1mmHg is equivalent to 0.00131578955679atm. Therefore 1.5atm is equivalent to 1140mmHg
You can use this online calculator to convert atm to mmHg shared by Convertunits.com.
An atmosphere (atm) is a unit of pressure based on the average atmospheric pressure at sea level. The actual atmospheric pressure depends on many conditions, e.g. altitude and temperature.
The millimeter of mercury (mmHg) is defined as the pressure exerted at the base of a column of fluid exactly 1 millimeter (mm) high, and the fluid density is exactly 13.5951 gram per cubic centimeter (g/㎤), at a physical location where the gravity acceleration is exactly 9.80665 m/sec ².
Tip! Want to learn on how to convert between Units of Pressure: atm, mmHg and kPa manaually? Visit Chemteam.info.