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Bar to Atmosphere

Convert bar (bar) to atmosphere (atm) — with the exact factor, a quick-reference table and a free converter that works offline.

1 bar = 0.9869233 atm

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Open the free converter with this conversion pre-loaded — no sign-up, works offline after first load.

Conversion table

Bar (bar)Atmosphere (atm)
1 bar0.9869233 atm
2 bar1.973847 atm
5 bar4.934616 atm
10 bar9.869233 atm
20 bar19.73847 atm
50 bar49.34616 atm
100 bar98.69233 atm
500 bar493.4616 atm

How the conversion works

Both units measure pressure. One bar equals exactly 0.9869233 atm, so multiply by that factor to convert.

FAQ

How many atmospheres in a bar?

1 bar = 0.9869233 atm.

How do I convert bar to atmosphere?

Multiply the bar value by 0.9869233. For example, 10 bar × 0.9869233 = 9.869233 atm.

Where does the factor come from?

The conversion factor is defined in BIPM SI Brochure; both units are pressure units converted through pascal.

Related conversions

Atmosphere to Bar Bar to Pound / in² Pound / in² to Bar Kilopascal to Pound / in²

Conversion factors: BIPM SI Brochure. Computed by the same engine that powers the app.

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