Quick answer: 1 PSI (lbf/in²) in Atmosphere (atm)
1 psi equals 0.068046 atm. To convert PSI (lbf/in²) to Atmosphere (atm), multiply by 0.068046 using the free calculator above — no signup needed.
Pressure units
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About Pressure Converter
The Pressure Converter converts between 6 different units, including Pascal, Kilopascal, Bar, PSI (lbf/in²), Atmosphere (atm). The base unit is the Pascal, and every other unit on this page is defined as an exact multiple of it. Type any value into the calculator above to convert instantly — free, unlimited, no signup and nothing to install.
Common equivalents: 1 Pascal = 0.001 Kilopascal, 0.00001 Bar, 0.000145038 PSI (lbf/in²).
Scale of this category: the smallest unit is the Pascal (Pa) and the largest is the Atmosphere (atm) (atm).
Last updated: 2026-09-15
Pressure conversion factors
| Unit | Symbol | Value in Pascal |
|---|---|---|
| Pascal | Pa | 1 Pa = 1 Pa |
| Kilopascal | kPa | 1 kPa = 1000 Pa |
| Bar | bar | 1 bar = 100000 Pa |
| PSI (lbf/in²) | psi | 1 psi = 6894.76 Pa |
| Atmosphere (atm) | atm | 1 atm = 101325 Pa |
| Torr / mmHg | Torr | 1 Torr = 133.322368 Pa |
Worked Examples
See exactly how the conversion works with real numbers, step by step.
How much is 1 PSI (lbf/in²) in Atmosphere (atm)?
- Multiply 1 by the conversion factor 0.068046
- 1 PSI (lbf/in²) = 0.068046 Atmosphere (atm)
How much is 10 PSI (lbf/in²) in Atmosphere (atm)?
- Multiply 10 by the conversion factor 0.068046
- 10 PSI (lbf/in²) = 0.68046 Atmosphere (atm)
How much is 100 PSI (lbf/in²) in Atmosphere (atm)?
- Multiply 100 by the conversion factor 0.068046
- 100 PSI (lbf/in²) = 6.804596 Atmosphere (atm)
Quick Conversion Reference Table
| PSI (lbf/in²) (psi) | Atmosphere (atm) (atm) |
|---|---|
| 1 psi (PSI (lbf/in²)) | 0.068046 atm (Atmosphere (atm)) |
| 2 psi (PSI (lbf/in²)) | 0.136092 atm (Atmosphere (atm)) |
| 5 psi (PSI (lbf/in²)) | 0.34023 atm (Atmosphere (atm)) |
| 10 psi (PSI (lbf/in²)) | 0.68046 atm (Atmosphere (atm)) |
| 20 psi (PSI (lbf/in²)) | 1.360919 atm (Atmosphere (atm)) |
| 50 psi (PSI (lbf/in²)) | 3.402298 atm (Atmosphere (atm)) |
| 100 psi (PSI (lbf/in²)) | 6.804596 atm (Atmosphere (atm)) |
| 500 psi (PSI (lbf/in²)) | 34.022982 atm (Atmosphere (atm)) |
| 1000 psi (PSI (lbf/in²)) | 68.045964 atm (Atmosphere (atm)) |
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How to Use This Converter
- Enter your value
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FAQ
How much is 1 PSI (lbf/in²) in Atmosphere (atm)?
1 PSI (lbf/in²) = 0.068046 Atmosphere (atm).
How do I convert PSI (lbf/in²) to Atmosphere (atm)?
Enter your value in PSI (lbf/in²) into the converter above and the result in Atmosphere (atm) appears instantly. 1 psi equals 0.068046 atm — just multiply your value by 0.068046.
What is the formula for PSI (lbf/in²) to Atmosphere (atm)?
The formula is: value in Atmosphere (atm) = value in PSI (lbf/in²) × 0.068046. For example, 10 psi × 0.068046 = 0.68046 atm.
Is this PSI (lbf/in²) to Atmosphere (atm) converter free and accurate?
Yes. This PSI (lbf/in²) to Atmosphere (atm) converter is 100% free, uses the exact international conversion factor (0.068046), and works on any device with no signup.
How do I convert Atmosphere (atm) back to PSI (lbf/in²)?
To convert back, divide by 0.068046 (or multiply by 14.695949). You can also use our dedicated How Many PSI (lbf/in²) in 1 Atmosphere (atm)? page for instant results.
Do I need to download an app or sign up?
No. The converter runs entirely in your browser — nothing to install, no account, no fees. It even keeps working offline once the page has loaded.
Which Pressure units are supported?
This converter supports 6 units: Pascal, Kilopascal, Bar, PSI (lbf/in²), Atmosphere (atm), Torr / mmHg.