Cake Serving Calculator — What Size Cake for N People
~30 seconds
Enter your guest count, pick a pan shape and size, and choose a slice style. The calculator uses Wilton serving conventions (party slice 1.5×2 in, wedding slice 1×2 in) to estimate servings per cake, then tells you how many cakes you need. Servings are planning estimates — slice size varies by cutter.
What this calculator determines
It estimates how many cakes you need for a guest count using Wilton serving counts per pan, adjusted for party or wedding slice style, and rounds up.
Related calculators
Examples
30 guests, 9×13 sheet, party
30 guests, 9×13 sheet, party slice (36 servings)
Calculation
- Servings per cake = 36
- Cakes = ceil(30 ÷ 36) = 1
1 cake (36 servings) covers 30 guests
Assumptions & Conventions
- Wilton reference chart
- Servings per pan come from the Wilton Cake Baking and Serving Guide (party slice 1.5×2 in, wedding slice 1×2 in for a 4-inch-high cake), not an exact physical result.
- Party vs wedding slice style
- Wedding slices are smaller than party slices, so the same pan yields more wedding servings; pick the style that matches your event.
- Slice size varies by cutter
- Servings are planning estimates; actual count varies with how the cake is cut, and cakes under 3 inches high yield about half.