📏 PSI to Atmospheres Converter
Convert psi (psi) to atmospheres (atm) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 pound per square inch (psi) = 0.068045964 atmospheres (atm). Formula: atm = psi × 0.068045964.
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PSI to Atmospheres Converter inputs
Result
PSI to Atmospheres conversion table
| PSI (psi) | Atmospheres (atm) |
|---|---|
| 0.1 psi | 0.0068045964 atm |
| 0.5 psi | 0.034022982 atm |
| 1 psi | 0.068045964 atm |
| 2 psi | 0.13609193 atm |
| 3 psi | 0.20413789 atm |
| 5 psi | 0.34022982 atm |
| 10 psi | 0.68045964 atm |
| 20 psi | 1.3609193 atm |
| 25 psi | 1.7011491 atm |
| 50 psi | 3.4022982 atm |
| 100 psi | 6.8045964 atm |
| 1,000 psi | 68.045964 atm |
Other pressure conversions
How to convert psi to atmospheres
Multiply the number of psi by 0.068045964 to get atmospheres: atm = psi × 0.068045964.
Example: 5 psi = 0.34022982 atm.
The pound per square inch (psi) and the atmosphere (atm) are both units of pressure. Need the opposite direction? Use the atm to psi converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many atmospheres are in a pound per square inch?
1 pound per square inch = 0.068045964 atmospheres.
How do I convert psi to atmospheres?
Use the formula atm = psi × 0.068045964. For example, 5 psi = 0.34022982 atm.
How do I convert atmospheres back to psi?
1 atmosphere = 14.695949 psi. Use the atm to psi converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.