atm to bar Converter - Standard Atmosphere to Bar

Standard Atmosphere (atm) to Bar (bar)

Direct answer

1 atm = 1.01325 bar

bar = atm × 1.01325

Converter

Input

atm

Result

1.01325bar

bar = atm × 1.01325

atm = bar × 0.986923266716

Example: 10 atm = 10 × 1.01325 = 10.1325 bar.

Express both atm and bar in the same base unit Pa (pascal), then cancel the shared base unit.

1
Rewrite atm in the base unit
$1 atm = 101, 325 Pa$
2
Rewrite bar in the base unit
$1 bar = 100, 000 Pa$
3
Forward conversion
$1 atm = \frac{101 , 325 Pa}{100 , 000 Pa} \times 1 bar = \frac{101 , 325}{100 , 000} bar = 1.01325 bar$
4
Reverse conversion
$1 bar = \frac{100 , 000 Pa}{101 , 325 Pa} \times 1 atm = \frac{100 , 000}{101 , 325} atm = 0.986923266716 atm$

A guarded explanation for this pair page covering definition, principle, assumptions, and cautions.

Guarded output

AI text is for interpretation only. The page calculator remains the source of truth for numeric results.

1 atm = 1.01325 bar.

10 atm = 10.1325 bar.

100 atm = 101.325 bar.

Use bar = atm × 1.01325.

1 bar = 0.986923266716 atm.

Use the conversion factor and round the result to the precision required by your calculation.