Cake Serving Calculator

How Much Cake Do You Need?

Party size depends on guest count, cake shape, and slice size. This calculator estimates the round, square, or sheet cake you should order or bake. Use it with the Cake Pricing Calculator and Baking Pan Size Converter.

Slice Area Method

Multiply guest count by slice area to get the top surface you need. For a round cake, diameter comes from $A = \pi (d/2)^2$. For a square cake, side length is $\sqrt{A}$.

Sheet Cake Sizes

Common sheet sizes are quarter (13" × 9"), half (18" × 13"), and full (26" × 18"). The tool picks the smallest sheet that fits your guest count at the slice size you choose.

Two-Tier Recommendation

For larger parties, a single round layer can become very wide. When guest count reaches about 50 or the recommended diameter hits 14 inches, the calculator suggests a two-tier cake instead.