I have five orchids total. Cattlianthe Secret Love (3" pot), a Cattleya walkeriana (5"pot), Rlc. Hsinying scarlet (3 cup plastic tub) and the two NoID Phals (one regular size 5 " pot and the new mini).
I don't really keep track on how much I use for the plants since there is several other types plants about the house besides the orchids.