Pressure
mmHgtopsf
Convert millimetres of mercury (mmHg) to pounds-force per square foot (psf).
Factor1 mmHg = 2.784496 psf
Converter
mmHg
Accepts numbers or expressions, e.g. 150 + 14.7
Result
psf
Rendered to 6 significant figures.
Formula
Formula
psf = mmHg × 2.784496
Multiply any value in millimetres of mercury by 2.784496 to obtain the value in pounds-force per square foot.
Worked example
Convert 1 mmHg to psf.
- 01Start with 1 mmHg.
- 02Multiply by the conversion factor: 1 × 2.784496 = 2.7845 psf.
Result1 mmHg = 2.7845 psf
Conversion table
| mmHg | psf |
|---|---|
| 1 | 2.7845 |
| 2 | 5.569 |
| 5 | 13.922 |
| 10 | 27.845 |
| 20 | 55.69 |
| 50 | 139.22 |
| 100 | 278.45 |
| 200 | 556.9 |
| 500 | 1392.2 |
| 1000 | 2784.5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mmHg to psf?
1 mmHg equals 2.784496 psf. To convert, multiply the value in millimetres of mercury by 2.784496.
How do I convert 1 mmHg to psf?
1 mmHg = 2.7845 psf. For any value, multiply by 2.784496.
How do I convert psf back to mmHg?
Divide by the same factor — or equivalently, multiply by 0.3591314. So 1 psf = 0.359131 mmHg.
When would I need to convert millimetre of mercury to pound-force per square foot?
Pressure conversions between mmHg 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).