# PSI to atm Converter URL: https://speedycalculator.com/calculators/conversion/psi-to-atm/ Last updated: 2026-10-25 > Convert psi (psi) to standard atmospheres (atm): 1 pound per square inch = 0.068045964 atm, so multiply by 0.068045964 or divide by 14.695949. Both fields are editable, so you can also type in standard atmospheres and get psi back. ## Inputs - Psi (psi) ## Results - Standard atmospheres ## Formula ``` 1 psi = 0.068045964 atm 1 atm = 14.695949 psi atm = psi × 0.068045964 ``` ## Explanation 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 PsiStandard atmospheresStandard atmospheresPsi1 psi0.068045964 atm1 atm14.695949 psi10 psi0.68045964 atm2 atm29.391898 psi14.696 psi1.0000035 atm5 atm73.479744 psi30 psi2.0413789 atm10 atm146.95949 psi50 psi3.4022982 atm20 atm293.91898 psi100 psi6.8045964 atm50 atm734.79744 psi1,000 psi68.045964 atm100 atm1,469.5949 psi3,000 psi204.13789 atm1,000 atm14,695.949 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. ## Worked example Inputs — Psi: 14.696 psi. Results — **Standard atmospheres = 1.00000349 atm**. ## FAQ **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. ## Sources - [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811) - [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)