inH2O to bar converter
1 inH2O = 0.00249082 bar
And 1 bar = 401.474 inH2O. Inches of water column to bar.
Formula
bar = inH2O × 0.00249082
A reading of 15 inH2O is 15 × 0.00249082 = 0.0373623 bar.
inH2O to bar table
| inH2O | bar |
|---|---|
| 1 inH2O | 0.00249082 bar |
| 5 inH2O | 0.0124541 bar |
| 10 inH2O | 0.0249082 bar |
| 15 inH2O | 0.0373623 bar |
| 30 inH2O | 0.0747246 bar |
| 50 inH2O | 0.124541 bar |
| 100 inH2O | 0.249082 bar |
| 500 inH2O | 1.24541 bar |
| 1,000 inH2O | 2.49082 bar |
bar to inH2O table
| bar | inH2O |
|---|---|
| 1 bar | 401.474 inH2O |
| 5 bar | 2,007.37 inH2O |
| 10 bar | 4,014.74 inH2O |
| 15 bar | 6,022.11 inH2O |
| 30 bar | 12,044.2 inH2O |
| 50 bar | 20,073.7 inH2O |
About these units
inH2O (inches of water column): Low duct and furnace pressures, at the conventional 4 °C water reference.
bar (bar): Close to one atmosphere; widely used for industrial and pneumatic gauges outside the US.
Gauge pressure (psig, barg) is measured relative to the surrounding atmosphere; absolute pressure (psia, bara) is relative to vacuum. Converting units never changes that reference: absolute = gauge + about 14.696 psi (1.01325 bar) at sea level. Stress uses the same units: 1 MPa = 1 N/mm².
Convert bar to inH2O instead · All pressure and stress conversions