Bar to Standard atmosphere Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert bar [bar] to standard atmospheres [atm] or standard atmospheres [atm] to bar [bar]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 bar [bar] ≈ 0.9869 standard atmospheres [atm]1 standard atmosphere [atm] ≈ 1.0133 bar [bar]

Convert bar to standard atmospheres

There are two simple ways to convert bar [bar] to standard atmospheres [atm]. In the first calculation method, the value in bar [bar] is divided by the rounded conversion factor of 1.0133. The second method multiplies the value in bar [bar] by the rounded conversion factor of 0.9869.

  • Standard atmospheres [atm] ≈ bar [bar] ÷ 1.0133
  • Standard atmospheres [atm] ≈ bar [bar] * 0.9869

However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of bar [bar] to standard atmospheres [atm] can be achieved using the following calculation method.

  • Standard atmospheres [atm] = bar [bar] ÷ 101,325 * 105

Convert standard atmospheres to bar

Converting standard atmospheres [atm] to bar [bar] is easy and can be done in two ways. The first method involves multiplication, in which the value in standard atmospheres [atm] is multiplied by the rounded conversion factor of 1.0133. The second variant is a division. Here, the value in standard atmospheres [atm] is divided by the rounded conversion factor of 0.9869.

  • Bar [bar] ≈ standard atmospheres [atm] * 1.0133
  • Bar [bar] ≈ standard atmospheres [atm] ÷ 0.9869

However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of standard atmospheres [atm] to bar [bar] can be achieved using the following calculation method.

  • Bar [bar] = standard atmospheres [atm] * 101,325 ÷ 105

Converter

Decimal places

How it's calculated

Factor: 
≈ 1.013
Standard atmospheres = Bar ÷ 101,325 * 105
Bar = Standard atmospheres * 101,325 ÷ 105

To all available units

Decapascals

Gigapascals

Decapascals

Megapascals

Decapascals

Millimeters of mercury

Decapascals

Newtons per square millimeter

Decapascals

Psi

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