Convert psi to atmospheres

1 psi=0.06805atm

Use the converter below to change any psi value into atmospheres instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.068046

Conversion formula

Forward

atmospheres = psi × 0.06805

Reverse

psi = atmospheres × 14.6959

Example: 10 psi × 0.06805 = 0.6805 atm.

About both units

From

Pound per Square Inch

psi

Pounds per square inch equals approximately 6895 Pa. It is the dominant pressure unit in the US — tyre pressures, plumbing, compressed air. Standard US tyre pressure: 32–35 psi.

Real-world: US tyre: 32–35 psi. Water supply: 40–60 psi. SCUBA tank: 3000 psi. Car AC system: 30–200 psi.

Read full pound per square inch reference →

Atmosphere

atm

The standard atmosphere equals 101,325 pascals exactly — defined by CGPM in 1954. Represents average sea-level atmospheric pressure. Used in chemistry, aviation and engineering as a reference pressure.

Real-world: Sea-level pressure: 1 atm. Mount Everest summit: ~0.33 atm. Submarine at 100 m: ~11 atm.

Read full atmosphere reference →

Pound per Square Inch to Atmosphere conversion table

Common psi to atmospheres values for quick reference.

Pound per Square Inch (psi)	Atmosphere (atm)
1 psi	0.06805 atm
5 psi	0.3402 atm
10 psi	0.6805 atm
25 psi	1.70115 atm
50 psi	3.4023 atm
100 psi	6.8046 atm
200 psi	13.6092 atm
500 psi	34.023 atm
1,000 psi	68.046 atm
5,000 psi	340.23 atm

Tips & common mistakes

Quick tips

1 psi ≈ 6.9 kPa = 0.069 bar.
14.7 psi = 1 atm = 1.01 bar.
Most US pressure gauges show psi.

Avoid these

Setting a European tyre at 35 bar instead of 35 psi — disaster.
Confusing psi (gauge) with psia (absolute).
Using psi in scientific papers — prefer Pa or MPa.

Frequently asked questions

How many atmospheres in a pound per square inch?

One pound per square inch equals 0.06805 atmospheres.

How do I convert psi to atmospheres?

Multiply the pound per square inch value by 0.06805 to get the equivalent in atmospheres.

What is 100 psi in atmospheres?

100 psi equals 6.8046 atmospheres.

Is a pound per square inch bigger than a atmosphere?

No. 1 pound per square inch equals 0.06805 atmospheres, so one pound per square inch is smaller.

How to convert psi to atmospheres without a calculator?

Multiply by 0.07 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

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