Pictured: Three tier semi naked Wedding cake 10", 8", 6" tiers to accommodate appoximately 80 guests
The number of portions or servings of a wedding cake depends on many factors, including the size of the cake tiers, the shape of the cake, and how the cake is cut. Additionally, the number of guests at the wedding and whether the cake is the primary dessert or part of a larger dessert spread will influence the number of portions required.
As a general guideline, a traditional wedding cake serving is typically 1" by 2" by the height of the cake. However, with trends continuing towards taller wedding cakes, this portion size could change to 1” x 1”.
The number of portions can be estimated by calculating the volume of the cake and dividing it by the volume of a standard serving.
Here's a rough estimate for round cakes based on a 5” tall tier:
A 6-inch round cake serves about 10-15 people.
An 8-inch round cake serves about 25-30 people.
A 10-inch round cake serves about 35-40 people.
A 12-inch round cake serves about 55-60 people.
For square cakes, the number of portions are usually slightly higher:
A 6-inch square cake serves about 20 people.
An 8-inch square cake serves about 30 people.
A 10-inch square cake serves 50 people.
A 12-inch square cake serves about 70 people.