Atmospheres to Psi
Type a value in either box to convert between atmospheres and psi. The factor is 14.6959.
| Atmospheres | Psi |
|---|---|
| 1 atm | 14.695949 psi |
| 2 atm | 29.391898 psi |
| 3 atm | 44.087846 psi |
| 5 atm | 73.479744 psi |
| 10 atm | 146.959488 psi |
| 25 atm | 367.398719 psi |
| 50 atm | 734.797439 psi |
| 100 atm | 1469.594878 psi |
How to use
- Enter a value in the Atmospheres field.
- The Psi figure appears immediately — no button to press.
- Typing in the Psi field converts back to Atmospheres the same way.
- Use the reference table for the values that come up most often.
Atmospheres to Psi formula
Converting atmospheres to psi is a single multiplication by 14.6959488.
psi = atm × 14.6959488
Why this factor: the atmosphere and the pound per square inch are both defined against the pascal, so dividing one definition by the other gives 14.6959488 directly. Both definitions are set out in full below.
To go the other way, divide by 14.6959488 — or use the Psi to Atmospheres converter, which is the same calculation reversed.
Worked example
Given 760 atm, multiplying by 14.6959488 yields 11168.921069 psi.
760 atm × 14.6959488 = 11168.921069 psi
The converter above does this for any value you type, in either direction.
What is an atmosphere?
A standard atmosphere is a fixed reference pressure, originally average sea-level air pressure.
Definition: Defined as exactly 101,325 pascals — an exact convention, not a measurement.
Where it is used: Chemistry reference conditions, diving pressure, and high-pressure physics.
What is a pound per square inch?
Pounds per square inch is the standard pressure unit in the United States.
Definition: One pound-force per square inch, which is about 6,894.757 pascals.
Where it is used: US tire pressure, compressed air and hydraulic systems, and plumbing water pressure.
Atmospheres vs Psi
The atmosphere is a specialized unit while the pound per square inch is a US customary unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many psi are in an atmosphere?
One atmosphere equals 14.6959488 psi.
What is the formula to convert atmospheres to psi?
Multiply the number of atmospheres by 14.6959488. To reverse it, divide by 14.6959488 instead.
How do I convert psi back to atmospheres?
Divide by 14.6959488, which is the same as multiplying by 0.0680459639.
How many psi are in 10 atmospheres?
10 atm works out to 146.959488 psi.
How is the atmosphere defined?
Defined as exactly 101,325 pascals — an exact convention, not a measurement.