Pressure Conversions

Pressure conversions span meteorology, mechanical engineering, medicine, scuba diving, and automotive care. Atmospheric pressure, tire pressure, blood pressure, hydraulic pressure, and vacuum levels all use different units depending on region and context. Understanding these conversions is critical for interpreting weather data, maintaining vehicles safely, and working with pneumatic and hydraulic systems.

  • ✓Converting PSI to kPa for tire pressure when traveling in metric countries
  • ✓Converting mmHg to kPa for blood pressure readings and medical equipment
  • ✓Converting bar to psi for scuba tank fills and compressed gas cylinders
  • ✓Converting atmospheres to pascals for chemistry and physics calculations

Most Popular Pressure Conversions

PSI → kPakPa → PSIBar → PSIPSI → BarAtm → PascalsmmHg → kPa

All Pressure Converters

Convert from Pascals (Pa)

Pascals → KilopascalsPascals → MegapascalsPascals → BarPascals → MillibarPascals → PSIPascals → AtmospheresPascals → TorrPascals → mmHg

Convert from Kilopascals (kPa)

Kilopascals → PascalsKilopascals → MegapascalsKilopascals → BarKilopascals → MillibarKilopascals → PSIKilopascals → AtmospheresKilopascals → TorrKilopascals → mmHg

Convert from Megapascals (MPa)

Megapascals → PascalsMegapascals → KilopascalsMegapascals → BarMegapascals → MillibarMegapascals → PSIMegapascals → AtmospheresMegapascals → TorrMegapascals → mmHg

Convert from Bar (bar)

Bar → PascalsBar → KilopascalsBar → MegapascalsBar → MillibarBar → PSIBar → AtmospheresBar → TorrBar → mmHg

Convert from Millibar (mbar)

Millibar → PascalsMillibar → KilopascalsMillibar → MegapascalsMillibar → BarMillibar → PSIMillibar → AtmospheresMillibar → TorrMillibar → mmHg

Convert from PSI (psi)

PSI → PascalsPSI → KilopascalsPSI → MegapascalsPSI → BarPSI → MillibarPSI → AtmospheresPSI → TorrPSI → mmHg

Convert from Atmospheres (atm)

Atmospheres → PascalsAtmospheres → KilopascalsAtmospheres → MegapascalsAtmospheres → BarAtmospheres → MillibarAtmospheres → PSIAtmospheres → TorrAtmospheres → mmHg

Convert from Torr (Torr)

Torr → PascalsTorr → KilopascalsTorr → MegapascalsTorr → BarTorr → MillibarTorr → PSITorr → AtmospheresTorr → mmHg

Convert from mmHg (mmHg)

mmHg → PascalsmmHg → KilopascalsmmHg → MegapascalsmmHg → BarmmHg → MillibarmmHg → PSImmHg → AtmospheresmmHg → Torr

Frequently Asked Questions — Pressure

What is standard atmospheric pressure in different units?
Standard atmospheric pressure at sea level is: 101,325 Pa, 101.325 kPa, 1 atm, 14.696 psi, 1013.25 mbar, or 760 mmHg. This is the baseline reference used in chemistry, physics, and aviation.
What tire pressure should I use — PSI or kPa?
Most car tires require 30–35 PSI (207–241 kPa). Your vehicle's recommended tire pressure appears on a sticker inside the driver's door jamb or in the owner's manual. Use PSI for US gauges or kPa for metric gauges — both measure the same thing.
What is normal blood pressure in mmHg, and what does it equal in kPa?
Normal blood pressure is below 120/80 mmHg (systolic/diastolic), which equals approximately 16/10.7 kPa. Blood pressure is measured in mmHg in most clinical settings worldwide because this unit was established when mercury manometers were standard.

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