inH2O to Bar Converter
Pressure · unit-converter
Convert inH2O to Bar with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations bridge through pascal with fixed definitions (standard atmosphere = 101,325 Pa; torr and mmHg = atm/760; plus industrial/manometer units like kgf/cm², inHg, inH2O, and mmH2O).
About inH2O
Inches of water column (inH2O) is common in low-pressure HVAC and duct static-pressure measurements.
About Bar
The bar is 100,000 Pa. It is convenient for industrial and approximate atmospheric pressures (1 bar ≈ 1 atm).
How to convert inch of water (inh2o, 4 °c) to bar
1 inh2o equals 0.0024908891 bar in this tool (via pascal):
1 inh2o = (249.08891 Pa ÷ 100000 Pa) bar = 0.0024908891 bar
Each inh2o carries 249.08891 Pa and each bar 100000 Pa, so one inh2o equals 249.08891 ÷ 100000 bar.
Let p(inh2o) be pressure in inH2O (inh2o), and p(bar) in Bar (bar). Then:
p(bar) = p(inh2o) × (249.08891 / 100000)
Equivalently, divide by how many inh2o fit into one bar (Pa per bar divided by Pa per inh2o):
p(bar) = p(inh2o) ÷ 401.4630759755623
Examples
Example #1: Convert 1 inh2o to bar
1 inh2o = 1 inh2o × (249.08891/100000) bar = 0.0024908891 bar
1 inh2o = 1 inh2o ÷ 401.4630759755623 = 0.0024908891 bar
1 inh2o × (249.08891/100,000) = 0.002491 bar
Example #2: Convert 10 inh2o to bar
10 inh2o = 10 inh2o × (249.08891/100000) bar = 0.024908891 bar
10 inh2o = 10 inh2o ÷ 401.4630759755623 = 0.024908891 bar
10 inh2o × (249.08891/100,000) = 0.024909 bar
Summary
To convert inH2O to Bar, multiply the value in inh2o by (249.08891 Pa per inh2o) / (100000 Pa per bar). Equivalently: value_bar = value_inh2o × (249.08891 / 100000). Numerically, 1 inh2o equals 0.0024908891 bar.
Relationship context
Both inH2O and Bar are converted by fixed multiples of the pascal. Multiplying by (Pa per inh2o) ÷ (Pa per bar) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| inH2O (inh2o) | Bar (bar) |
|---|---|
| 0.1 | 0.0002490889 |
| 1 | 0.0024908891 |
| 2 | 0.0049817782 |
| 3 | 0.0074726673 |
| 4 | 0.0099635564 |
| 5 | 0.0124544455 |
| 6 | 0.0149453346 |
| 7 | 0.0174362237 |
| 8 | 0.0199271128 |
| 9 | 0.0224180019 |
| inH2O (inh2o) | Bar (bar) |
|---|---|
| 10 | 0.024908891 |
| 20 | 0.049817782 |
| 30 | 0.074726673 |
| 40 | 0.099635564 |
| 50 | 0.124544455 |
| 60 | 0.149453346 |
| 70 | 0.174362237 |
| 80 | 0.199271128 |
| 90 | 0.224180019 |
| 100 | 0.24908891 |