Pressure
psftomH₂O
Convert pounds-force per square foot (psf) to metres of water column (mH₂O).
Factor1 psf = 0.004882428 mH₂O
Converter
psf
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mH₂O
Rendered to 6 significant figures.
Formula
Formula
mH₂O = psf × 0.004882428
Multiply any value in pounds-force per square foot by 0.004882428 to obtain the value in metres of water column.
Worked example
Convert 1000 psf to mH₂O.
- 01Start with 1000 psf.
- 02Multiply by the conversion factor: 1000 × 0.004882428 = 4.88243 mH₂O.
Result1000 psf = 4.88243 mH₂O
Conversion table
| psf | mH₂O |
|---|---|
| 1 | 0.0048824 |
| 2 | 0.0097649 |
| 5 | 0.024412 |
| 10 | 0.048824 |
| 20 | 0.097649 |
| 50 | 0.24412 |
| 100 | 0.48824 |
| 200 | 0.97649 |
| 500 | 2.4412 |
| 1000 | 4.8824 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from psf to mH₂O?
1 psf equals 0.004882428 mH₂O. To convert, multiply the value in pounds-force per square foot by 0.004882428.
How do I convert 1 psf to mH₂O?
1 psf = 0.00488243 mH₂O. For any value, multiply by 0.004882428.
How do I convert mH₂O back to psf?
Divide by the same factor — or equivalently, multiply by 204.8161. So 1 mH₂O = 204.816 psf.
When would I need to convert pound-force per square foot to metre of water column?
Pressure conversions between psf and mH₂O 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).