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Atmosphere to Bar

Convert atm to bar quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.

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CONVERTED RESULT—
Decimal places
CONVERSION RULE

1 atm equals approximately 1.01325 bar.

How to use the Atmosphere to Bar

  1. Enter the number you want to convert.
  2. Confirm the source unit shown beside the input.
  3. Choose decimal precision if you need more or less detail.
  4. Read the converted result.
  5. Copy the result when you need to use it elsewhere.

How the conversion works

1 atm equals approximately 1.01325 bar.

For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.

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Common atm to bar conversions

atmbar
1 atm1.01325 bar
2 atm2.0265 bar
5 atm5.06625 bar
10 atm10.1325 bar
20 atm20.265 bar
50 atm50.6625 bar

Example

For example, entering 1 atm gives approximately 1.01325 bar using the rule above. Change the input to test your own value.

Frequently asked questions

The Atmosphere to Bar converts a value from atm to bar using the conversion relationship described on this page.
Enter your value, review the source and destination units, choose the decimal precision and read or copy the result.
1 atm equals approximately 1.01325 bar.
Use enough precision for your purpose. Everyday estimates usually need fewer decimal places; technical work may require more.
It can be a useful reference calculation, but safety-critical, regulated, contractual or specialized work should be verified against the applicable authoritative standard.

Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.

Page reviewed: August 24, 2026.