Cake Calculator & Serving Size Guide
Round cake or sheet cake? 6-inch or 10-inch? Calculate exactly how much cake you need for your guest count.
Pizza Party Plan
Shopping List • 20 Guests • Pizza + Cake • 2 Hours
Food
Drinks
Dessert
ONEPAGEPARTY.COM
Party Food Calculator
Instant quantity estimates for your event
1. Party Details
Budget Estimator
Track your total party cost
Enter the price of one pizza to unlock the full budget breakdown.
2. Your Shopping List
Current Party Structure
Topping Guide:
- Cheese (30%)2
- Pepperoni (40%)2
- Specialty (30%)2
Confidence Interval
Pizza And Cake Checklist
Use this after the food math is done. It catches the serving basics, dessert details, and cleanup items that usually get forgotten until the boxes and cake are already on the table.
🍕Serve The Slices
🎂Cake Moment
⚙️Setup & Cleanup
Tip: 0 of 10 items completed
Quick links stay focused on the easiest-to-forget items.
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Helpful extras that make pizza night easier to serve
These picks help pizza-and-cake parties move faster, look more complete, and feel less improvised once guests start eating.
Serve The Slices
These are the picks that make pizza night easier to serve once the boxes land and guests start grabbing food fast.
Best pick for keeping slices easier to carry and less floppy than standard dessert plates, especially when kids are walking around.
Best for birthdays, school parties, and casual pizza buffets
Budget pick when you need to resize big slices quickly or split pizza into kid-friendly portions without making a mess.
Best for mixed adult-and-kid guest lists
Cake And Table Finishers
These picks help the dessert moment and general table setup feel more complete after the pizza round is over.
Best pick when the cake moment matters just as much as the food count and you want the dessert table to feel finished.
Best for birthdays and celebration dinners
Upgrade pick if you want enough matching tabletop basics for pizza, cake, and drinks without piecing supplies together last minute.
Best for home birthdays and low-prep party hosting
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Expert Note
Why do pizza parties usually need more serving support than hosts expect?
Pizza feels simple because the food itself is easy, but service gets messy fast once slices, drinks, and cake all hit at the same time. The right table basics keep the party from turning into a stack-of-boxes situation.
What helps most is separating the meal into moments: serving slices, handling drinks, and finishing with cake or themed extras. A few focused tools make the whole party feel more intentional without increasing the cooking workload.
Budgeting Guides for Your Pizza Party
Step 2
What's Next After the Shopping List?
See the setup, serving, drinks, and cleanup plan that turns this pizza party list into a complete party.
Food plan ready. Pick the next planning step.
Use these as follow-on actions after the shopping list, without interrupting the food math above.
Cake Serving Guide (The "Party Slice")
A "Party Slice" is typically smaller than a "Generous Slice" you might cut at home. Our calculator assumes standard party servings:
- Round Cakes: Slices are typically wedge-shaped, about 1.5 to 2 inches wide at the back.
- Sheet Cakes: Cut into 2" x 2" or 2" x 3" squares. This is the most efficient way to serve large crowds.
- Tiered Cakes: Usually for weddings, serving sizes are smaller (1" x 2").
Common Cake Sizes & Servings
🍰 Round Cakes
- 6 Inch Round 8-10 servings
- 8 Inch Round 12-14 servings
- 9 Inch Round 18-22 servings
- 10 Inch Round 25-30 servings
- 12 Inch Round 35-45 servings
📏 Sheet Cakes
- Quarter Sheet (9x13) 12-20 servings
- Half Sheet (11x15) 30-48 servings
- Full Sheet (18x24) 60-96 servings
Pro Tip: The "Outer Ring" Method
For round cakes larger than 10 inches, don't cut simple wedges! Cut a circle in the middle (about 4 inches from the edge), then cut slices from the outer ring. Finally, cut the center core into wedges. This prevents long, floppy slices that fall apart.