- We try to ensure accuracy, but always check latest data from NIST
- Requires JavaScript to be functioning in your browser
- Enter a numerical value into the first box
- Choose the pressure unit from the second dropdown box
- Choose the pressure unit that you want to convert to from the third box
- Click the Convert button to get the answer
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For units using columns of liquid, the most common reference temperatures are:
- Metric column of H2O @ 4°C the temperature at which water has maximum density
- Inches column of H2O @ 20°C
- Column of Mercury (Hg) @ 0°C
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