# What is a pascal in physics?

As per the international system of units (often abbreviated to SI), the pascal is the derived unit of pressure which can be used in order to quantify several parameters such as stress, internal pressure, the Young modulus, and the ultimate tensile strength. The SI unit of pressure is named after the French mathematician, inventor, and physicist Blaise Pascal. Another unit of pressure measurement known as the standard atmosphere (denoted by the symbol ‘atm’) can be defined as 101325 Pascals. The symbol ‘Pa’ denotes the Pascal. Since pressure can be defined as the force per unit area, one Pascal can be defined as one Newton of force applied over one square meter of area. The SI base units of the pascal are kilogram.meter-1.second-2. Note that the force applied over the unit area here is applied in a perpendicular direction to the area.