psi to Inches of Water Conversion

This pressure converter translates values between psi, inches of water, and pascals for low-pressure, HVAC, and fluid applications.

Formula notes

Convert the input to pascals with the selected unit factor, then scale: psi = Pa / 6894.75908677537 and inH2O = Pa / 248.83978450474663.

Worked examples

1. Example: 2 psi equals about 13,789.52 Pa and 55.42 inches of water.
2. 2 psi equals about 13,789.52 Pa and 55.42 inches of water at standard conditions.

How to use it

1. Enter a nonnegative pressure value.
2. Choose the unit of the value you entered.
3. Read psi, inches of water, and pascals together.

Frequently asked questions

Limits and interpretation

• The inch-of-water output assumes standard water density and gravity; temperature, altitude, and fluid density change the physical pressure.
• The tool is a unit conversion and does not interpret gauge, absolute, or vacuum references.

References

• NIST Special Publication 811: SI unit use and conversion