Unit of mass: kilogram (kg)
|||The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10−34 when expressed in the unit J s, which is equal to kg m2 s−1, where the metre and the second are defined in terms of c and ∆νCs.|
Information on the practical realisation of the definition of the kilogram can be found in the Mise en pratique for the definition of the kilogram in the SI.
Unit of pressure: pascal (Pa)
Pressure is the amount of force applied perpendicular to the surface of an object per unit area and the for it is p (or P).
The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m2, or kg·m−1·s−2). Pascal is a so-called coherent derived unit in the SI with a special name and symbol.
Calibration services for mass and pressure