Pressure
mH₂OtokPa
Convert metres of water column (mH₂O) to kilopascals (kPa).
Factor1 mH₂O = 9.80665 kPa
Converter
mH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kPa
Rendered to 6 significant figures.
Formula
Formula
kPa = mH₂O × 9.80665
Multiply any value in metres of water column by 9.80665 to obtain the value in kilopascals.
Worked example
Convert 1 mH₂O to kPa.
- 01Start with 1 mH₂O.
- 02Multiply by the conversion factor: 1 × 9.80665 = 9.80665 kPa.
Result1 mH₂O = 9.80665 kPa
Conversion table
| mH₂O | kPa |
|---|---|
| 1 | 9.8066 |
| 2 | 19.613 |
| 5 | 49.033 |
| 10 | 98.067 |
| 20 | 196.13 |
| 50 | 490.33 |
| 100 | 980.66 |
| 200 | 1961.3 |
| 500 | 4903.3 |
| 1000 | 9806.6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mH₂O to kPa?
1 mH₂O equals 9.80665 kPa. To convert, multiply the value in metres of water column by 9.80665.
How do I convert 1 mH₂O to kPa?
1 mH₂O = 9.80665 kPa. For any value, multiply by 9.80665.
How do I convert kPa back to mH₂O?
Divide by the same factor — or equivalently, multiply by 0.1019716. So 1 kPa = 0.101972 mH₂O.
When would I need to convert metre of water column to kilopascal?
Pressure conversions between mH₂O and kPa are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).