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)
0.10.980665
19.80665
219.6133
329.41995
439.2266
549.03325
658.8399
768.64655
878.4532
988.25985
mmH2O (mmh2o)Pascal (pa)
1098.0665
20196.133
30294.1995
40392.266
50490.3325
60588.399
70686.4655
80784.532
90882.5985
100980.665