Pascal to mmH2O Converter
Pressure · unit-converter
Convert Pascal to mmH2O 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 mmH2O
Millimeters of water column (mmH2O) is used for very low differential pressure in instrumentation and ventilation.
How to convert pascal to millimeter of water (mmh2o, 4 °c)
1 pascal equals 0.10197162129779283 mmh2o in this tool (via pascal):
1 pa = (1 Pa ÷ 9.80665 Pa) mmh2o = 0.10197162129779283 mmh2o
Each pascal carries 1 Pa and each mmh2o 9.80665 Pa, so one pa equals 1 ÷ 9.80665 mmh2o.
Let p(pa) be pressure in Pascal (pa), and p(mmh2o) in mmH2O (mmh2o). Then:
p(mmh2o) = p(pa) × (1 / 9.80665)
Equivalently, divide by how many pa fit into one mmh2o (Pa per mmh2o divided by Pa per pa):
p(mmh2o) = p(pa) ÷ 9.80665
Examples
Example #1: Convert 1 pa to mmh2o
1 pa = 1 pa × (1/9.80665) mmh2o = 0.1019716213 mmh2o
1 pa = 1 pa ÷ 9.80665 = 0.1019716213 mmh2o
1 pa × (1/9.80665) = 0.101972 mmh2o
Example #2: Convert 10 pa to mmh2o
10 pa = 10 pa × (1/9.80665) mmh2o = 1.019716213 mmh2o
10 pa = 10 pa ÷ 9.80665 = 1.019716213 mmh2o
10 pa × (1/9.80665) = 1.019716 mmh2o
Summary
To convert Pascal to mmH2O, multiply the value in pa by (1 Pa per pa) / (9.80665 Pa per mmh2o). Equivalently: value_mmh2o = value_pa × (1 / 9.80665). Numerically, 1 pa equals 0.10197162129779283 mmh2o.
Relationship context
Both Pascal and mmH2O are converted by fixed multiples of the pascal. Multiplying by (Pa per pa) ÷ (Pa per mmh2o) 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) | mmH2O (mmh2o) |
|---|---|
| 0.1 | 0.0101971621 |
| 1 | 0.1019716213 |
| 2 | 0.2039432426 |
| 3 | 0.3059148639 |
| 4 | 0.4078864852 |
| 5 | 0.5098581065 |
| 6 | 0.6118297278 |
| 7 | 0.7138013491 |
| 8 | 0.8157729704 |
| 9 | 0.9177445917 |
| Pascal (pa) | mmH2O (mmh2o) |
|---|---|
| 10 | 1.019716213 |
| 20 | 2.039432426 |
| 30 | 3.0591486389 |
| 40 | 4.0788648519 |
| 50 | 5.0985810649 |
| 60 | 6.1182972779 |
| 70 | 7.1380134908 |
| 80 | 8.1577297038 |
| 90 | 9.1774459168 |
| 100 | 10.1971621298 |