Pa
68.9476	hPa
6.89476	kPa
0.00689476	MPa
0.0703070	kg/cm²
703.070	mmH2O 4°C (39.2°F)
70.3070	cmH2O 4°C (39.2°F)
0.703070	mH2O 4°C (39.2°F)
27.6799	inH2O 4°C (39.2°F)
2.30666	ftH2O 4°C (39.2°F)
51.7149	mmHg 0°C (32°F)
5.17149	cmHg 0°C (32°F)
2.03602	inHg 0°C (32°F)
51.7149	Torr
51714.9	mTorr
0.0680460	atm
0.0703070	at
68947.6	dyn/cm²
16	oz/in²
51714.9	µHg 0°C (32°F)
0.000446429	tsi (uk, long)
0.000500000	tsi (usa, short)
0.0720000	tsf (usa, short)
144.000	psf
70.3070	g/cm²

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Site Last Updated: 03/09/10

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