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Pressure

ftH₂Otokgf/mm²

Convert feet of water column (4 °C) (ftH₂O) to kilograms-force per square millimetre (kgf/mm²).

Factor1 ftH₂O = 0.0003048 kgf/mm²

Converter

ftH₂O

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

Result
3.048kgf/mm²

Rendered to 6 significant figures.

Formula

Formula
kgf/mm² = ftH₂O × 0.0003048

Multiply any value in feet of water column (4 °C) by 0.0003048 to obtain the value in kilograms-force per square millimetre.

Worked example

Convert 10000 ftH₂O to kgf/mm².

  1. 01Start with 10000 ftH₂O.
  2. 02Multiply by the conversion factor: 10000 × 0.0003048 = 3.048 kgf/mm².
Result10000 ftH₂O = 3.048 kgf/mm²

Conversion table

ftH₂Okgf/mm²
10.0003048
20.0006096
50.001524
100.003048
200.006096
500.01524
1000.03048
2000.06096
5000.1524
10000.3048

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from ftH₂O to kgf/mm²?
1 ftH₂O equals 0.0003048 kgf/mm². To convert, multiply the value in feet of water column (4 °C) by 0.0003048.
How do I convert 1 ftH₂O to kgf/mm²?
1 ftH₂O = 0.0003048 kgf/mm². For any value, multiply by 0.0003048.
How do I convert kgf/mm² back to ftH₂O?
Divide by the same factor — or equivalently, multiply by 3280.84. So 1 kgf/mm² = 3280.84 ftH₂O.
When would I need to convert foot of water column (4 °C) to kilogram-force per square millimetre?
Pressure conversions between ftH₂O 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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