Sheet Cake Servings Calculator
Count exactly how many servings a quarter, half or full sheet cake yields — by slice size, with the cutting grid to get there.
How it works
Columns = ⌊pan width ÷ slice width⌋ · Rows = ⌊pan length ÷ slice length⌋ · Servings = columns × rows
A single-layer sheet cake is cut on a grid, so the servings are just how many slices fit across the width times how many fit down the length. Wedding-style 1 × 2-inch slices roughly double the count of standard 2 × 2-inch party slices from the same pan. Because you can only fit whole slices, the real yield is the floor of each division, not the raw area.
Worked example
A half sheet is 12 × 18 inches. With 2 × 2-inch party slices you get 6 columns × 9 rows = 54 servings; switch to 1 × 2-inch wedding slices and the same pan yields 12 × 9 = 108.
Frequently asked questions
How many people does a half sheet cake feed?
About 54 with standard 2 × 2-inch party slices, and up to roughly 108 with thin 1 × 2-inch wedding-style cuts. Generous dessert slices bring it down to around 36.
What are quarter, half and full sheet sizes?
Home quarter sheets are about 9 × 13 inches, half sheets 12 × 18, and full sheets 18 × 26. Bakery pans can run an inch or two larger, which adds a few servings.
Are sheet cakes single or double layer?
Most sheet cakes are a single tall layer, which is what these party-slice counts assume. A torted or double-layer sheet holds the same number of slices but each is taller and richer.
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This calculator is for educational purposes. Double-check important results before acting on them.