Psi to Atm Converter
Convert psi to atmospheres easily. Free psi to atm converter for pressure calculations.
Formula
atm = PSI × 0.068046
Common Conversions
How to Convert PSI to Atmosphere
1 psi = 0.0680 atm. Divide psi by 14.696 to get atm. So 100 psi ÷ 14.696 = 6.80 atm. Useful in scientific contexts and scuba diving where atmosphere units are standard.
A 50 psi tyre = 3.40 atm. A 150 psi air compressor = 10.21 atm. Automotive and industrial pressure ratings commonly use psi; converting to atm for scientific calculations or international comparisons. Atm is conceptually clearer for absolute pressure (multiples of sea-level atmospheric pressure).
Common PSI to ATM
| PSI | Atmosphere |
|---|---|
| 1 psi | 0.068 atm |
| 14.7 psi | 1 atm |
| 30 psi | 2.04 atm |
| 50 psi | 3.40 atm |
| 100 psi | 6.80 atm |
| 150 psi | 10.21 atm |
| 200 psi | 13.61 atm |
| 500 psi | 34.02 atm |
Frequently Asked Questions
How does scuba diving use these?
1 atm of pressure per 10 metres of seawater depth. So 30 metres = 4 atm absolute pressure (1 from atmosphere + 3 from water). Diving tanks typically rated 200-300 bar (2,940-4,410 psi) or 200-300 atm at full charge. Diving computers track depth and translate to pressure for safety.
What pressure do car tyres need?
Typical: 30-35 psi (2.04-2.38 atm). Truck tyres: 50-60 psi (3.40-4.08 atm). Bicycle road bike: 100-130 psi (6.80-8.85 atm). Mountain bike: 30-50 psi (2.04-3.40 atm). Always check the manufacturer's specification on the door jamb or owner's manual.
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