Pounds per Square Inch to Standard Atmospheres Converter
1 pound per square inch ≈ 0.0680459639 standard atmospheres
1 pound per square inch equals 0.068046 standard atmospheres
How to convert pounds per square inch to standard atmospheres
Unit conversion preserves the pressure reference. Gauge pressure and absolute pressure are different readings; changing between them also needs the ambient pressure. Mercury and water-column units use the conventions stated in their unit notes.
atm = psi × 0.06804596391One pound per square inch is 0.06804596391 standard atmospheres, so a single multiplication converts any value.
0.68046 atm ≈ 10 × 0.06804596391Pounds per square inch to standard atmospheres conversion table
Common values in pounds per square inch, converted to standard atmospheres.
| Pounds per square inch (psi) | Standard atmospheres (atm) |
|---|---|
| 1 | 0.068045964 |
| 2 | 0.13609193 |
| 3 | 0.20413789 |
| 4 | 0.27218386 |
| 5 | 0.34022982 |
| 10 | 0.68045964 |
| 20 | 1.3609193 |
| 25 | 1.7011491 |
| 50 | 3.4022982 |
| 100 | 6.8045964 |
| 250 | 17.011491 |
| 500 | 34.022982 |
| 1,000 | 68.045964 |
About these units
pound per square inchpsi
One pound-force per square inch. The US standard for tyre and fluid pressure.
standard atmosphereatm
Exactly 101,325 pascals, the defined standard sea-level pressure.
Reference: CGPM 1954.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.