Pressure
cmH₂Otopsf
Convert centimetres of water column (cmH₂O) to pounds-force per square foot (psf).
Factor1 cmH₂O = 2.048161 psf
Converter
cmH₂O
Accepts numbers or expressions, e.g. 150 + 14.7
Result
psf
Rendered to 6 significant figures.
Formula
Formula
psf = cmH₂O × 2.048161
Multiply any value in centimetres of water column by 2.048161 to obtain the value in pounds-force per square foot.
Worked example
Convert 10 cmH₂O to psf.
- 01Start with 10 cmH₂O.
- 02Multiply by the conversion factor: 10 × 2.048161 = 20.4816 psf.
Result10 cmH₂O = 20.4816 psf
Conversion table
| cmH₂O | psf |
|---|---|
| 1 | 2.0482 |
| 2 | 4.0963 |
| 5 | 10.241 |
| 10 | 20.482 |
| 20 | 40.963 |
| 50 | 102.41 |
| 100 | 204.82 |
| 200 | 409.63 |
| 500 | 1024.1 |
| 1000 | 2048.2 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from cmH₂O to psf?
1 cmH₂O equals 2.048161 psf. To convert, multiply the value in centimetres of water column by 2.048161.
How do I convert 1 cmH₂O to psf?
1 cmH₂O = 2.04816 psf. For any value, multiply by 2.048161.
How do I convert psf back to cmH₂O?
Divide by the same factor — or equivalently, multiply by 0.4882428. So 1 psf = 0.488243 cmH₂O.
When would I need to convert centimetre of water column to pound-force per square foot?
Pressure conversions between cmH₂O 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).