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Pressure

mH₂OtocmH₂O

Convert metres of water column (mH₂O) to centimetres of water column (cmH₂O).

Factor1 mH₂O = 100 cmH₂O

Converter

mH₂O

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

Result
100cmH₂O

Rendered to 6 significant figures.

Formula

Formula
cmH₂O = mH₂O × 100

Multiply any value in metres of water column by 100 to obtain the value in centimetres of water column.

Worked example

Convert 1 mH₂O to cmH₂O.

  1. 01Start with 1 mH₂O.
  2. 02Multiply by the conversion factor: 1 × 100 = 100 cmH₂O.
Result1 mH₂O = 100 cmH₂O

Conversion table

mH₂OcmH₂O
1100
2200
5500
101000
202000
505000
10010000
20020000
50050000
10001.0000e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mH₂O to cmH₂O?
1 mH₂O equals 100 cmH₂O. To convert, multiply the value in metres of water column by 100.
How do I convert 1 mH₂O to cmH₂O?
1 mH₂O = 100 cmH₂O. For any value, multiply by 100.
How do I convert cmH₂O back to mH₂O?
Divide by the same factor — or equivalently, multiply by 0.01. So 1 cmH₂O = 0.01 mH₂O.
When would I need to convert metre of water column to centimetre of water column?
Pressure conversions between mH₂O and cmH₂O 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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