Pascal to inH2O Converter
Pressure · unit-converter
Convert Pascal to inH2O 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 Pascal
The pascal (Pa) is the SI unit of pressure (one newton per square meter). It is the common reference for scientific and engineering work.
About inH2O
Inches of water column (inH2O) is common in low-pressure HVAC and duct static-pressure measurements.
How to convert pascal to inch of water (inh2o, 4 °c)
1 pascal equals 0.004014630759755623 inh2o in this tool (via pascal):
1 pa = (1 Pa ÷ 249.08891 Pa) inh2o = 0.004014630759755623 inh2o
Each pascal carries 1 Pa and each inh2o 249.08891 Pa, so one pa equals 1 ÷ 249.08891 inh2o.
Let p(pa) be pressure in Pascal (pa), and p(inh2o) in inH2O (inh2o). Then:
p(inh2o) = p(pa) × (1 / 249.08891)
Equivalently, divide by how many pa fit into one inh2o (Pa per inh2o divided by Pa per pa):
p(inh2o) = p(pa) ÷ 249.08891
Examples
Example #1: Convert 1 pa to inh2o
1 pa = 1 pa × (1/249.08891) inh2o = 0.0040146308 inh2o
1 pa = 1 pa ÷ 249.08891 = 0.0040146308 inh2o
1 pa × (1/249.08891) = 0.004015 inh2o
Example #2: Convert 10 pa to inh2o
10 pa = 10 pa × (1/249.08891) inh2o = 0.0401463076 inh2o
10 pa = 10 pa ÷ 249.08891 = 0.0401463076 inh2o
10 pa × (1/249.08891) = 0.040146 inh2o
Summary
To convert Pascal to inH2O, multiply the value in pa by (1 Pa per pa) / (249.08891 Pa per inh2o). Equivalently: value_inh2o = value_pa × (1 / 249.08891). Numerically, 1 pa equals 0.004014630759755623 inh2o.
Relationship context
Both Pascal and inH2O are converted by fixed multiples of the pascal. Multiplying by (Pa per pa) ÷ (Pa per inh2o) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| Pascal (pa) | inH2O (inh2o) |
|---|---|
| 0.1 | 0.0004014631 |
| 1 | 0.0040146308 |
| 2 | 0.0080292615 |
| 3 | 0.0120438923 |
| 4 | 0.016058523 |
| 5 | 0.0200731538 |
| 6 | 0.0240877846 |
| 7 | 0.0281024153 |
| 8 | 0.0321170461 |
| 9 | 0.0361316768 |
| Pascal (pa) | inH2O (inh2o) |
|---|---|
| 10 | 0.0401463076 |
| 20 | 0.0802926152 |
| 30 | 0.1204389228 |
| 40 | 0.1605852304 |
| 50 | 0.200731538 |
| 60 | 0.2408778456 |
| 70 | 0.2810241532 |
| 80 | 0.3211704608 |
| 90 | 0.3613167684 |
| 100 | 0.401463076 |