PSI to ATM Converter
Type a value in pounds per square inch to see it in standard atmospheres as you type, with the exact formula and a reference chart.
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- Atmospheres
- 2.0414 atm
How this was calculated
- 1 standard atmosphere = 14.69594878 pounds per square inch
- 30 ÷ 14.69594878 = 2.0413789 atm
| psi | atm |
|---|---|
| 1 psi | 0.068046 atm |
| 5 psi | 0.34023 atm |
| 10 psi | 0.68046 atm |
| 14.696 psi | 1 atm |
| 15 psi | 1.02069 atm |
| 20 psi | 1.36092 atm |
| 30 psi | 2.04138 atm |
| 32 psi | 2.17747 atm |
| 35 psi | 2.38161 atm |
| 50 psi | 3.4023 atm |
| 100 psi | 6.8046 atm |
| 150 psi | 10.2069 atm |
| 200 psi | 13.6092 atm |
| 500 psi | 34.023 atm |
| 1,000 psi | 68.046 atm |
| atm | psi |
|---|---|
| 0.05 atm | 0.734797 psi |
| 0.1 atm | 1.46959 psi |
| 0.2 atm | 2.93919 psi |
| 0.5 atm | 7.34797 psi |
| 1 atm | 14.6959 psi |
| 2 atm | 29.3919 psi |
| 5 atm | 73.4797 psi |
| 10 atm | 146.959 psi |
| 20 atm | 293.919 psi |
| 50 atm | 734.797 psi |
| 100 atm | 1,469.59 psi |
How to convert pounds per square inch to standard atmospheres
1 pound per square inch = 0.0680459639 standard atmospheres. To convert pounds per square inch to standard atmospheres, divide by 14.69594878 (or multiply by 0.0680459639). One psi is one pound-force on one square inch, exactly 6,894.757293168 Pa. One standard atmosphere is exactly 101,325 pascals (101.325 kPa), roughly the air pressure at sea level.
Worked examples
- 14.696 pounds per square inch = 1 atm (14.696 ÷ 14.695949)
- 30 pounds per square inch = 2.04138 atm (30 ÷ 14.695949)
- 100 pounds per square inch = 6.8046 atm (100 ÷ 14.695949)
Where this conversion comes up
Pounds per square inch are used for tire pressure, compressors and plumbing in the US; standard atmospheres for chemistry, gas laws and diving. Chemistry and diving problems ask for pressure in atmospheres, while gauges and compressors read psi. One standard atmosphere is 14.696 psi, so a 30 psi tire is about 2.04 atm. Gauge psi excludes the atmosphere itself; absolute pressure adds about 14.7 psi.
Quick estimate
Divide by 15 (2% high): 60 psi ≈ 4 atm, exact 4.08 atm.
Common mistakes
- Multiplying instead of dividing. A standard atmosphere is larger than a pound per square inch, so the number of standard atmospheres must come out smaller: 14.696 pounds per square inch = 1 atm.
Related pressure converters: bar to psi, psi to bar, kpa to psi, psi to kpa, mpa to psi, psi to mpa.
Frequently asked questions
How do you convert pounds per square inch to standard atmospheres?
Multiply the pounds per square inch by 0.0680459639 (or divide by 14.69594878). For example, 30 pounds per square inch is 2.04138 standard atmospheres.
How many standard atmospheres are in one pound per square inch?
One pound per square inch is 0.0680459639 standard atmospheres. One psi is one pound-force on one square inch, exactly 6,894.757293168 Pa.
What is 100 pounds per square inch in standard atmospheres?
100 pounds per square inch is 6.8046 standard atmospheres.
Is there a quick way to estimate pounds per square inch to standard atmospheres?
Divide by 15 (2% high): 60 psi ≈ 4 atm, exact 4.08 atm.