International vacuum/pressure conversion table

Unit bar N/cm² kPa atm, kp/cm² m H₂O torr, mm Hg in Hg psi
bar 1 10 100 1.0197 1.0197 750.06 29.54 14.5
N/cm² 0.1 1 10 0.1019 0.1019 75.006 2.954 1.45
kPa 0.01 0.1 1 0.0102 0.0102 7.5006 0.2954 0.145
atm, kp/cm² 0.9807 9.807 98.07 1 1 735.56 28.97 14.22
m H₂O 0.9807 9.807 98.07 1 1 735.56 28.97 14.22
torr, mm Hg 0.00133 0.01333 0.1333 0.00136 0.00136 1 0.0394 0.0193
in Hg 0.0338 0.3385 3.885 0.03446 0.03446 25.35 1 0.49
psi 0.0689 0.6896 6.896 0.0703 0.0703 51.68 2.035 1

International vacuum/pressure conversion table with absolute and relative value comparison

Relative vacuum [%] Residual pressure, absolute [bar] Pressure, relative [bar] N/cm² kPa atm, kp/cm² m H₂O torr, mm Hg in Hg
10 0.9 –0.101 –1.01 –10.1 –0.103 –0.103 –76 –3
20 0.8 –0.203 –2.03 –20.3 –0.207 –0.207 –152 –6
30 0.7 –0.304 –3.04 –30.4 –0.31 –0.31 –228 –9
40 0.6 –0.405 –4.05 –40.5 –0.413 –0.413 –304 –12
50 0.5 –0.507 –5.07 –50.7 –0.517 –0.517 –380 –15
60 0.4 –0.608 –6.08 –60.8 –0.62 –0.62 –456 –18
70 0.3 –0.709 –7.09 –70.9 –0.723 –0.723 –532 –21
80 0.2 –0.811 –8.11 –81.1 –0.827 –0.827 –608 –24
90 0.1 –0.912 –9.12 –91.2 –0.93 –0.93 –684 –27