Pressure
ftH₂Otopsf
Convert feet of water column (4 °C) (ftH₂O) to pounds-force per square foot (psf).
Factor1 ftH₂O = 62.42796 psf
Converter
ftH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
psf
Rendered to 6 significant figures.
Formula
Formula
psf = ftH₂O × 62.42796
Multiply any value in feet of water column (4 °C) by 62.42796 to obtain the value in pounds-force per square foot.
Worked example
Convert 1 ftH₂O to psf.
- 01Start with 1 ftH₂O.
- 02Multiply by the conversion factor: 1 × 62.42796 = 62.428 psf.
Result1 ftH₂O = 62.428 psf
Conversion table
| ftH₂O | psf |
|---|---|
| 1 | 62.428 |
| 2 | 124.86 |
| 5 | 312.14 |
| 10 | 624.28 |
| 20 | 1248.6 |
| 50 | 3121.4 |
| 100 | 6242.8 |
| 200 | 12486 |
| 500 | 31214 |
| 1000 | 62428 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ftH₂O to psf?
1 ftH₂O equals 62.42796 psf. To convert, multiply the value in feet of water column (4 °C) by 62.42796.
How do I convert 1 ftH₂O to psf?
1 ftH₂O = 62.428 psf. For any value, multiply by 62.42796.
How do I convert psf back to ftH₂O?
Divide by the same factor — or equivalently, multiply by 0.01601846. So 1 psf = 0.0160185 ftH₂O.
When would I need to convert foot of water column (4 °C) to pound-force per square foot?
Pressure conversions between ftH₂O and psf 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).