Pressure
cmH₂OtoMPa
Convert centimetres of water column (cmH₂O) to megapascals (MPa).
Factor1 cmH₂O = 9.80665e-5 MPa
Converter
cmH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
MPa
Rendered to 6 significant figures.
Formula
Formula
MPa = cmH₂O × 9.80665e-5
Multiply any value in centimetres of water column by 9.80665e-5 to obtain the value in megapascals.
Worked example
Convert 100000 cmH₂O to MPa.
- 01Start with 100000 cmH₂O.
- 02Multiply by the conversion factor: 100000 × 9.80665e-5 = 9.80665 MPa.
Result100000 cmH₂O = 9.80665 MPa
Conversion table
| cmH₂O | MPa |
|---|---|
| 1 | 9.8067e-5 |
| 2 | 0.00019613 |
| 5 | 0.00049033 |
| 10 | 0.00098067 |
| 20 | 0.0019613 |
| 50 | 0.0049033 |
| 100 | 0.0098067 |
| 200 | 0.019613 |
| 500 | 0.049033 |
| 1000 | 0.098067 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from cmH₂O to MPa?
1 cmH₂O equals 9.80665e-5 MPa. To convert, multiply the value in centimetres of water column by 9.80665e-5.
How do I convert 1 cmH₂O to MPa?
1 cmH₂O = 9.80665e-5 MPa. For any value, multiply by 9.80665e-5.
How do I convert MPa back to cmH₂O?
Divide by the same factor — or equivalently, multiply by 10197.16. So 1 MPa = 10197.2 cmH₂O.
When would I need to convert centimetre of water column to megapascal?
Pressure conversions between cmH₂O and MPa 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).