Convert atmospheres to psi
Converting atmospheres to psi is a common pressure task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 atm equals 14.6959 psi, 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 atmospheres to psi
To convert atmospheres to psi, multiply the number of atmospheres by 14.6959. For example, 10 atm × 14.6959 = 146.959 psi.
psi = atm × 14.6959
- Write down the value in atmospheres you want to convert.
- Multiply it by 14.6959 (the exact atm→psi factor).
- The result is your value in psi. Check it below with the converter or the table.
Conversion table
Common values of atmospheres and their equivalents in psi:
| atm | psi |
|---|---|
| 1 | 14.6959 |
| 2 | 29.3919 |
| 3 | 44.0878 |
| 4 | 58.7838 |
| 5 | 73.4797 |
| 10 | 146.959 |
| 20 | 293.919 |
| 25 | 367.399 |
| 50 | 734.797 |
| 100 | 1,469.59 |
| 250 | 3,673.99 |
| 500 | 7,347.97 |
About these units
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.
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.
Frequently asked questions
How do I convert atmospheres to psi?
To convert atmospheres to psi, multiply the number of atmospheres by 14.6959. For example, 10 atm × 14.6959 = 146.959 psi. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many psi are in 1 atmosphere?
1 atm = 14.6959 psi. That is the fixed relationship used by this converter and by international standards.
How many atmospheres are in 1 psi?
1 psi = 0.068046 atm. If you are converting in the opposite direction, use our PSI to Atmosphere converter for the dedicated table and FAQ.
Is the atmospheres to psi conversion exact?
Yes. Both units are defined by international agreement, so the factor of 14.6959 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is atmosphere used for?
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.