atm to psi

Convert atm to psi instantly — with a table, common pressure values, and a live calculator.

1 atm equals 14.7 psi.

Updated Open the Unit Converter →

Convert any pressure

Result (psi)14.7 psi

atm to psi table

atmpsi
1 atm14.7 psi
2 atm29.39 psi
3 atm44.09 psi
5 atm73.48 psi
10 atm146.96 psi
15 atm220.44 psi
20 atm293.92 psi
25 atm367.4 psi
30 atm440.88 psi
40 atm587.84 psi
50 atm734.8 psi
60 atm881.76 psi
75 atm1102.2 psi
90 atm1322.64 psi
100 atm1469.59 psi
120 atm1763.51 psi
150 atm2204.39 psi
200 atm2939.19 psi
250 atm3673.99 psi
300 atm4408.78 psi
400 atm5878.38 psi
500 atm7347.97 psi

psi to atm (reverse)

psiatm
1 psi0.068 atm
2 psi0.136 atm
3 psi0.204 atm
5 psi0.34 atm
10 psi0.68 atm
15 psi1.02 atm
20 psi1.36 atm
25 psi1.7 atm
30 psi2.04 atm
40 psi2.72 atm
50 psi3.4 atm
60 psi4.08 atm
75 psi5.1 atm
90 psi6.12 atm
100 psi6.8 atm
120 psi8.17 atm
150 psi10.21 atm
200 psi13.61 atm
250 psi17.01 atm
300 psi20.41 atm
400 psi27.22 atm
500 psi34.02 atm

Common pressure values

atmpsi
5 atm73.48 psi
10 atm146.96 psi
25 atm367.4 psi
50 atm734.8 psi
75 atm1102.2 psi
100 atm1469.59 psi
120 atm1763.51 psi
150 atm2204.39 psi
200 atm2939.19 psi
300 atm4408.78 psi
400 atm5878.38 psi
500 atm7347.97 psi

How it scales

367735110214700255075100atm

1 bar in other units

14.5psi100kPa1atm750mmHg

The ratio at a glance

1 atm14.7 psi

psi, bar, and pascal — the key pressure units

The pascal (Pa) is the SI unit of pressure; the kilopascal (kPa) and megapascal (MPa) are its multiples. The bar equals exactly 100,000 Pa and is close to air pressure — but beware: 1 bar is not equal to 1 atmosphere (atm), because 1 atm is 101,325 Pa (about 1.3% more). psi (pound-force per square inch) is the US unit for tire and pneumatic pressures, and mmHg (torr) is used for blood pressure and vacuum work.

Watch out for gauge vs. absolute pressure: psi values are usually gauge (psig) — that is, above ambient. Tire pressures are quoted this way. For more unit pairs, use our pressure conversion hub.

Related conversions

Frequently asked questions

How many psi are in 1 atm?

1 atm equals 14.7 psi.

How many psi are in 2 atm?

2 atm equal 29.39 psi.

How do I convert atm to psi?

Multiply the pressure in atm by 14.7 to get psi.

Is psi gauge or absolute pressure?

In practice, psi is usually gauge pressure (psig) — the pressure above ambient air. Tire and pneumatic pressures are quoted this way. Absolute pressure (psia) is measured from a vacuum and is about 14.7 psi (1 atm) higher.

What are these pressure units used for?

Pascals (Pa), kilopascals (kPa), and megapascals (MPa) are the SI units of pressure. The bar and millibar (mbar) are used in meteorology and engineering, psi mainly for tires and pneumatics (US), the atmosphere (atm) as a reference pressure, and mmHg (torr) for blood pressure and vacuum work.

Convert any unit

The unit converter handles length, volume, weight, and more.

Open Unit Converter →