Kilopascals to Inches of Water (kPa → inH₂O)
Formula
1 kPa = 4.01474213311279 inH₂OConversion Table
| kPa | inH₂O |
|---|---|
| 0 | 0 |
| 1.0000 | 4.0147 |
| 2.0000 | 8.0295 |
| 3.0000 | 12.044 |
| 4.0000 | 16.059 |
| 5.0000 | 20.074 |
| 6.0000 | 24.088 |
| 7.0000 | 28.103 |
| 8.0000 | 32.118 |
| 9.0000 | 36.133 |
| 10.000 | 40.147 |
| 11.000 | 44.162 |
| 12.000 | 48.177 |
| 13.000 | 52.192 |
| 14.000 | 56.206 |
| 15.000 | 60.221 |
| 16.000 | 64.236 |
| 17.000 | 68.251 |
| 18.000 | 72.265 |
| 19.000 | 76.280 |
| kPa | inH₂O |
|---|---|
| 20.000 | 80.295 |
| 21.000 | 84.310 |
| 22.000 | 88.324 |
| 23.000 | 92.339 |
| 24.000 | 96.354 |
| 25.000 | 100.37 |
| 26.000 | 104.38 |
| 27.000 | 108.40 |
| 28.000 | 112.41 |
| 29.000 | 116.43 |
| 30.000 | 120.44 |
| 31.000 | 124.46 |
| 32.000 | 128.47 |
| 33.000 | 132.49 |
| 34.000 | 136.50 |
| 35.000 | 140.52 |
| 36.000 | 144.53 |
| 37.000 | 148.55 |
| 38.000 | 152.56 |
| 39.000 | 156.57 |
| kPa | inH₂O |
|---|---|
| 40.000 | 160.59 |
| 41.000 | 164.60 |
| 42.000 | 168.62 |
| 43.000 | 172.63 |
| 44.000 | 176.65 |
| 45.000 | 180.66 |
| 46.000 | 184.68 |
| 47.000 | 188.69 |
| 48.000 | 192.71 |
| 49.000 | 196.72 |
| 50.000 | 200.74 |
| 51.000 | 204.75 |
| 52.000 | 208.77 |
| 53.000 | 212.78 |
| 54.000 | 216.80 |
| 55.000 | 220.81 |
| 56.000 | 224.83 |
| 57.000 | 228.84 |
| 58.000 | 232.86 |
| 59.000 | 236.87 |
| kPa | inH₂O |
|---|---|
| 60.000 | 240.88 |
| 61.000 | 244.90 |
| 62.000 | 248.91 |
| 63.000 | 252.93 |
| 64.000 | 256.94 |
| 65.000 | 260.96 |
| 66.000 | 264.97 |
| 67.000 | 268.99 |
| 68.000 | 273.00 |
| 69.000 | 277.02 |
| 70.000 | 281.03 |
| 71.000 | 285.05 |
| 72.000 | 289.06 |
| 73.000 | 293.08 |
| 74.000 | 297.09 |
| 75.000 | 301.11 |
| 76.000 | 305.12 |
| 77.000 | 309.14 |
| 78.000 | 313.15 |
| 79.000 | 317.16 |
Kilopascals to Inches of Water Conversion
Converting Kilopascals (kPa) to Inches of Water (inH₂O) is a common pressure conversion. 1 kPa equals 4.014742 inH₂O. For example, 100 kPa is equal to 401.474213 inH₂O.
Quick Mental Math: Kilopascals to Inches of Water
Pressure units (atm, bar, psi, pascal) are diverse; use atmospheres as a reference tier.
Why is converting Kilopascals to Inches of Water tricky?
Magnitude or direction confusion between kilopascals and inches-of-water is the primary error source.
Quick Reference Values
1 kPa = 4.014742 inH₂O. 5 kPa = 20.073711 inH₂O. 10 kPa = 40.147421 inH₂O. 25 kPa = 100.368553 inH₂O. 50 kPa = 200.737107 inH₂O. 100 kPa = 401.474213 inH₂O.
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].
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].
Common Misspellings
People often search for this conversion using these alternate spellings: kpa, kilo pascals, kilopascal, inch of water, inch-water, in h2o, inch h20. All of these refer to the Kilopascals to Inches of Water conversion.