Inches of Water to Bars (inH₂O → bar)
Formula
1 inH₂O = 0.00249082 barConversion Table
| inH₂O | bar |
|---|---|
| 0 | 0 |
| 1.0000 | 0.0024908 |
| 2.0000 | 0.0049816 |
| 3.0000 | 0.0074725 |
| 4.0000 | 0.0099633 |
| 5.0000 | 0.012454 |
| 6.0000 | 0.014945 |
| 7.0000 | 0.017436 |
| 8.0000 | 0.019927 |
| 9.0000 | 0.022417 |
| 10.000 | 0.024908 |
| 11.000 | 0.027399 |
| 12.000 | 0.029890 |
| 13.000 | 0.032381 |
| 14.000 | 0.034871 |
| 15.000 | 0.037362 |
| 16.000 | 0.039853 |
| 17.000 | 0.042344 |
| 18.000 | 0.044835 |
| 19.000 | 0.047326 |
| inH₂O | bar |
|---|---|
| 20.000 | 0.049816 |
| 21.000 | 0.052307 |
| 22.000 | 0.054798 |
| 23.000 | 0.057289 |
| 24.000 | 0.059780 |
| 25.000 | 0.062270 |
| 26.000 | 0.064761 |
| 27.000 | 0.067252 |
| 28.000 | 0.069743 |
| 29.000 | 0.072234 |
| 30.000 | 0.074725 |
| 31.000 | 0.077215 |
| 32.000 | 0.079706 |
| 33.000 | 0.082197 |
| 34.000 | 0.084688 |
| 35.000 | 0.087179 |
| 36.000 | 0.089670 |
| 37.000 | 0.092160 |
| 38.000 | 0.094651 |
| 39.000 | 0.097142 |
| inH₂O | bar |
|---|---|
| 40.000 | 0.099633 |
| 41.000 | 0.10212 |
| 42.000 | 0.10461 |
| 43.000 | 0.10711 |
| 44.000 | 0.10960 |
| 45.000 | 0.11209 |
| 46.000 | 0.11458 |
| 47.000 | 0.11707 |
| 48.000 | 0.11956 |
| 49.000 | 0.12205 |
| 50.000 | 0.12454 |
| 51.000 | 0.12703 |
| 52.000 | 0.12952 |
| 53.000 | 0.13201 |
| 54.000 | 0.13450 |
| 55.000 | 0.13700 |
| 56.000 | 0.13949 |
| 57.000 | 0.14198 |
| 58.000 | 0.14447 |
| 59.000 | 0.14696 |
| inH₂O | bar |
|---|---|
| 60.000 | 0.14945 |
| 61.000 | 0.15194 |
| 62.000 | 0.15443 |
| 63.000 | 0.15692 |
| 64.000 | 0.15941 |
| 65.000 | 0.16190 |
| 66.000 | 0.16439 |
| 67.000 | 0.16688 |
| 68.000 | 0.16938 |
| 69.000 | 0.17187 |
| 70.000 | 0.17436 |
| 71.000 | 0.17685 |
| 72.000 | 0.17934 |
| 73.000 | 0.18183 |
| 74.000 | 0.18432 |
| 75.000 | 0.18681 |
| 76.000 | 0.18930 |
| 77.000 | 0.19179 |
| 78.000 | 0.19428 |
| 79.000 | 0.19677 |
Inches of Water to Bars Conversion
Converting Inches of Water (inH₂O) to Bars (bar) is a common pressure conversion. 1 inH₂O equals 0.002491 bar. For example, 100 inH₂O is equal to 0.249082 bar.
Quick Reference Values
1 inH₂O = 0.002491 bar. 5 inH₂O = 0.012454 bar. 10 inH₂O = 0.024908 bar. 25 inH₂O = 0.062271 bar. 50 inH₂O = 0.124541 bar. 100 inH₂O = 0.249082 bar.
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 Bars?
Bars (bar) is a unit of pressure. The bar is a unit of pressure equal to exactly 100,000 pascals (Pa). It is used to measure pressure or stress and is slightly less than the standard atmospheric pressure of 101,325 Pa. The bar is not an SI unit but is accepted for use with SI by the BIPM due to its convenience in many engineering fields [bipm-si-brochure]. The bar was introduced by the Norwegian meteorologist Vilhelm Bjerknes in 1909 to simplify atmospheric pressure measurements. It gained wider recognition in the mid-20th century and was formally accepted for use with the SI by the BIPM to provide a practical unit for pressure [bipm-si-brochure]. The bar is widely used in meteorology, engineering, and automotive industries worldwide, especially in Europe and Asia. It remains common in barometric pressure readings and tire pressure specifications, although the pascal is the SI base unit [bipm-si-brochure].
Common Misspellings
People often search for this conversion using these alternate spellings: inch of water, inch-water, in h2o, inch h20, barres, barre, bars pressure. All of these refer to the Inches of Water to Bars conversion.