Vaisala PTB220 User Manual download pdf (Page 113)

APPENDIX M ________________________________________________ PRESSURE CONVERSION CHART

VAISALA ________________________________________________________________________ 107

APPENDIX M PRESSURE CONVERSION CHART

Pressure conversion chart

Multiplication factors

Note: conversions for mmHg and inHg are defined at 0°C temperature and for mmH2O and inH2O at 4°C temperature.

psia =

FROM

psi absolute

hPa Pa mmHg inHg mmH2O inH2O atm at bar psi

mbar N/m2 torr

hPa

mbar

1 0.01 1.333224 33.86388 0.09806650 2.490889 1013.25 980.665 1000 68.94757

Nm2

100 1 133.3224 3386.388 9.806650 249.0889 101325 98066.5 100000 6894.757

mmHg

torr

0.7500617 0.0075006 1 25.40000 0.07355592 1.8683 760 735.559 750.0617 51.71493

inHg

0.02952999 0.00029530 0.03937008 1 0.002895903 0.073556 29.921 28.959 29.52999 2.036021

mmH2O

10.19716 0.1019716 13.59510 345.3155 1 25.40000 10332.3 10000 10197.16 703.0696

inH2O

0.40147 0.0040147 0.53525 13.596 0.039372 1 406.79 393.71 401.463 27.6799

atm

0.00098692 0.000009869 0.00131579 0.033422 0.000096788 0.0024583 1 0.967841 0.98692 0.068046

0.0010197 0.00001020 0.0013595 0.034532 0.0001 0.0025399 1.03323 1 1.01972 0.070307

bar

0.001 0.00001 0.001333224 0.03386388 0.00009807 0.0024909 1.01325 0.980665 1 0.06894757

psi

0.01450377 0.00014504 0.01933678 0.4911541 0.001422334 0.036127 14.6962 14.2233 14.50377 1

Example

1013.25 hPa/mbar = 1013.25 x 0.02952999 inHg = 29.9213 inHg

1 2 ... 108 109 110 111 112 113

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Vaisala PTB220 User Manual Page 113