Sheet Cake Sizes & Servings
Full, half, and quarter sheet cake sizes with servings and planning tips.
Full Sheet Cake:
18" × 26" (46 × 66 cm)
Serves 78-234 people
Half Sheet Cake:
13" × 18" (33 × 46 cm)
Serves 40-116 people
Quarter Sheet Cake:
9" × 13" (23 × 33 cm)
Serves 20-58 people
Pick a sheet cake size that feeds your guest count without a fridge full of leftovers. Below: standard dimensions, servings, and cutting tips.
Sheet Cake Size Chart
| Cake Size | Dimensions (Inches) | Dimensions (cm) | Standard Servings (2" × 2") | Larger Servings (2" × 3") |
|---|---|---|---|---|
| Full Sheet Cake | 18" × 26" | 46 × 66 cm | 117 servings | 78 servings |
| Half Sheet Cake | 13" × 18" | 33 × 46 cm | 58 servings | 40 servings |
| Quarter Sheet Cake | 9" × 13" | 23 × 33 cm | 29 servings | 20 servings |
Sheet Cake Sizes Explained
Dimensions: 18 inches × 26 inches (46 cm × 66 cm)
Full sheet cakes are the largest standard size—common for large events and 80+ guests when you want leftover servings.
Standard Servings (2" × 2"):
117 servings
Larger Servings (2" × 3"):
78 servings
Best for:
- Large weddings and events (80+ guests)
- Corporate events and office parties
- When you want generous leftovers
Dimensions: 13 inches × 18 inches (33 cm × 46 cm)
Half sheet cakes suit medium events—birthday parties, small weddings, office gatherings—with about 40–60 guests on typical servings.
Standard Servings (2" × 2"):
58 servings
Larger Servings (2" × 3"):
40 servings
Best for:
- Medium-sized events (40-60 guests)
- Birthday parties and celebrations
- Small weddings and receptions
Dimensions: 9 inches × 13 inches (23 cm × 33 cm)
Quarter sheet cakes suit small gatherings and family celebrations, or when you want a smaller cake to test a recipe.
Standard Servings (2" × 2"):
29 servings
Larger Servings (2" × 3"):
20 servings
Best for:
- Small gatherings (20-30 guests)
- Family celebrations and parties
- Intimate events and small office parties
Serving Size Guidelines
Standard Servings (2" × 2" squares):
This is the most common serving size for sheet cakes. Each piece is 2 inches by 2 inches—a moderate portion for most events. This size works well when cake is one of several desserts or when you want to serve many people.
Larger Servings (2" × 3" rectangles):
For events where cake is the main dessert or when you want more generous portions, cut the cake into 2" × 3" rectangles. This provides about 50% more cake per serving but reduces the total number of servings.
For Standard 2" × 2" Servings:
- Cut the cake lengthwise into strips that are 2 inches wide
- Then cut each strip crosswise into 2-inch squares
- Use a sharp knife and wipe it clean between cuts for neat slices
For Larger 2" × 3" Servings:
- Cut the cake lengthwise into strips that are 2 inches wide
- Then cut each strip crosswise into 3-inch rectangles
- This creates larger, more substantial servings
Event Planning Guide
Recommended: Quarter Sheet Cake (9" × 13")
A quarter sheet cake serves 20-58 people with standard servings, providing just enough cake for your event. Order a half sheet if you want leftovers.
Recommended: Half Sheet Cake (13" × 18")
A half sheet cake serves 40-116 people with standard servings—a common pick for medium-sized events and birthday parties.
Recommended: Full Sheet Cake (18" × 26")
A full sheet cake serves 78-234 people with standard servings—enough for large weddings, corporate events, and big celebrations. Consider ordering two half sheets if you need variety or want to serve more people.
Tip: When in doubt, order one size larger than you think you need. It's better to have leftovers than to run out of cake. Most bakeries can accommodate last-minute size changes if you order early enough.
Recommendations by Occasion
Half sheet cakes cover most birthday parties (about 40-116 people). For kids' parties, consider ordering slightly larger as children often want seconds.
For small weddings (under 60 guests), a half sheet cake works well. For larger weddings, order a full sheet cake or multiple half sheets in different flavors. Many couples also use sheet cakes as a cost-effective alternative to tiered cakes.
Quarter or half sheet cakes work for office celebrations. Match the size to your team and whether you want leftovers for the next day. Half sheets are popular for departments of 30-50 people.
Quarter sheet cakes suit small family celebrations. For larger family reunions or holidays, a half or full sheet cake helps everyone get a piece with leftovers.