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Pressure

cmH₂OtokPa

Convert centimetres of water column (cmH₂O) to kilopascals (kPa).

Factor1 cmH₂O = 0.0980665 kPa

Converter

cmH₂O

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

Result
9.80665kPa

Rendered to 6 significant figures.

Formula

Formula
kPa = cmH₂O × 0.0980665

Multiply any value in centimetres of water column by 0.0980665 to obtain the value in kilopascals.

Worked example

Convert 100 cmH₂O to kPa.

  1. 01Start with 100 cmH₂O.
  2. 02Multiply by the conversion factor: 100 × 0.0980665 = 9.80665 kPa.
Result100 cmH₂O = 9.80665 kPa

Conversion table

cmH₂OkPa
10.098067
20.19613
50.49033
100.98067
201.9613
504.9033
1009.8066
20019.613
50049.033
100098.067

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from cmH₂O to kPa?
1 cmH₂O equals 0.0980665 kPa. To convert, multiply the value in centimetres of water column by 0.0980665.
How do I convert 1 cmH₂O to kPa?
1 cmH₂O = 0.0980665 kPa. For any value, multiply by 0.0980665.
How do I convert kPa back to cmH₂O?
Divide by the same factor — or equivalently, multiply by 10.19716. So 1 kPa = 10.1972 cmH₂O.
When would I need to convert centimetre of water column to kilopascal?
Pressure conversions between cmH₂O 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).

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