PSI to Atm Converter
Convert pound per square inch to standard atmosphere instantly. 1 psi = 0.06804596391 atm, worked steps and a full reference table.
How to use it
- Type the value in pound per square inch — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 psi | 0.06804596391 atm |
| 5 psi | 0.3402298195 atm |
| 10 psi | 0.6804596391 atm |
| 100 psi | 6.804596391 atm |
One pound per square inch equals 0.068045964 standard atmospheres (atm). To convert pound per square inches to standard atmospheres, multiply by 0.068045964; to go back the other way, multiply by 14.695949 instead.
The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.
What pound per square inches and standard atmospheres actually measure
Pound per square inch (psi) — Pounds per square inch. Tyre pressures, air compressors and plumbing in the US.
Standard atmosphere (atm) — A standard atmosphere is 101,325 pascals — average sea-level pressure. Chemistry and diving.
PSI to Atm conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| psi | atm |
|---|---|
| 1 psi | 0.068045964 atm |
| 2 psi | 0.13609193 atm |
| 5 psi | 0.34022982 atm |
| 10 psi | 0.68045964 atm |
| 25 psi | 1.7011491 atm |
| 50 psi | 3.4022982 atm |
| 100 psi | 6.8045964 atm |
How to convert pound per square inches to standard atmospheres by hand
Multiply the number of pound per square inches by 0.068045964.
For example, 25 psi × 0.068045964 = 1.7011491 atm.
Going the other way, divide by 0.068045964 — or multiply by 14.695949, which is the same thing and easier to do in your head.
Everything runs in your browser
There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.
Questions people ask
How many atm are in 1 psi?
1 psi equals exactly 0.06804596391 atm. Multiply any value in pound per square inch by 0.06804596391 to get standard atmosphere.
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Last updated 18 August 2026