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Pressure

N/mm²toftH₂O

Convert newtons per square millimetre (N/mm²) to feet of water column (4 °C) (ftH₂O).

Factor1 N/mm² = 334.5526 ftH₂O

Converter

N/mm²

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

Result
334.553ftH₂O

Rendered to 6 significant figures.

Formula

Formula
ftH₂O = N/mm² × 334.5526

Multiply any value in newtons per square millimetre by 334.5526 to obtain the value in feet of water column (4 °C).

Worked example

Convert 1 N/mm² to ftH₂O.

  1. 01Start with 1 N/mm².
  2. 02Multiply by the conversion factor: 1 × 334.5526 = 334.553 ftH₂O.
Result1 N/mm² = 334.553 ftH₂O

Conversion table

N/mm²ftH₂O
1334.55
2669.11
51672.8
103345.5
206691.1
5016728
10033455
20066911
5001.6728e+5
10003.3455e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from N/mm² to ftH₂O?
1 N/mm² equals 334.5526 ftH₂O. To convert, multiply the value in newtons per square millimetre by 334.5526.
How do I convert 1 N/mm² to ftH₂O?
1 N/mm² = 334.553 ftH₂O. For any value, multiply by 334.5526.
How do I convert ftH₂O back to N/mm²?
Divide by the same factor — or equivalently, multiply by 0.002989067. So 1 ftH₂O = 0.00298907 N/mm².
When would I need to convert newton per square millimetre to foot of water column (4 °C)?
Pressure conversions between N/mm² and ftH₂O 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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