Pressure
psftommHg
Convert pounds-force per square foot (psf) to millimetres of mercury (mmHg).
Factor1 psf = 0.3591314 mmHg
Converter
psf
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mmHg
Rendered to 6 significant figures.
Formula
Formula
mmHg = psf × 0.3591314
Multiply any value in pounds-force per square foot by 0.3591314 to obtain the value in millimetres of mercury.
Worked example
Convert 100 psf to mmHg.
- 01Start with 100 psf.
- 02Multiply by the conversion factor: 100 × 0.3591314 = 35.9131 mmHg.
Result100 psf = 35.9131 mmHg
Conversion table
| psf | mmHg |
|---|---|
| 1 | 0.35913 |
| 2 | 0.71826 |
| 5 | 1.7957 |
| 10 | 3.5913 |
| 20 | 7.1826 |
| 50 | 17.957 |
| 100 | 35.913 |
| 200 | 71.826 |
| 500 | 179.57 |
| 1000 | 359.13 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from psf to mmHg?
1 psf equals 0.3591314 mmHg. To convert, multiply the value in pounds-force per square foot by 0.3591314.
How do I convert 1 psf to mmHg?
1 psf = 0.359131 mmHg. For any value, multiply by 0.3591314.
How do I convert mmHg back to psf?
Divide by the same factor — or equivalently, multiply by 2.784496. So 1 mmHg = 2.7845 psf.
When would I need to convert pound-force per square foot to millimetre of mercury?
Pressure conversions between psf and mmHg 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).