Inches of Water to Pounds per Square Inch (inH₂O → psi)
Formula
1 inH₂O = 0.036126291325423075 psiConversion Table
| inH₂O | psi |
|---|---|
| 0 | 0 |
| 1.0000 | 0.036126 |
| 2.0000 | 0.072253 |
| 3.0000 | 0.10838 |
| 4.0000 | 0.14451 |
| 5.0000 | 0.18063 |
| 6.0000 | 0.21676 |
| 7.0000 | 0.25288 |
| 8.0000 | 0.28901 |
| 9.0000 | 0.32514 |
| 10.000 | 0.36126 |
| 11.000 | 0.39739 |
| 12.000 | 0.43352 |
| 13.000 | 0.46964 |
| 14.000 | 0.50577 |
| 15.000 | 0.54189 |
| 16.000 | 0.57802 |
| 17.000 | 0.61415 |
| 18.000 | 0.65027 |
| 19.000 | 0.68640 |
| inH₂O | psi |
|---|---|
| 20.000 | 0.72253 |
| 21.000 | 0.75865 |
| 22.000 | 0.79478 |
| 23.000 | 0.83090 |
| 24.000 | 0.86703 |
| 25.000 | 0.90316 |
| 26.000 | 0.93928 |
| 27.000 | 0.97541 |
| 28.000 | 1.0115 |
| 29.000 | 1.0477 |
| 30.000 | 1.0838 |
| 31.000 | 1.1199 |
| 32.000 | 1.1560 |
| 33.000 | 1.1922 |
| 34.000 | 1.2283 |
| 35.000 | 1.2644 |
| 36.000 | 1.3005 |
| 37.000 | 1.3367 |
| 38.000 | 1.3728 |
| 39.000 | 1.4089 |
| inH₂O | psi |
|---|---|
| 40.000 | 1.4451 |
| 41.000 | 1.4812 |
| 42.000 | 1.5173 |
| 43.000 | 1.5534 |
| 44.000 | 1.5896 |
| 45.000 | 1.6257 |
| 46.000 | 1.6618 |
| 47.000 | 1.6979 |
| 48.000 | 1.7341 |
| 49.000 | 1.7702 |
| 50.000 | 1.8063 |
| 51.000 | 1.8424 |
| 52.000 | 1.8786 |
| 53.000 | 1.9147 |
| 54.000 | 1.9508 |
| 55.000 | 1.9869 |
| 56.000 | 2.0231 |
| 57.000 | 2.0592 |
| 58.000 | 2.0953 |
| 59.000 | 2.1315 |
| inH₂O | psi |
|---|---|
| 60.000 | 2.1676 |
| 61.000 | 2.2037 |
| 62.000 | 2.2398 |
| 63.000 | 2.2760 |
| 64.000 | 2.3121 |
| 65.000 | 2.3482 |
| 66.000 | 2.3843 |
| 67.000 | 2.4205 |
| 68.000 | 2.4566 |
| 69.000 | 2.4927 |
| 70.000 | 2.5288 |
| 71.000 | 2.5650 |
| 72.000 | 2.6011 |
| 73.000 | 2.6372 |
| 74.000 | 2.6733 |
| 75.000 | 2.7095 |
| 76.000 | 2.7456 |
| 77.000 | 2.7817 |
| 78.000 | 2.8179 |
| 79.000 | 2.8540 |
Inches of Water to Pounds per Square Inch Conversion
Converting Inches of Water (inH₂O) to Pounds per Square Inch (psi) is a common pressure conversion. 1 inH₂O equals 0.036126 psi. For example, 100 inH₂O is equal to 3.612629 psi.
Quick Reference Values
1 inH₂O = 0.036126 psi. 5 inH₂O = 0.180631 psi. 10 inH₂O = 0.361263 psi. 25 inH₂O = 0.903157 psi. 50 inH₂O = 1.806315 psi. 100 inH₂O = 3.612629 psi.
What is Inches of Water?
Inches of Water (inH₂O) is a unit of pressure. Inches of water measure pressure as the height in inches of a water column. One inch of water equals 249.0889 pascals (Pa) at 4 °C. This unit is widely used to measure low-pressure differentials in HVAC and fluid systems [nist-si-guide]. The use of water columns for pressure measurement dates to early fluid mechanics studies. The inch unit was adopted in English-speaking countries for practical low-pressure measurement. It remains standardized for building and industrial applications [nist-si-guide]. Inches of water are used primarily in the United States for HVAC duct pressures, gas pressure measurements, and cleanroom environments. Other countries often use pascals or millimeters of water but recognize inH2O in specific sectors [nist-si-guide].
What is Pounds per Square Inch?
Pounds per Square Inch (psi) is a unit of pressure. Pounds per square inch (psi) measures pressure as force in pounds applied over one square inch of area. It is defined as 1 psi = 6,894.76 pascals in the SI unit system [nist-si-guide]. Psi originated in English-speaking countries for engineering and industrial applications during the 19th century, formalized through American standards for pressure measurement [nist-si-guide]. Psi remains common in the United States, Canada, and the UK for tire pressure, hydraulic systems, and HVAC industries. It is also referenced in international engineering standards [nist-sp-811].
Common Misspellings
People often search for this conversion using these alternate spellings: inch of water, inch-water, in h2o, inch h20, pounds per square inch, pound per sq inch, psiin. All of these refer to the Inches of Water to Pounds per Square Inch conversion.