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Pressure

N/mm²tocmH₂O

Convert newtons per square millimetre (N/mm²) to centimetres of water column (cmH₂O).

Factor1 N/mm² = 10197.16 cmH₂O

Converter

N/mm²

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

Result
10197.2cmH₂O

Rendered to 6 significant figures.

Formula

Formula
cmH₂O = N/mm² × 10197.16

Multiply any value in newtons per square millimetre by 10197.16 to obtain the value in centimetres of water column.

Worked example

Convert 1 N/mm² to cmH₂O.

  1. 01Start with 1 N/mm².
  2. 02Multiply by the conversion factor: 1 × 10197.16 = 10197.2 cmH₂O.
Result1 N/mm² = 10197.2 cmH₂O

Conversion table

N/mm²cmH₂O
110197
220394
550986
101.0197e+5
202.0394e+5
505.0986e+5
1001.0197e+6
2002.0394e+6
5005.0986e+6
10001.0197e+7

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from N/mm² to cmH₂O?
1 N/mm² equals 10197.16 cmH₂O. To convert, multiply the value in newtons per square millimetre by 10197.16.
How do I convert 1 N/mm² to cmH₂O?
1 N/mm² = 10197.2 cmH₂O. For any value, multiply by 10197.16.
How do I convert cmH₂O back to N/mm²?
Divide by the same factor — or equivalently, multiply by 9.80665e-5. So 1 cmH₂O = 9.80665e-5 N/mm².
When would I need to convert newton per square millimetre to centimetre of water column?
Pressure conversions between N/mm² 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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