How do I convert inches of water to PSI?

How do I convert inches of water to PSI?

To convert WC (Inches of Water) to PSI, there are two simple formulas that can be used. The two options are to use division or multiplication. The conversion factors used are vastly different.

Water columns create a pressure at the base of the column. The higher the column of water, the greater the pressure. One pound per square inch (PSI) is equivalent to having a column of water 2.31 feet in height. The pressure at the base of that column of water would be 1 PSI. As it turns out, 27.72 inches is equivalent to 2.31 feet. So, if we had a column of water 27.72 inches (or 2.31 feet) we would have a pressure of 1 PSI at the base of that column.

Option #1

Take your WC measurement and divide it by 27.7076 to get the measurement in PSI.

For example, if you divide 1 WC by 27.7076, it converts to 0.0360912 PSI.

Example 2: If you divide 100 WC by 27.7076, it converts to 3.60912 PSI.

Option #2

You can also convert by multiplying the WC measurement by 0.0360912.

For example, if you multiply 1 WC by 0.0360912 PSI, it converts to 0.0360912 PSI.

Example 2, if you multiply 100 WC by 0.0360912 PSI, it converts to 3.60912 PSI.

How do I convert PSI to Inches of Water?

On the other side, to convert PSI to inches of water (WC), simply multiply the pressure value (PSI) by 27.7076. to get the measurement in WC.

For example, if you multiply 1 PSI by 27.7076, it converts to 27.7076 WC.

Example 2: If you multiply 10 PSI by 27.7076, it converts to 277.076 WC.

Below is a chart with the conversion for the various pressure ranges we carry in "LOW PRESSURE" gauges.