Direct conversion
Convert millimeter of water [mmH2O] to kilopascal [kPa] instantly with formula, examples, chart, and FAQs.
1 millimeter of water [mmH2O] = 0.009807 kilopascal [kPa]
1 millimeter of water [mmH2O] = 0.009807 kilopascal [kPa]
Example: 1 millimeter of water [mmH2O] equals 0.009807 kilopascal [kPa].
Pressure conversions use pascal as the reference unit and include common engineering, weather, tire, and laboratory pressure units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-08-14.
The millimeter of water (mmH2O) is a pressure unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse millimeter of water when comparing pressure values, checking specifications, converting between systems, or preparing quick estimates.
The kilopascal is a metric pressure unit equal to 1000 pascals.
HistoryThe pascal is the SI derived pressure unit, and kilopascals are convenient for everyday pressure values.
Current useKilopascals are used for tire pressure, weather, engineering specifications, medical equipment, and HVAC documentation.
| millimeter of water [mmH2O] | kilopascal [kPa] |
|---|---|
| 1 | 0.009807 |
| 2 | 0.019613 |
| 5 | 0.049033 |
| 10 | 0.098067 |
| 20 | 0.196133 |
| 25 | 0.245166 |
| 50 | 0.490333 |
| 100 | 0.980665 |
| 1000 | 9.80665 |
Use this formula: 1 millimeter of water [mmH2O] = 0.009807 kilopascal [kPa] Enter your value in the calculator and the result updates instantly.
1 millimeter of water [mmH2O] equals 0.009807 kilopascal [kPa].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.