## Wikipedia - Litro litre

https://doi.org/10.1351/goldbook.L03594
Non-SI unit of volume, $$\text{L} = 10^{-3}\ \text{m}^{3}$$. The other allowed symbol is $$\mathrm{l}$$.
Source:
Green Book, 2nd ed., p. 111 [Terms] [Book]