Direct conversion
Convert meter of water [mH2O] to millimeter of water [mmH2O] instantly with formula, examples, chart, and FAQs.
1 meter of water [mH2O] = 1000 millimeter of water [mmH2O]
1 meter of water [mH2O] = 1000 millimeter of water [mmH2O]
Example: 1 meter of water [mH2O] equals 1000 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 meter of water (mH2O) 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 meter of water when comparing pressure values, checking specifications, converting between systems, or preparing quick estimates.
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.
| meter of water [mH2O] | millimeter of water [mmH2O] |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 1000 | 1000000 |
Use this formula: 1 meter of water [mH2O] = 1000 millimeter of water [mmH2O] Enter your value in the calculator and the result updates instantly.
1 meter of water [mH2O] equals 1000 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.