Pressure
psftoatm
Convert pounds-force per square foot (psf) to standard atmospheres (atm).
Factor1 psf = 0.0004725414 atm
Converter
psf
Accepts numbers or expressions, e.g. 150 + 14.7
Result
atm
Rendered to 6 significant figures.
Formula
Formula
atm = psf × 0.0004725414
Multiply any value in pounds-force per square foot by 0.0004725414 to obtain the value in standard atmospheres.
Worked example
Convert 2116 psf to atm.
- 01Start with 2116 psf.
- 02Multiply by the conversion factor: 2116 × 0.0004725414 = 0.999898 atm.
Result2116 psf = 0.999898 atm
Conversion table
| psf | atm |
|---|---|
| 1 | 0.00047254 |
| 2 | 0.00094508 |
| 5 | 0.0023627 |
| 10 | 0.0047254 |
| 20 | 0.0094508 |
| 50 | 0.023627 |
| 100 | 0.047254 |
| 200 | 0.094508 |
| 500 | 0.23627 |
| 1000 | 0.47254 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from psf to atm?
1 psf equals 0.0004725414 atm. To convert, multiply the value in pounds-force per square foot by 0.0004725414.
How do I convert 1 psf to atm?
1 psf = 0.000472541 atm. For any value, multiply by 0.0004725414.
How do I convert atm back to psf?
Divide by the same factor — or equivalently, multiply by 2116.217. So 1 atm = 2116.22 psf.
When would I need to convert pound-force per square foot to standard atmosphere?
Pressure conversions between psf and atm 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).