Cake Serving Calculator

Calculate cake servings by shape, size, and layers. See frosting amount.

By Konstantin Iakovlev · Updated September 2026 · Source: Wilton — Cake Serving Chart

Cake Shape

Servings

26

Frosting

~8.0 cups

Cake Details

Estimated Servings26
Layers2
Frosting Needed~8.0 cups

Use the Cake Serving Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only. Results are estimates based on the information you provide and the assumptions described on this page.

How It Works

Slice counts depend on three things: the cake's shape, its overall size, and how many layers it stacks. Pin those down and you can match the bake to your guest list instead of guessing, which keeps you from coming up short or staring at a pile of leftovers after the party.

The calculator starts from a serving count for a single layer: 10 for an 8-inch round, 16 for a 10-inch, 24 for a 12-inch and 36 for a 14-inch, and sheet cakes work the same way from their own quarter, half and full-sheet counts. Two layers multiply that count by 1.6 and three layers by 2.2, rounded to a whole serving. The frosting figure is a rough allowance that grows with the diameter (or sheet size) and the number of layers, not a surface-area calculation.

Your own serving style shifts the result. Cut generous home-style wedges and the same cake feeds fewer people than the chart suggests. It also pays to subtract the area taken up by decorations or non-edible toppers, since that surface can't be served. Sizing the cake too large is what most often leaves food going to waste.

Example: Servings for a 2-Layer 10-Inch Round Cake

  1. 1 Input: Shape = Round, Round Size = 10 inch, Layers = 2.
  2. 2 Calculation: one 10-inch layer counts as 16 servings, and two layers multiply that by 1.6: 16 × 1.6 = 25.6, which rounds to 26 servings.
  3. 3 Result: the calculator shows 26 servings for the cake.
  4. 4 Context: Wilton's serving chart lists 28 party servings (slices about 1½ × 2 inches) for a 10-inch round baked 4 inches high in two layers, so the estimate sits close to that. Cut thinner wedding-style slices of about 1 × 2 inches and Wilton counts 38 from the same cake.

Source: Wilton — Cake Serving Chart · Last updated: September 2026

Frequently Asked Questions

How many servings in a 9-inch round cake?
A single-layer 9-inch round cake yields about 12 party servings (sliced into thin wedges) or 8 generous dessert servings. A two-layer 9-inch cake doubles to about 24 party servings.
What size cake do I need for 50 guests?
A three-tier cake (6-inch, 9-inch, and 12-inch rounds, each two layers) yields about 66 party servings. Alternatively, a single half-sheet cake (18x12 inches) provides about 48 servings.
How much frosting do I need for a two-layer cake?
A two-layer 9-inch cake needs about 4-5 cups of frosting for filling and a smooth exterior coat. If piping decorations, add an extra cup. One standard buttercream recipe yields about 5 cups.

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