Atmosphere to Inch of Water Converter
EngineeringPascals, bar, psi and more.
How to convert Atmosphere to Inch of Water
Multiply the atmosphere value by 406.782: 1 atm = 406.782 inH₂O. Going the other way, 1 inH₂O = 0.00245832 atm, so divide by 406.782 or use the Inch of Water to Atmosphere converter.
About these units
Atmosphere (atm)
A standard atmosphere is defined as exactly 101,325 pascals, roughly the average air pressure at sea level. It is about 14.7 psi or 1.013 bar.
Inch of Water (inH₂O)
An inch of water is the pressure of a column of water 1 inch high, about 249 pascals. It is used for ventilation ducts and low gas pressures.
Atmosphere to Inch of Water conversion table
| Atmosphere (atm) | Inch of Water (inH₂O) |
|---|---|
| 1 atm | 406.782 inH₂O |
| 2 atm | 813.565 inH₂O |
| 3 atm | 1,220.35 inH₂O |
| 4 atm | 1,627.13 inH₂O |
| 5 atm | 2,033.91 inH₂O |
| 10 atm | 4,067.82 inH₂O |
| 20 atm | 8,135.65 inH₂O |
| 25 atm | 10,169.6 inH₂O |
| 50 atm | 20,339.1 inH₂O |
| 100 atm | 40,678.2 inH₂O |
| 500 atm | 203,391 inH₂O |
| 1,000 atm | 406,782 inH₂O |