Pressure Conversions

Our online conversion calculators, formulas, and examples provide a quick and easy way to perform Pressure conversions between the International System of Units (SI).

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Atmosphere (atm)
Bar (bar)
Kilopascal (kPa)
Megapascal (MPa)
Millimeters of mercury (mmHg)
Pascal (Pa)
Pounds per square inch (psi)
Torr (Torr)

Unit Summary

This table provides a summary of the Pressure units within their respective measurement systems.

Unit	Symbol	Measurement System	Description
pascal	Pa	International System of Units (SI)	base unit
kilopascal	kPa	International System of Units (SI)	1 kPa = 1,000 Pa
megapascal	MPa	International System of Units (SI)	1 MPa = 1,000,000 Pa
atmosphere	atm	Non-SI (International)	1 atm = 101,325 Pa
pounds per square inch	psi or lbf/in²	Non-SI (International)	1 psi = 6,894.757 Pa
millimeters of mercury	mmHg	Non-SI (International)	1 mmHg = 133.3224 Pa
bar	bar	Non-SI (International)	1 bar = 100,000 Pa
torr	Torr	Non-SI (International)	1 Torr = 133.3224 Pa

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Pressure Conversions

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Unit Summary

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