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Pressure

inH₂Otokgf/mm²

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

Factor1 inH₂O = 2.54e-5 kgf/mm²

Converter

inH₂O

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

Result
2.54kgf/mm²

Rendered to 6 significant figures.

Formula

Formula
kgf/mm² = inH₂O × 2.54e-5

Multiply any value in inches of water column (4 °C) by 2.54e-5 to obtain the value in kilograms-force per square millimetre.

Worked example

Convert 100000 inH₂O to kgf/mm².

  1. 01Start with 100000 inH₂O.
  2. 02Multiply by the conversion factor: 100000 × 2.54e-5 = 2.54 kgf/mm².
Result100000 inH₂O = 2.54 kgf/mm²

Conversion table

inH₂Okgf/mm²
12.54e-5
25.08e-5
50.000127
100.000254
200.000508
500.00127
1000.00254
2000.00508
5000.0127
10000.0254

Reference values rounded to 5 significant figures for display.

FAQ

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