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Pressure

N/mm²tomH₂O

Convert newtons per square millimetre (N/mm²) to metres of water column (mH₂O).

Factor1 N/mm² = 101.9716 mH₂O

Converter

N/mm²

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

Result
101.972mH₂O

Rendered to 6 significant figures.

Formula

Formula
mH₂O = N/mm² × 101.9716

Multiply any value in newtons per square millimetre by 101.9716 to obtain the value in metres of water column.

Worked example

Convert 1 N/mm² to mH₂O.

  1. 01Start with 1 N/mm².
  2. 02Multiply by the conversion factor: 1 × 101.9716 = 101.972 mH₂O.
Result1 N/mm² = 101.972 mH₂O

Conversion table

N/mm²mH₂O
1101.97
2203.94
5509.86
101019.7
202039.4
505098.6
10010197
20020394
50050986
10001.0197e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from N/mm² to mH₂O?
1 N/mm² equals 101.9716 mH₂O. To convert, multiply the value in newtons per square millimetre by 101.9716.
How do I convert 1 N/mm² to mH₂O?
1 N/mm² = 101.972 mH₂O. For any value, multiply by 101.9716.
How do I convert mH₂O back to N/mm²?
Divide by the same factor — or equivalently, multiply by 0.00980665. So 1 mH₂O = 0.00980665 N/mm².
When would I need to convert newton per square millimetre to metre of water column?
Pressure conversions between N/mm² and mH₂O 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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