One standard atmosphere is about 14.696 psi. Divers and gas-cylinder users compare gauge readings with atmospheric pressure this way.
How to use the PSI to atm Converter
- Type the number of psi into the Psi field. Decimals such as 7.348 are fine.
- Read the answer in Standard atmospheres – it updates as you type, with no button to press.
- To convert the other way, type into Standard atmospheres and the psi are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only psi ⇄ atm. Need a different unit? Use the general pressure converter, where you can choose any “from” and “to” unit.
How it works
Both units measure pressure, so they are always in the same ratio: one pound per square inch equals 0.068045964 standard atmospheres. The calculator multiplies the number of psi you type by 0.068045964 to give standard atmospheres, and when you type into the standard atmospheres field it divides by the same factor to give psi. Because the ratio never changes, doubling the psi always doubles the standard atmospheres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert psi to standard atmospheres
- Write down the value in psi, for example 14.696 psi.
- Multiply by the conversion factor 0.068045964 (because 1 pound per square inch = 0.068045964 atm).
- 14.696 × 0.068045964 = 1.0000035 atm.
- To go back from standard atmospheres to psi, divide by 0.068045964 – or multiply by 14.695949.
psi to atm conversion table
| Psi | Standard atmospheres | Standard atmospheres | Psi |
|---|---|---|---|
| 1 psi | 0.068045964 atm | 1 atm | 14.695949 psi |
| 10 psi | 0.68045964 atm | 2 atm | 29.391898 psi |
| 14.696 psi | 1.0000035 atm | 5 atm | 73.479744 psi |
| 30 psi | 2.0413789 atm | 10 atm | 146.95949 psi |
| 50 psi | 3.4022982 atm | 20 atm | 293.91898 psi |
| 100 psi | 6.8045964 atm | 50 atm | 734.79744 psi |
| 1,000 psi | 68.045964 atm | 100 atm | 1,469.5949 psi |
| 3,000 psi | 204.13789 atm | 1,000 atm | 14,695.949 psi |
What is a pound per square inch?
Pounds per square inch is the pressure of one pound-force on one square inch, about 6,895 Pa. U.S. tyre gauges, compressors and hydraulic equipment read psi.
What is a standard atmosphere?
The standard atmosphere is exactly 101,325 Pa, the average air pressure at sea level. Chemistry problems and diving depth calculations often use atm.
Quick mental conversion
For a fast estimate, multiply psi by about 0.068 to get standard atmospheres; the error is about 0.1%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Mixing gauge pressure (psig, barg) with absolute pressure (psia, bara), treating bar and atm as identical, and confusing kgf/cm² with bar.
Formula
1 psi = 0.068045964 atm1 atm = 14.695949 psiatm = psi × 0.068045964Worked example
Inputs — Psi: 14.696 psi.
Results — Standard atmospheres = 1.00000349 atm.
Frequently asked questions
How many psi in 1 atm?
About 14.696 psi.
How many atm is 100 psi?
About 6.8 atm.
How do I convert psi to standard atmospheres?
Multiply the number of psi by 0.068045964. For example, 14.696 psi × 0.068045964 = 1.0000035 atm.
How do I convert standard atmospheres back to psi?
Divide by 0.068045964 (or multiply by 14.695949), or simply type the value into the standard atmospheres field above.
What is 10 psi in standard atmospheres?
10 psi = 0.68045964 atm.
What is 100 psi in standard atmospheres?
100 psi = 6.8045964 atm.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between psi and standard atmospheres. To pick any pressure unit, use the general pressure converter linked under Related calculators.
What formula does the PSI to atm Converter use?
1 psi = 0.068045964 atm.