The wedding cake serving calculator recommends tier configurations and sizes based on your guest count and serving style. Get total serving counts and sheet cake supplement options for larger weddings.
Cake Details
Servings Needed
with buffer
Recommended Tiers
tier cake
Recommended Tier Configuration
Sheet Cake Supplement Option
Tier Size Reference
| Tier Diameter | Wedding Servings | Party Servings |
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Wedding Cake Size Guide
Getting wedding cake serving sizes right is critical — both running out of cake and ordering too much are awkward outcomes. The key is understanding the difference between wedding servings (smaller, because guests are full from dinner) and party servings (larger, when cake is the primary dessert).
Wedding vs. party serving size
A standard wedding serving is 1" wide × 2" deep × 4" tall — about 1.5 oz of cake. A party serving is 2" wide × 2" deep × 4" tall — about 2 oz. If you have multiple desserts at your wedding (dessert table, macarons, pie), use wedding servings. If your guests will be eating primarily cake, size for party servings.
The sheet cake strategy for large weddings
For 150+ guests, many couples choose a smaller display cake for photos and the ceremonial first cut, supplemented by sheet cakes cut in the kitchen. Sheet cakes cost $2-4 per serving vs. $6-12+ for tiered display cakes — a significant savings for large guest counts. Guests often can't tell the difference in their slice.
Always order 10% more than your guest count
People go back for seconds. Servers cut uneven slices. Cake toppers and support rods reduce usable cake near the center. A 10% buffer ensures you don't run short — and leftover cake rarely goes to waste at a wedding.
FAQ
Is this wedding cake calculator free?
Yes, completely free with no signup required. All calculations run locally in your browser.
What size wedding cake do I need for 100 guests?
For 100 guests, a standard 3-tier cake (6"+9"+12") yields 100-120 wedding servings. If serving other desserts, a 2-tier (8"+12") with 80 servings plus a sheet cake supplement works well. Wedding servings are smaller than party slices (1"×2"×4" vs 2"×2"×4").
What is a wedding serving size vs party serving size?
A wedding serving is 1"×2"×4" — about 1.5 oz of cake. This smaller size is standard at weddings because guests typically eat dessert after a full meal. A party serving is 2"×2"×4" (about 2 oz), used when cake is the main dessert. If your wedding has multiple desserts (dessert bar, macarons), use wedding servings.
What are common wedding cake tier sizes?
Standard tiers (in inches): 6" (12-16 wedding servings), 8" (24-28 servings), 9" (32-36 servings), 10" (38-42 servings), 12" (56-64 servings), 14" (78-84 servings). The most common combo for 100 guests: 6"+9"+12" (100-116 total servings).
Do I need a sheet cake in addition to the display cake?
For guest counts over 150, a supplemental sheet cake is common practice. The display cake (3-4 tiers) stays beautiful for photos and first cuts, while the sheet cake — hidden in the kitchen — provides extra servings. Sheet cakes cost $2-4 per serving vs $6-12 for tiered cake servings, saving significant budget on large weddings.
How much does a wedding cake cost per serving?
Custom wedding cakes typically cost $6-12 per serving for standard designs, $12-20 for elaborate fondant/sugar flowers, and $4-7 for buttercream with simple decor. A 3-tier cake for 100 guests averages $600-900 from a local bakery. Sheet cake supplements run $2-4/serving.