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The two-letter symbol kg, the SI unit symbol for the kilogram.
Also known as: Kilo
kg is the SI symbol for the kilogram, the base unit of mass, and the only base unit whose name already contains a prefix — which is why smaller multiples are built on the gram rather than on the kilogram.
Denotes the kilogram, the SI base unit of mass.
Contexts: Mathematics
Is the only SI base unit whose name and symbol already carry a prefix, so decimal multiples are formed on the gram — milligram, microgram — rather than by stacking a second prefix onto the kilogram.
Contexts: Mathematics
Was redefined in 2019 in terms of the Planck constant, replacing the international prototype kilogram — the last physical artefact any SI unit depended on.
Contexts: Mathematics
Two lower-case Latin letters side by side: a k with a vertical stem and two diagonal strokes, followed by a g with a round bowl and a descending tail.