Pressure
kPatoftH₂O
Convert kilopascals (kPa) to feet of water column (4 °C) (ftH₂O).
Factor1 kPa = 0.3345526 ftH₂O
Converter
kPa
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ftH₂O
Rendered to 6 significant figures.
Formula
Formula
ftH₂O = kPa × 0.3345526
Multiply any value in kilopascals by 0.3345526 to obtain the value in feet of water column (4 °C).
Worked example
Convert 10 kPa to ftH₂O.
- 01Start with 10 kPa.
- 02Multiply by the conversion factor: 10 × 0.3345526 = 3.34553 ftH₂O.
Result10 kPa = 3.34553 ftH₂O
Conversion table
| kPa | ftH₂O |
|---|---|
| 1 | 0.33455 |
| 2 | 0.66911 |
| 5 | 1.6728 |
| 10 | 3.3455 |
| 20 | 6.6911 |
| 50 | 16.728 |
| 100 | 33.455 |
| 200 | 66.911 |
| 500 | 167.28 |
| 1000 | 334.55 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kPa to ftH₂O?
1 kPa equals 0.3345526 ftH₂O. To convert, multiply the value in kilopascals by 0.3345526.
How do I convert 1 kPa to ftH₂O?
1 kPa = 0.334553 ftH₂O. For any value, multiply by 0.3345526.
How do I convert ftH₂O back to kPa?
Divide by the same factor — or equivalently, multiply by 2.989067. So 1 ftH₂O = 2.98907 kPa.
When would I need to convert kilopascal to foot of water column (4 °C)?
Pressure conversions between kPa 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).