Atmosphere to Bar Pressure Converter
Convert Atmosphere (atm) to Bar (bar) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
Bar to Atmosphere (bar to atm) ►
How to convert Atmosphere to Bar
1 atm = 101,325 Pa
1 bar = 100,000 Pa
1 atmosphere (atm) is equal to 1.01325 bar (bar).
bar = atm × 1.01325
Multiply the pressure in atmospheres by 1.01325:
Example: Convert 1 atm to bar:
bar = 1 × 1.01325 = 1.01325 bar
What is a Atmosphere?
The Atmosphere (atm) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Bar?
The Bar (bar) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts pressure from Atmosphere into Bar. One atm equals 1.01325 bar.
Atmosphere to Bar conversion table
Common atm values and the matching bar result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Atmosphere (atm) | Bar (bar) |
|---|---|
| 0.5 atm | 0.506625 bar |
| 1 atm | 1.01325 bar |
| 2 atm | 2.0265 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 100 atm | 101.325 bar |
How this calculator works
The form on this page is a Atmosphere-to-Bar converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the bar result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many bar are in 1 atm?
1 atm = 1.01325 bar.
How do I convert Atmosphere to Bar?
Multiply the pressure in atmospheres by 1.01325:
Is this atm to bar converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.