When making a chocolate sponge cake how much mixture should be in the tins?

How much needs to be in the tins? Should I fill all the way up or just a little bit at the bottom?When making a chocolate sponge cake how much mixture should be in the tins?
half the tin to allow to rise an cook properlyWhen making a chocolate sponge cake how much mixture should be in the tins?
bout 3/4 from the top..if u using self raising flour (it will rise up wen cooking) u dont want it flowing everywhere! unless u want 2 b in a gooey mess?
depending on how big the tin is.





But normally as much as you want to eat. Or half way full ish
LITTLE BIT LESS THEN HALF