Convert psi to atmospheres
Converting psi to atmospheres is a common pressure task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 psi equals 0.068046 atm, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert psi to atmospheres
To convert psi to atmospheres, multiply the number of psi by 0.068046. For example, 10 psi × 0.068046 = 0.68046 atm.
atm = psi × 0.068046
- Write down the value in psi you want to convert.
- Multiply it by 0.068046 (the exact psi→atm factor).
- The result is your value in atmospheres. Check it below with the converter or the table.
Conversion table
Common values of psi and their equivalents in atmospheres:
| psi | atm |
|---|---|
| 1 | 0.068046 |
| 2 | 0.136092 |
| 3 | 0.204138 |
| 4 | 0.272184 |
| 5 | 0.34023 |
| 10 | 0.68046 |
| 20 | 1.36092 |
| 25 | 1.70115 |
| 50 | 3.4023 |
| 100 | 6.8046 |
| 250 | 17.0115 |
| 500 | 34.023 |
About these units
PSI (psi). Pounds per square inch (psi) is the US customary pressure unit, one pound-force applied to one square inch. Tire gauges, compressed air and hydraulics in the US are measured in psi.
Atmosphere (atm). One standard atmosphere is defined as exactly 101,325 pascals, the reference average pressure of Earth's atmosphere at sea level. It anchors chemistry and gas-law calculations.
Frequently asked questions
How do I convert psi to atmospheres?
To convert psi to atmospheres, multiply the number of psi by 0.068046. For example, 10 psi × 0.068046 = 0.68046 atm. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many atmospheres are in 1 psi?
1 psi = 0.068046 atm. That is the fixed relationship used by this converter and by international standards.
How many psi are in 1 atmosphere?
1 atm = 14.6959 psi. If you are converting in the opposite direction, use our Atmosphere to PSI converter for the dedicated table and FAQ.
Is the psi to atmospheres conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.068046 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is psi used for?
Pounds per square inch (psi) is the US customary pressure unit, one pound-force applied to one square inch. Tire gauges, compressed air and hydraulics in the US are measured in psi.