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About this tool
Convert atmospheres to psi instantly. Free, bidirectional, and fully in-browser.
1 atmosphere equals 14.69594878 psi — enter any atmosphere value to convert it to psi instantly. This Atmosphere to Pound per square inch converter is a client-side tool: it applies a single multiplication (psi = atm × 14.69594878) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert psi back to atmospheres. A reference table lists common atmosphere values already converted, and nothing you enter is sent to a server.
Open Atmosphere to Pound per square inch Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Atmosphere field.
Read the equivalent in psi in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert psi to atmospheres.
The result updates as you type, and the swap button flips the conversion to pound per square inch → atmosphere without reloading.
The conversion uses the precise factor (psi = atm × 14.69594878), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One atmosphere is 14.69594878 psi. Multiply the atmosphere value by 14.69594878 to convert. For example, 10 atm = 146.9594878 psi.
psi = atm × 14.69594878. This tool applies it automatically and shows a worked example: 10 atm = 146.9594878 psi.
Yes. Press the swap button, or type into the pound per square inch field, and the tool converts psi to atmospheres using the inverse of the same relationship.
It uses the standard pressure definition (psi = atm × 14.69594878), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Atmosphere to Pound per square inch Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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