Inches of Water to Kilopascals (inH₂O → kPa)
Formula
1 inH₂O = 0.249082 kPaConversion Table
| inH₂O | kPa |
|---|---|
| 0 | 0 |
| 1.0000 | 0.24908 |
| 2.0000 | 0.49816 |
| 3.0000 | 0.74725 |
| 4.0000 | 0.99633 |
| 5.0000 | 1.2454 |
| 6.0000 | 1.4945 |
| 7.0000 | 1.7436 |
| 8.0000 | 1.9927 |
| 9.0000 | 2.2417 |
| 10.000 | 2.4908 |
| 11.000 | 2.7399 |
| 12.000 | 2.9890 |
| 13.000 | 3.2381 |
| 14.000 | 3.4871 |
| 15.000 | 3.7362 |
| 16.000 | 3.9853 |
| 17.000 | 4.2344 |
| 18.000 | 4.4835 |
| 19.000 | 4.7326 |
| inH₂O | kPa |
|---|---|
| 20.000 | 4.9816 |
| 21.000 | 5.2307 |
| 22.000 | 5.4798 |
| 23.000 | 5.7289 |
| 24.000 | 5.9780 |
| 25.000 | 6.2271 |
| 26.000 | 6.4761 |
| 27.000 | 6.7252 |
| 28.000 | 6.9743 |
| 29.000 | 7.2234 |
| 30.000 | 7.4725 |
| 31.000 | 7.7215 |
| 32.000 | 7.9706 |
| 33.000 | 8.2197 |
| 34.000 | 8.4688 |
| 35.000 | 8.7179 |
| 36.000 | 8.9670 |
| 37.000 | 9.2160 |
| 38.000 | 9.4651 |
| 39.000 | 9.7142 |
| inH₂O | kPa |
|---|---|
| 40.000 | 9.9633 |
| 41.000 | 10.212 |
| 42.000 | 10.461 |
| 43.000 | 10.711 |
| 44.000 | 10.960 |
| 45.000 | 11.209 |
| 46.000 | 11.458 |
| 47.000 | 11.707 |
| 48.000 | 11.956 |
| 49.000 | 12.205 |
| 50.000 | 12.454 |
| 51.000 | 12.703 |
| 52.000 | 12.952 |
| 53.000 | 13.201 |
| 54.000 | 13.450 |
| 55.000 | 13.700 |
| 56.000 | 13.949 |
| 57.000 | 14.198 |
| 58.000 | 14.447 |
| 59.000 | 14.696 |
| inH₂O | kPa |
|---|---|
| 60.000 | 14.945 |
| 61.000 | 15.194 |
| 62.000 | 15.443 |
| 63.000 | 15.692 |
| 64.000 | 15.941 |
| 65.000 | 16.190 |
| 66.000 | 16.439 |
| 67.000 | 16.688 |
| 68.000 | 16.938 |
| 69.000 | 17.187 |
| 70.000 | 17.436 |
| 71.000 | 17.685 |
| 72.000 | 17.934 |
| 73.000 | 18.183 |
| 74.000 | 18.432 |
| 75.000 | 18.681 |
| 76.000 | 18.930 |
| 77.000 | 19.179 |
| 78.000 | 19.428 |
| 79.000 | 19.677 |
Inches of Water to Kilopascals Conversion
Converting Inches of Water (inH₂O) to Kilopascals (kPa) is a common pressure conversion. 1 inH₂O equals 0.249082 kPa. For example, 100 inH₂O is equal to 24.9082 kPa.
Quick Reference Values
1 inH₂O = 0.249082 kPa. 5 inH₂O = 1.24541 kPa. 10 inH₂O = 2.49082 kPa. 25 inH₂O = 6.22705 kPa. 50 inH₂O = 12.4541 kPa. 100 inH₂O = 24.9082 kPa.
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 Kilopascals?
Kilopascals (kPa) is a unit of pressure. A kilopascal equals 1,000 pascals, where 1 pascal is one newton per square meter. It is a unit of pressure used to quantify forces applied over an area and is part of the SI system [bipm-si-brochure]. Standard atmospheric pressure is approximately 101.325 kPa. The pascal was named in 1971 by the CGPM in honor of Blaise Pascal, a pioneer in fluid mechanics and pressure measurement. The kilopascal was adopted to express practical pressure values more conveniently [cgpm-resolutions]. Kilopascals are widely used in meteorology, engineering, and automotive industries worldwide. Countries using the SI system apply kPa for tire pressure, weather reports, and material stress testing [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: inch of water, inch-water, in h2o, inch h20, kpa, kilo pascals, kilopascal. All of these refer to the Inches of Water to Kilopascals conversion.