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Cake Serving Calculator

rect only

Result

Servings14
Serving StyleParty (standard)
↗ Food

Cake Serving Calculator Calculate how many servings a cake will yield based on its size, shape, and serving size. — free online calculator.

Formula

Round: servings = 2πr ÷ slice width; Rectangle: servings = (L/w) × (W/w)
  • Cake Serving Calculator calculates its result from Slice Width, Pir, Length, Width. It uses the formula Round: servings = 2πr ÷ slice width; Rectangle: servings = (L/w) × (W/w). Change any input to recalculate the result instantly.
  • The main inputs are Pan Shape, Pan Diameter / Length, Pan Width, Slice Width. Enter them in the units and format shown in the calculator.
  • Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Cake Serving

Inputs
  • Pan Shape: round
  • Pan Diameter / Length: 9
  • Pan Width: 13 rect only
  • Slice Width: 2

Using Slice Width = 2, Pir = 3, Length = 4, Width = 5, the calculated result is 0.8.

Sample result: Calculating…

Frequently asked questions

What does the Cake Serving calculate?

Cake Serving Calculator Calculate how many servings a cake will yield based on its size, shape, and serving size. — free online calculator.

Which values should I enter?

Enter Pan Shape, Pan Diameter / Length, Pan Width, Slice Width using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Round: servings = 2πr ÷ slice width; Rectangle: servings = (L/w) × (W/w).

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026