How to convert Millimeter of mercury to Atmosphere

Conversion factor and calculation steps from Millimeter of mercury (mmHg) to Atmosphere (atm).

Conversion logic

Each unit is defined via the base unit (pascal (Pa)). The value is first converted to the base unit, then to the selected unit.

1 mmHg = 133.322387415 Pa

1 atm = 101325 Pa

1 mmHg × 133.322387415 = 133.322387415 Pa

133.322387415 Pa ÷ 101325 = 0.00131578966114 atm