mmH2O to Kilopascal Converter
Pressure · unit-converter
Convert mmH2O to Kilopascal 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 Kilopascal
The kilopascal (kPa) equals 1,000 Pa. It appears in HVAC, building science, and many technical specifications.
How to convert millimeter of water (mmh2o, 4 °c) to kilopascal
1 mmh2o equals 0.00980665 kilopascal in this tool (via pascal):
1 mmh2o = (9.80665 Pa ÷ 1000 Pa) kpa = 0.00980665 kpa
Each mmh2o carries 9.80665 Pa and each kilopascal 1000 Pa, so one mmh2o equals 9.80665 ÷ 1000 kpa.
Let p(mmh2o) be pressure in mmH2O (mmh2o), and p(kpa) in Kilopascal (kpa). Then:
p(kpa) = p(mmh2o) × (9.80665 / 1000)
Equivalently, divide by how many mmh2o fit into one kpa (Pa per kpa divided by Pa per mmh2o):
p(kpa) = p(mmh2o) ÷ 101.97162129779284
Examples
Example #1: Convert 1 mmh2o to kilopascal
1 mmh2o = 1 mmh2o × (9.80665/1000) kpa = 0.00980665 kpa
1 mmh2o = 1 mmh2o ÷ 101.97162129779284 = 0.00980665 kpa
1 mmh2o × (9.80665/1,000) = 0.009807 kpa
Example #2: Convert 10 mmh2o to kilopascal
10 mmh2o = 10 mmh2o × (9.80665/1000) kpa = 0.0980665 kpa
10 mmh2o = 10 mmh2o ÷ 101.97162129779284 = 0.0980665 kpa
10 mmh2o × (9.80665/1,000) = 0.098066 kpa
Summary
To convert mmH2O to Kilopascal, multiply the value in mmh2o by (9.80665 Pa per mmh2o) / (1000 Pa per kpa). Equivalently: value_kpa = value_mmh2o × (9.80665 / 1000). Numerically, 1 mmh2o equals 0.00980665 kpa.
Relationship context
Both mmH2O and Kilopascal are converted by fixed multiples of the pascal. Multiplying by (Pa per mmh2o) ÷ (Pa per kpa) 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) | Kilopascal (kpa) |
|---|---|
| 0.1 | 0.000980665 |
| 1 | 0.00980665 |
| 2 | 0.0196133 |
| 3 | 0.02941995 |
| 4 | 0.0392266 |
| 5 | 0.04903325 |
| 6 | 0.0588399 |
| 7 | 0.06864655 |
| 8 | 0.0784532 |
| 9 | 0.08825985 |
| mmH2O (mmh2o) | Kilopascal (kpa) |
|---|---|
| 10 | 0.0980665 |
| 20 | 0.196133 |
| 30 | 0.2941995 |
| 40 | 0.392266 |
| 50 | 0.4903325 |
| 60 | 0.588399 |
| 70 | 0.6864655 |
| 80 | 0.784532 |
| 90 | 0.8825985 |
| 100 | 0.980665 |