Frequently Asked Questions
How many pascals are in one atmosphere?
One standard atmosphere (atm) equals exactly 101,325 pascals (Pa), which is approximately 1,013.25 hPa or 1.01325 bar.
What is psi?
PSI (Pounds per Square Inch) is a pressure unit common in the United States, used for tire pressure, water pressure, and more. One psi equals approximately 6,894.76 Pa.
What is mmHg used for?
mmHg (millimeters of mercury) is used in medicine for blood pressure measurement and in meteorology for barometric pressure. One mmHg equals approximately 133.322 Pa.
2026 international standards