
Planning a wedding comes with a lot of questions, and one of the most important is: how much cake do I need? The last thing you want is to run out of cake or be left with lots of leftovers. The general rule is to have one slice of cake per guest, but there are many factors to consider, such as the size of your guest list, the type of cake, and whether you're serving other desserts.
| Characteristics | Values |
|---|---|
| Number of guests | 1 slice per guest is recommended, but not everyone will want a slice. Some sources suggest 1 slice per 80% of guests, others suggest 60-70% |
| Cake size | The number of portions depends on the diameter and height of the cake. A 6" tier will serve about 10 people, an 8" tier will serve 20-28, a 10" tier will serve 40-45, a 12" tier will serve 50-56, a 14" tier will serve 80-86, and a 16" tier will serve 100-110 |
| Timing | If the cake is served after a dance party, fewer people will eat it. If it is served plated with a meal, more people will eat it |
| Other desserts | If other desserts are served, less cake is needed. In this case, some sources suggest ordering 50% cake and filling in with other desserts, while others suggest ordering enough cake for 80% of guests, including all cakes |
| Dietary restrictions | Guests with dietary restrictions should be removed from the serve count and provided an alternative |
| Portion size | Standard wedding cake portions are 1"x2" or 1.5"x2". Smaller portions can help to reduce waste and stretch your budget |
| Sheet cakes | Simple sheet cakes can be kept in the kitchen to serve to guests, which can be a money-saving option |
| Leftovers | Some couples save the top tier of their cake to eat on their first wedding anniversary |
| Fake cake | Some couples use "fake cake" made with styrofoam for display, and have a cheaper cake to serve to guests |
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What You'll Learn

Cake size and number of guests
The number of slices of wedding cake you need depends on several factors, including the number of guests, the size of the slices, the timing of the cake cutting, and whether other desserts are being served.
Firstly, consider the number of guests. The general rule of thumb is to plan for around 75-90% of your total guest count to want a slice of cake. This means that if you have 100 guests, you should plan for around 75-90 slices of cake. However, it's important to note that this is just an estimate, and the actual number of guests who want cake may vary.
Another factor to consider is the size of the slices. Standard wedding cake servings are typically one-inch by two-inch slices, but some couples may opt for larger ""party-size" slices of one-and-a-half-inches by two-inches. The size of the slices will impact the total number of slices you need.
The timing of the cake cutting can also affect how many slices you need. If the cake is served after a meal, you may need fewer slices, as some guests may be too full to eat cake. On the other hand, if the cake is served in the evening, after the wedding breakfast and speeches, more guests may be interested in a slice of cake as a late-night snack.
Finally, consider whether you are serving other desserts in addition to the wedding cake. If you have a full dessert table or are serving a different dessert with dinner, you may need less cake. In this case, you can probably order about 50% cake and fill the rest with additional desserts.
To ensure you have enough cake for your guests, it's a good idea to consult with a professional baker, who can help you determine the appropriate cake size and number of slices based on your specific needs.
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Timing of cake cutting
The timing of your cake cutting can have an impact on how many slices of cake you will need. If you cut the cake right after dinner, you will likely need more slices than if you cut the cake in the middle of a dance party or after other desserts have been served. This is because not all guests will want to eat cake after they have just finished a meal, or if they are busy dancing and socialising.
If you are planning to cut the cake right after dinner, it is recommended to have at least one slice of cake per guest. This ensures that everyone who wants a slice of cake will get one, and some guests may even have seconds. However, if you are serving other desserts in addition to the cake, you may need less cake as guests will likely want to try a variety of treats. In this case, you can estimate that 75 to 85 percent of your guests will want a slice of cake.
If you are cutting the cake in the middle of the party, it is likely that not all guests will be present at the cake table, so you can get away with ordering less cake. In this case, it is recommended to order enough cake for 60 to 80 percent of your guests. This still ensures that there is enough cake for those who want it, while reducing the likelihood of having a lot of leftovers.
It is also important to consider the size of the cake slices. Standard wedding cake servings are typically one-inch by two-inch slices, but some couples may opt for larger "party-size" slices. If you are concerned about having too much cake, ask your baker about offering smaller slices. This can help stretch your budget further, as guests are likely to be satisfied with a slightly smaller piece of cake.
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Additional desserts
When it comes to wedding cakes, it's important to consider the number of guests you'll be inviting. Not everyone will want a slice of cake, but some may want seconds or to try each flavour. It's recommended to cater to 75-90% of your total guest count.
If you're serving other desserts, your cake might not need to serve as many guests as you think. Here are some additional dessert ideas to serve at your wedding:
- Doughnuts are a popular choice as they are affordable, easy to find, and can be customised with different flavours, toppings, and fillings. You can serve them as a wall of classic glazed doughnuts or a tower of doughnut holes.
- Cupcakes are a great alternative to a large cake as they are bite-sized and can be displayed with different flavours and toppings.
- Pies are an unexpected but increasingly popular choice, with the option to set up a pie station or cut them into bite-sized squares.
- Cookies are a versatile option that can be served by the slice or in miniature, and can be paired with milk.
- Candy bars have been a popular choice for decades, with guests able to enjoy a multitude of flavours and textures.
- For a refreshing option, especially for summer weddings, consider serving ice cream with a variety of toppings.
- For a fun and interactive option, set up a s'mores bar with graham crackers, chocolate bars, marshmallows, and other unique toppings.
- For a whimsical touch, hire a gourmet cotton candy business to cater to your reception.
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Sheet cakes
There are three standard-sized sheet cakes: quarter sheet cakes (9" x 13"), half sheet cakes (13" x 17" or 16" x 24"), and full sheet cakes (16" x 24"). The number of servings that can be cut from each sheet cake depends on the size of the slices. For example, a quarter sheet cake can yield 54 servings of 1" x 2" slices or 24 servings of 2" x 2" slices. A half sheet cake can serve 108 people with 1" x 2" slices or 54 people with 2" x 2" slices. Similarly, a full sheet cake can provide 108 servings of 1" x 2" slices or 96 servings of 2" x 2" slices.
When planning your wedding cake, it is generally recommended to plan for one slice of the bride's cake per guest and a half slice of the groom's cake. However, it is common for some guests to decline a slice of cake, so you may only need to order enough cake for 80% of your guests. Additionally, consider the timing of when you plan to serve the cake. If served earlier in the night, more people are likely to eat it, whereas if served later, you may need less cake as people will be dancing, drinking, and enjoying other activities.
To save money, some couples opt for a small display cake and additional sheet cakes to serve to their guests. This way, you can have a beautiful cake for photos and still ensure enough servings for your guests without breaking your budget.
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Cake shape
The number of slices of cake you can get from a cake depends on its shape, size, and how you cut it.
Round, square, and heart-shaped cakes each produce different numbers of portions. A square cake will yield more portions than a round or heart-shaped cake. Unusual shapes—such as octagonal or hexagonal cakes—yield a similar number of portions as their square counterparts.
The number of portions you can get from a round cake depends on its diameter and height. A single-tier wedding cake can serve between 10 and 30 guests, depending on the size of the cake and whether you are serving "finger portions" or "dessert portions". A 6-inch tier of a cake will serve about 10 people, or about 10-14 servings. A 10-inch tier of a cake will serve approximately 40-45 people, or 40-45 servings.
Square cakes are often chosen for their modern and clean look, and they can be a stylish choice for contemporary wedding themes. Square cakes also offer more servings than a round cake of the same size.
Heart-shaped cakes can be more challenging to cut and serve, and they yield fewer portions than a round or square cake.
If you are having a large wedding party but don't want a large cake, you can choose to have a sheet cake, which is typically rectangular and kept in the catering kitchen to be sliced and served.
When planning a tiered cake design, make sure your smallest base size is a minimum of 10 inches, or the cake will not be stable or proportionate.
Professional cake decorators use a specific cutting method to ensure neat, uniform pieces, depending on the cake's shape. For round cakes, the general method is to cut a smooth, evenly spaced circle about 2 inches in from the outer edge of the tier. Cut the ring into slices that are about 1 inch across. Cut another circle 2 inches farther in and slice that ring into 1-inch pieces. Repeat this process until you have a small circle of cake left in the centre, which you then cut into pieces that measure approximately 1 inch along the outer edge.
For tall cakes, you may need to cut each slice in half horizontally to create thin slices of about 1 inch in width.
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Frequently asked questions
It is recommended to have one slice of cake per guest. However, if you are serving other desserts, you may only need 50% of the cake.
The size of your cake depends on the number of guests and the size of the slices. A standard wedding cake serving is 1x2 inches, but you can also opt for larger slices.
Yes, there are two types of wedding cake slices: finger portions and dessert portions. Finger portions are typically 1x1x4 inches, while dessert portions are larger at 2x1x4 inches.
Consult with a professional baker to get their opinion. Consider the landscape of your venue when selecting the cake size. You can also utilize sheet cakes or create an illusion with "fake cake" to have a multi-layer display without wasting cake.




















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