Direct conversion
Convert kilopascal [kPa] to millimeter of water [mmH2O] instantly with formula, examples, chart, and FAQs.
1 kilopascal [kPa] = 101.971621 millimeter of water [mmH2O]
1 kilopascal [kPa] = 101.971621 millimeter of water [mmH2O]
Example: 1 kilopascal [kPa] equals 101.971621 millimeter of water [mmH2O].
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 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.
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.
| kilopascal [kPa] | millimeter of water [mmH2O] |
|---|---|
| 1 | 101.971621 |
| 2 | 203.943243 |
| 5 | 509.858106 |
| 10 | 1019.716213 |
| 20 | 2039.432426 |
| 25 | 2549.290532 |
| 50 | 5098.581065 |
| 100 | 10197.16213 |
| 1000 | 101971.621298 |
Use this formula: 1 kilopascal [kPa] = 101.971621 millimeter of water [mmH2O] Enter your value in the calculator and the result updates instantly.
1 kilopascal [kPa] equals 101.971621 millimeter of water [mmH2O].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.