Cake Servings Calculator
Written by Mustapha B. · Updated August 13, 2026
Pick your cake’s shape, size and slice style to see how many people it serves, from casual party slices to slim wedding portions.
Approximate servings
How many people does a cake serve?
Servings depend on the cake’s surface area and how big each slice is. Casual party slices are about 2×2 inches; formal event slices about 1.5×2; and the classic wedding slice is a slim 1×2 inches, which is why wedding cakes “serve” far more people than they look.
Round cake servings (party slices)
| Round cake | Party | Wedding |
|---|---|---|
| 6-inch | ~7 | ~14 |
| 8-inch | ~12 | ~25 |
| 9-inch | ~16 | ~32 |
| 10-inch | ~19 | ~39 |
| 12-inch | ~28 | ~56 |
For tiered cakes, add the servings of each tier together.
Frequently asked questions
How many does a 9-inch round cake serve?
A 9-inch round serves about 16 party slices (2×2 in) or up to ~32 thin wedding slices (1×2 in).