Pressure Unit Converter | Convert between Pascal, Bar, PSI, atm and more
Online pressure unit converter supporting precise conversion between Pascal, kilopascal, bar, PSI, atmosphere, mmHg, Torr and more pressure units.
Pressure Unit Knowledge
Pressure Unit Basics
Pressure is defined as force per unit area. The SI unit of pressure is the Pascal (Pa), equal to 1 Newton per square meter (N/m²). Other common units include bar, psi, atm, and mmHg.
Common Pressure Conversions
1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi = 760 mmHg = 760 Torr. 1 bar = 100,000 Pa = 0.9869 atm = 14.504 psi. 1 psi = 6,894.76 Pa = 51.715 mmHg.
Pascal (Pa)
- The Pascal is the SI unit of pressure, named after mathematician and physicist Blaise Pascal. 1 Pa is a very small pressure
- atmospheric pressure is about 101,325 Pa. Kilopascal (kPa) and megapascal (MPa) are commonly used in engineering.
mmHg and Torr
Millimeter of mercury (mmHg) is used in medicine for blood pressure measurement. Normal blood pressure is about 120/80 mmHg. The Torr is nearly identical to mmHg (1 Torr = 133.322 Pa), named after Evangelista Torricelli.
PSI in Engineering
PSI (pounds per square inch) is widely used in the US for tire pressure, hydraulic systems, and industrial equipment. Standard tire pressure is typically 30–35 PSI. 1 psi ≈ 6,895 Pa.