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Pressure

ftH₂Otobar

Convert feet of water column (4 °C) (ftH₂O) to bar (bar).

Factor1 ftH₂O = 0.02989067 bar

Converter

ftH₂O

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

Result
0.89672bar

Rendered to 6 significant figures.

Formula

Formula
bar = ftH₂O × 0.02989067

Multiply any value in feet of water column (4 °C) by 0.02989067 to obtain the value in bar.

Worked example

Convert 30 ftH₂O to bar.

  1. 01Start with 30 ftH₂O.
  2. 02Multiply by the conversion factor: 30 × 0.02989067 = 0.89672 bar.
Result30 ftH₂O = 0.89672 bar

Conversion table

ftH₂Obar
10.029891
20.059781
50.14945
100.29891
200.59781
501.4945
1002.9891
2005.9781
50014.945
100029.891

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from ftH₂O to bar?
1 ftH₂O equals 0.02989067 bar. To convert, multiply the value in feet of water column (4 °C) by 0.02989067.
How do I convert 1 ftH₂O to bar?
1 ftH₂O = 0.0298907 bar. For any value, multiply by 0.02989067.
How do I convert bar back to ftH₂O?
Divide by the same factor — or equivalently, multiply by 33.45526. So 1 bar = 33.4553 ftH₂O.
When would I need to convert foot of water column (4 °C) to bar?
Pressure conversions between ftH₂O and bar 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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