977a7327_Si_units____Anthology_of_Ideas__Notes
[Name] Mass [Abbreviation (Symbol)] m, M (when used with measurements in meters) [Standard Unit] Kilogram (kg) [Notes] 
A kilogram is defined as the weight of a specific platinum-iridium cylinder
Units in Physics (mechanical, electricity, magnetism, light and optics) including Si units. | Anthology of Ideas
Notes