Vaisala HMP230 - Manual (Page 161)

HMP230 Transmitter
Appendix 10
155
PRESSURE UNIT CONVERSION CHART
Multiplication factors
NOTE: conversions from mmHg and inHg are defined at 0°C and for mmH
2
O
and inH
2
O at 4°C.
FROM: TO:
hPa/mbar
PaN/m 2 0.01
mmHg torr 1.333224
inHg 33.86388
mmH
2
O 0.09806650
inH
2
O 2.490889
atm 1013.25
at 980.665
bar 1000
psi 68.94757
psia = psi absolute
Example: 29.9213 inHg = 29.9213 x 33.86388 = 1013.25 hPa/mbar