Download and print Vacuum Units Converter Chart
The % of vacuum is a relative value where pressure at normal or standard atmosphere is the base value.
pv% = 100% - (pv / patm) 100% (1)
pv% = vacuum (%)
pv = absolute pressure (psia, kPa, bar ..)
patm = absolute presure at normal or standard conditions (psia, kPa, bar ..)
The vacuum with absolute pressure 4 kPa and standard pressure 101.4 kPa can be calculated as
pv% = 100% - ((4 kPa) / (101.4 kPa)) 100%
= 96.1 %
The vacuum with absolute pressure 0.1 bar and standard pressure 1 bar can be calculated as
pv% = 100% - ((0.1 bar) / (1 bar)) 100%
= 90 %
|Low vacuum||1x105 to 3x103|
|Medium vacuum||3x103 to 1x10-1|
|High vacuum||1x10-1 to 1x10-7|
|Ultra high vacuum||1x10-7 to 1x10-10|
|Extremely high vacuum||1x10-10|
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