Pressure
ftH₂OtokPa
Convert feet of water column (4 °C) (ftH₂O) to kilopascals (kPa).
Factor1 ftH₂O = 2.989067 kPa
Converter
ftH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kPa
Rendered to 6 significant figures.
Formula
Formula
kPa = ftH₂O × 2.989067
Multiply any value in feet of water column (4 °C) by 2.989067 to obtain the value in kilopascals.
Worked example
Convert 10 ftH₂O to kPa.
- 01Start with 10 ftH₂O.
- 02Multiply by the conversion factor: 10 × 2.989067 = 29.8907 kPa.
Result10 ftH₂O = 29.8907 kPa
Conversion table
| ftH₂O | kPa |
|---|---|
| 1 | 2.9891 |
| 2 | 5.9781 |
| 5 | 14.945 |
| 10 | 29.891 |
| 20 | 59.781 |
| 50 | 149.45 |
| 100 | 298.91 |
| 200 | 597.81 |
| 500 | 1494.5 |
| 1000 | 2989.1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ftH₂O to kPa?
1 ftH₂O equals 2.989067 kPa. To convert, multiply the value in feet of water column (4 °C) by 2.989067.
How do I convert 1 ftH₂O to kPa?
1 ftH₂O = 2.98907 kPa. For any value, multiply by 2.989067.
How do I convert kPa back to ftH₂O?
Divide by the same factor — or equivalently, multiply by 0.3345526. So 1 kPa = 0.334553 ftH₂O.
When would I need to convert foot of water column (4 °C) to kilopascal?
Pressure conversions between ftH₂O and kPa 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).