Cake Serving Calculator
Work out exactly how many servings your cake will give, based on its shape, size, and slice style. Free tool for parties, weddings, and tiered celebration cakes.
Calculate Your Cake Servings
Enter your cake’s shape and size below to instantly find out how many portions it will serve, whether you’re planning a party or a tiered wedding cake.
Your Cake Details
Enter your cake shape and dimensions to calculate servings
Your Serving Estimate
Estimated number of portions
Typical Round Cake Servings
General guidance on how many servings common round cake sizes give, based on standard party and wedding slice sizes.
| Diameter | Party Servings | Wedding Servings |
|---|---|---|
| 6 inches | ~8 | ~16 |
| 8 inches | ~14 | ~28 |
| 10 inches | ~20 | ~40 |
| 12 inches | ~28 | ~56 |
| 14 inches | ~38 | ~76 |
| 16 inches | ~50 | ~100 |
Cake Serving Calculator FAQ
Everything you need to know about working out how many portions your cake will give.
The number of servings depends on the cake’s surface area and the size of slice used. A typical party slice is around 2 inches by 2 inches, while a smaller wedding or dessert slice is around 1 inch by 2 inches, giving roughly double the servings.
A party slice is a generous portion typically served at birthdays and casual celebrations, around 2 inches by 2 inches. A wedding or finger slice is a smaller, neater portion, around 1 inch by 2 inches, commonly used when a cake is served alongside other desserts.
To calculate servings for a tiered cake, work out the surface area of each individual tier, divide each by your chosen slice size to get servings per tier, then add the results together for the total number of servings.
Standard serving calculations assume a cake of typical height, usually around 4 inches with filling. Taller cakes can sometimes be cut into two layers per slice height, effectively increasing the number of servings from the same surface area.