Pressure Conversions

Unit Conversions

Abbreviations

atm - atmosphere
mm Hg - millimeters of mercury
torr = mm Hg
Pa - Pascal (kPa = kilo Pascal
^oC - degrees Celsius
^oK - degrees Kelvin

Conversions

^oK = ^oC + 273
1 cm³ = 1 mL (milliliter)
1dm³(cubic decimeter) = 1 L = 1000 mL
0.00 ^oC = 273 ^oK
1.00 atm = 760.0 mm Hg = 1.01.325 kPa

Standard conditions

0.00^oC = 273^oK
1 atm = 760.0 mmHg = 101.325 kPa = 101,325 Pa

Example conversions:
- Between atm and mmHg
  - Conversion of 0.92 atm to mmHg--
    - multiply the atm value by 760 mmHg/atm or [0.92atm x 760.0 mmHg/atm]; the atm units cancel leaving mmHg
  - Conversion of 735.5 mmHg to atm--
    - divide the mmHg value by 760 mmHg / atm or [735.5 mmHg / (760 mmHg/atm)]
- Between atm and kPa
  - Recalling that 1 atm = 101.324 kPa, convert 0.934 atm to kPa--
    - multiply the atm value by 101.324 kPa / atm or 0.934 atm x 101.325 kPa/atm
  - Recalling that 1 atm = 101.324 kPa, convert 93.45 kPa to atm--
    - divide the kPa value by 101.325 kPa / atm or 93.45 kPa/ 101.325 kPa / atm
- Between mmHg and kPa
  - Recalling that 760.0 mmHg = 101.325 kPa, convert 730 mmHg to kPa--
    - 730 mmHg x (101.325 kPa / 760 mmHg); the mmHg units cancel resulting in kPa as the final unit
  - Recalling that 760.0 mmHg = 101.325 kPa, convert 98.234 kPa to mmHg---
    - 98.234 kPa x (760 mmHg/101.325 kPa)