About the Cake Servings Calculator
How many portions a cake gives, and the cake size needed for a guest count.
Also known as: cake portions calculator, how many people does a cake serve, wedding cake servings, cake size guide.
How to use this calculator
- Enter calculate, shape, tiers, portion style and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
servings = cake area ÷ portion area
Worked example
Using the values pre-filled in the calculator above:
- Calculate: Servings from a cake
- Shape: Round
- Diameter or side = 20 cm
- Tiers = 1
- Portion style: Party portion (25 cm²)
the calculator returns:
- Servings: 12
- Cake area: 314 cm²
- Per tier: 12 servings
- Portion size: 25 cm²