how to convert atm to bar

To convert pressure from atmospheres (atm) to bars (bar), you must multiply the value in atmospheres by the conversion factor 1.01325. The conversion is based on the relationship that **1 atm = 1.01325 bar**. Therefore, the formula is: Pressure in bar = Pressure in atm x 1.01325. Since 1 atm is defined as 101,325 pascals and 1 bar is 100,000 pascals, the resulting value in bars will be slightly greater than the original value in atmospheres.