📏 Atmospheres to Bar Converter
Convert atmospheres (atm) to bar (bar) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 atmosphere (atm) = 1.01325 bar (bar). Formula: bar = atm × 1.01325.
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Atmospheres to Bar Converter inputs
Result
Atmospheres to Bar conversion table
| Atmospheres (atm) | Bar (bar) |
|---|---|
| 0.1 atm | 0.101325 bar |
| 0.5 atm | 0.506625 bar |
| 1 atm | 1.01325 bar |
| 2 atm | 2.0265 bar |
| 3 atm | 3.03975 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 20 atm | 20.265 bar |
| 25 atm | 25.33125 bar |
| 50 atm | 50.6625 bar |
| 100 atm | 101.325 bar |
| 1,000 atm | 1,013.25 bar |
Other pressure conversions
How to convert atmospheres to bar
Multiply the number of atmospheres by 1.01325 to get bar: bar = atm × 1.01325.
Example: 5 atm = 5.06625 bar.
The atmosphere (atm) and the bar (bar) are both units of pressure. Need the opposite direction? Use the bar to atm converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many bar are in a atmosphere?
1 atmosphere = 1.01325 bar.
How do I convert atmospheres to bar?
Use the formula bar = atm × 1.01325. For example, 5 atm = 5.06625 bar.
How do I convert bar back to atmospheres?
1 bar = 0.98692327 atmospheres. Use the bar to atm converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.