atm to psi Converter

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Convert atmospheres to pounds per square inch at the rate 1 atm = 14.696 psi (since 1 atm = 101,325 Pa exactly and 1 psi = 6,894.76 Pa). Anchors: 0.5 atm ≈ 7.35 psi, 2 atm ≈ 29.39 psi, 5 atm ≈ 73.48 psi, 10 atm ≈ 146.96 psi. Useful for translating chemistry-textbook atmospheric pressures into US-style psi for engineering. Browser-local.

Atmosphere (atm)
Pound per square inch (psi)

Atmosphere (atm) → Pound per square inch (psi)

Quick reference table

Atmosphere (atm)Pound per square inch (psi)
0.5 atm7.348 psi
1 atm14.6959 psi
1.5 atm22.0439 psi
2 atm29.3919 psi
5 atm73.4797 psi
10 atm146.9595 psi
50 atm734.7974 psi

Glossary

Atmosphere (atm)

A standard atmosphere is defined as exactly 101,325 Pa (= 1.01325 bar = 760 mmHg = 14.696 psi). It represents average atmospheric pressure at sea level under standard conditions. Used in chemistry (gas-law problems), high-altitude aviation references and pressure-vessel ratings. Not the same as the technical atmosphere (at, ≈ 98,066.5 Pa) — that is a separate, rarely used unit.

Pound per square inch (psi)

A pound-force per square inch equals 6,894.76 Pa. It is the dominant pressure unit in US automotive and engineering: tire pressure (32 psi = 2.21 bar), hydraulic systems (1,000–3,000 psi), bicycle tires (60–120 psi), municipal water (60 psi typical). Standard atmospheric pressure is 14.696 psi. The unit is sometimes split as psi-g (gauge, above atmospheric) and psi-a (absolute).

Metric / SI pressure

In the metric system, pressure is reported in pascals (SI base) or its multiples — kilopascal (kPa, 10³ Pa), megapascal (MPa, 10⁶ Pa) — and the related non-SI unit bar (10⁵ Pa). The millibar/hectopascal (mbar = hPa = 100 Pa) is used in meteorology. All metric units relate by exact powers of ten, so conversions between them are simple shifts of decimal point.

Imperial / US pressure

US engineering and automotive primarily report pressure in pounds per square inch (psi). 1 psi ≈ 6,894.76 Pa, defined as one pound-force per square inch. Standard atmospheric pressure is 14.696 psi. The closely related "psi-gauge" (psi-g) measures pressure above atmospheric, while "psi-absolute" (psi-a) measures total pressure including atmospheric.

Related tools

psi to atm
Convert psi to atm — 14.696 psi = 1 atm
atm to Bar
Convert atm to bar — 1 atm = 1.01325 bar exactly
atm to kPa
Convert atm to kPa — 1 atm = 101.325 kPa exactly
Pressure Converter
Convert pressure — Pa, kPa, MPa, bar, mbar, atm, mmHg, psi