I was taught that a good rule of thumb was this:
8" cake needs 800 grams of fondant to cover
12" cake would need 1200 grams of fondant to cover
16" cake would need 1600 grams to cover it
There are 500 grams to a lb. So 1600 + 1200 + 800 = 3600
3600 divided by 500 = 7.2
So I would estimate that you would need 7.2 lbs of fondant to cover all 3 cakes.
I always like to have extra so I’d be sure to have 7.5 – 8 lbs on hand, in the appropriate colour(s).
I hope this makes sense. Sorry for the math lesson. But this easy method for calculating has never failed me.
If your tiers are taller than the standard 4" add a bit extra. If your tiers are double barrel add each tier as 2 cakes.
Good luck and have an awesome day.
Teri, Ontario, Canada http://www.TeriLovesCake.ca
