atm to bar Converter
Convert atm to bar instantly: 1 atm = 1.01325 bar. Free converter with the formula, a reference table and FAQs — no sign-up.
| atm | bar |
|---|
How to convert atm to bar
Enter your value
Type the number of atm you want to convert into the left box. The result in bar appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — bar to atm. Your current value carries across so you don't have to re-enter anything.
About atm and bar
atm and bar are both pressure. Use this converter to switch between them instantly.
Worked examples: atm to bar
Multiply the atm value by 1.01325 to get bar. A few quick examples:
- 5 atm × 1.01325 = 5.06625 bar
- 25 atm × 1.01325 = 25.3313 bar
- 250 atm × 1.01325 = 253.312 bar
Related conversions
1 atm = 1.01325 bar. For most practical purposes, 1 atm ≈ 1 bar (0.01325 bar difference). SCUBA and industrial gas cylinders are rated in bar; diving tables use atmospheres absolute (ATA). A full scuba cylinder: 200-300 bar = 198-297 atm.
| atm | bar |
|---|---|
| 0.1 | 0.1013 |
| 0.5 | 0.5066 |
| 1 | 1.013 |
| 1.5 | 1.52 |
| 2 | 2.026 |
| 3 | 3.04 |
Frequently asked questions
How do I convert atm to bar?
To convert atm to bar, multiply by 1.01325. Or use the calculator above for instant results.
How many bar are in 1 atm?
1 atm equals 1.01325 bar.
Is the atm to bar converter free?
Yes, the atm to bar converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.