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Pressure

mH₂OtoMPa

Convert metres of water column (mH₂O) to megapascals (MPa).

Factor1 mH₂O = 0.00980665 MPa

Converter

mH₂O

Accepts numbers or expressions, e.g. 150 + 14.7

Result
9.80665MPa

Rendered to 6 significant figures.

Formula

Formula
MPa = mH₂O × 0.00980665

Multiply any value in metres of water column by 0.00980665 to obtain the value in megapascals.

Worked example

Convert 1000 mH₂O to MPa.

  1. 01Start with 1000 mH₂O.
  2. 02Multiply by the conversion factor: 1000 × 0.00980665 = 9.80665 MPa.
Result1000 mH₂O = 9.80665 MPa

Conversion table

mH₂OMPa
10.0098067
20.019613
50.049033
100.098067
200.19613
500.49033
1000.98067
2001.9613
5004.9033
10009.8066

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mH₂O to MPa?
1 mH₂O equals 0.00980665 MPa. To convert, multiply the value in metres of water column by 0.00980665.
How do I convert 1 mH₂O to MPa?
1 mH₂O = 0.00980665 MPa. For any value, multiply by 0.00980665.
How do I convert MPa back to mH₂O?
Divide by the same factor — or equivalently, multiply by 101.9716. So 1 MPa = 101.972 mH₂O.
When would I need to convert metre of water column to megapascal?
Pressure conversions between mH₂O 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).

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