Stress
mmHgtopsf
Convert millimetres of mercury (stress) (mmHg) to pounds-force per square foot (stress) (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 (stress) by 2.784496 to obtain the value in pounds-force per square foot (stress).
Worked example
Convert 10 mmHg to psf.
- 01Start with 10 mmHg.
- 02Multiply by the conversion factor: 10 × 2.784496 = 27.845 psf.
Result10 mmHg = 27.845 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 (stress) 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 (stress) to pound-force per square foot (stress)?
Stress conversions between mmHg and psf are routine in mechanics-of-materials work: yield, ultimate and allowable-stress specification, Young's-modulus tables and structural-design code calculations. MPa and N/mm² dominate ISO and European datasheets, psi and ksi dominate US structural codes, and kgf/cm² and kgf/mm² appear in legacy JIS and heavy-engineering documentation. Stress is the same physical dimension as pressure but a different engineering quantity — this category is mechanics-of-materials, not process pressure.
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).
Related conversions
- psf → mmHgpound-force per square foot (stress) → millimetre of mercury (stress)
- Pa → psfpascal (stress) → pound-force per square foot (stress)
- psf → Papound-force per square foot (stress) → pascal (stress)
- kPa → psfkilopascal (stress) → pound-force per square foot (stress)
- psf → kPapound-force per square foot (stress) → kilopascal (stress)
- psi → psfpound-force per square inch (stress) → pound-force per square foot (stress)