mmH2O to Pascal Converter
Pressure · unit-converter
Convert mmH2O to Pascal 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 mmH2O
Millimeters of water column (mmH2O) is used for very low differential pressure in instrumentation and ventilation.
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.
How to convert millimeter of water (mmh2o, 4 °c) to pascal
1 mmh2o equals 9.80665 pascal in this tool (via pascal):
1 mmh2o = (9.80665 Pa ÷ 1 Pa) pa = 9.80665 pa
Each mmh2o carries 9.80665 Pa and each pascal 1 Pa, so one mmh2o equals 9.80665 ÷ 1 pa.
Let p(mmh2o) be pressure in mmH2O (mmh2o), and p(pa) in Pascal (pa). Then:
p(pa) = p(mmh2o) × (9.80665 / 1)
Equivalently, divide by how many mmh2o fit into one pa (Pa per pa divided by Pa per mmh2o):
p(pa) = p(mmh2o) ÷ 0.10197162129779283
Examples
Example #1: Convert 1 mmh2o to pascal
1 mmh2o = 1 mmh2o × (9.80665/1) pa = 9.80665 pa
1 mmh2o = 1 mmh2o ÷ 0.10197162129779283 = 9.80665 pa
1 mmh2o × (9.80665/1) = 9.806650 pa
Example #2: Convert 10 mmh2o to pascal
10 mmh2o = 10 mmh2o × (9.80665/1) pa = 98.0665 pa
10 mmh2o = 10 mmh2o ÷ 0.10197162129779283 = 98.0665 pa
10 mmh2o × (9.80665/1) = 98.066500 pa
Summary
To convert mmH2O to Pascal, multiply the value in mmh2o by (9.80665 Pa per mmh2o) / (1 Pa per pa). Equivalently: value_pa = value_mmh2o × (9.80665 / 1). Numerically, 1 mmh2o equals 9.80665 pa.
Relationship context
Both mmH2O and Pascal are converted by fixed multiples of the pascal. Multiplying by (Pa per mmh2o) ÷ (Pa per pa) gives the same result as passing through pascal, keeping bar, atm, PSI, kPa, hPa, torr, and mmHg consistent on the hub.
Conversion tables
| mmH2O (mmh2o) | Pascal (pa) |
|---|---|
| 0.1 | 0.980665 |
| 1 | 9.80665 |
| 2 | 19.6133 |
| 3 | 29.41995 |
| 4 | 39.2266 |
| 5 | 49.03325 |
| 6 | 58.8399 |
| 7 | 68.64655 |
| 8 | 78.4532 |
| 9 | 88.25985 |
| mmH2O (mmh2o) | Pascal (pa) |
|---|---|
| 10 | 98.0665 |
| 20 | 196.133 |
| 30 | 294.1995 |
| 40 | 392.266 |
| 50 | 490.3325 |
| 60 | 588.399 |
| 70 | 686.4655 |
| 80 | 784.532 |
| 90 | 882.5985 |
| 100 | 980.665 |