If you're measuring pressure at an ambient temperature, you might want to check one of these units:
https://www.convertunits.com/info/inch+of+air+[15+%C2%B0C]
https://www.convertunits.com/info/foot+of+air+[15+%C2%B0C]
https://www.convertunits.com/info/meter+of+air+[15+%C2%B0C]
These are all at 15 degrees Celsius. Room temperature is typically 20-25 deg C so it should give you a good estimate.
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| 12/02/2010, 1:03 PM | MM OF MERCURY TO PSIG AT 20 C |
| 12/06/2010, 3:05 PM | Re: MM OF MERCURY TO PSIG AT 20 C |