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Pressure

kgf/mm²toinH₂O

Convert kilograms-force per square millimetre (kgf/mm²) to inches of water column (4 °C) (inH₂O).

Factor1 kgf/mm² = 39370.08 inH₂O

Converter

kgf/mm²

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

Result
39370.1inH₂O

Rendered to 6 significant figures.

Formula

Formula
inH₂O = kgf/mm² × 39370.08

Multiply any value in kilograms-force per square millimetre by 39370.08 to obtain the value in inches of water column (4 °C).

Worked example

Convert 1 kgf/mm² to inH₂O.

  1. 01Start with 1 kgf/mm².
  2. 02Multiply by the conversion factor: 1 × 39370.08 = 39370.1 inH₂O.
Result1 kgf/mm² = 39370.1 inH₂O

Conversion table

kgf/mm²inH₂O
139370
278740
51.9685e+5
103.9370e+5
207.8740e+5
501.9685e+6
1003.9370e+6
2007.8740e+6
5001.9685e+7
10003.937e+7

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kgf/mm² to inH₂O?
1 kgf/mm² equals 39370.08 inH₂O. To convert, multiply the value in kilograms-force per square millimetre by 39370.08.
How do I convert 1 kgf/mm² to inH₂O?
1 kgf/mm² = 39370.1 inH₂O. For any value, multiply by 39370.08.
How do I convert inH₂O back to kgf/mm²?
Divide by the same factor — or equivalently, multiply by 2.54e-5. So 1 inH₂O = 2.54e-5 kgf/mm².
When would I need to convert kilogram-force per square millimetre to inch of water column (4 °C)?
Pressure conversions between kgf/mm² and inH₂O 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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