Pressure
mH₂OtoPa
Convert metres of water column (mH₂O) to pascals (Pa).
Factor1 mH₂O = 9806.65 Pa
Converter
mH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Pa
Rendered to 6 significant figures.
Formula
Formula
Pa = mH₂O × 9806.65
Multiply any value in metres of water column by 9806.65 to obtain the value in pascals.
Worked example
Convert 1 mH₂O to Pa.
- 01Start with 1 mH₂O.
- 02Multiply by the conversion factor: 1 × 9806.65 = 9806.65 Pa.
Result1 mH₂O = 9806.65 Pa
Conversion table
| mH₂O | Pa |
|---|---|
| 1 | 9806.6 |
| 2 | 19613 |
| 5 | 49033 |
| 10 | 98067 |
| 20 | 1.9613e+5 |
| 50 | 4.9033e+5 |
| 100 | 9.8067e+5 |
| 200 | 1.9613e+6 |
| 500 | 4.9033e+6 |
| 1000 | 9.8067e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mH₂O to Pa?
1 mH₂O equals 9806.65 Pa. To convert, multiply the value in metres of water column by 9806.65.
How do I convert 1 mH₂O to Pa?
1 mH₂O = 9806.65 Pa. For any value, multiply by 9806.65.
How do I convert Pa back to mH₂O?
Divide by the same factor — or equivalently, multiply by 0.0001019716. So 1 Pa = 0.000101972 mH₂O.
When would I need to convert metre of water column to pascal?
Pressure conversions between mH₂O and Pa 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).