Adjust for your crowd
Enter how many of your guests are kids; each counts as half an adult.
Sheet cake for other crowd sizes
tap a row for its own list ↓| Guests | Slices | Half-sheet cakes |
|---|---|---|
| 10 people | 11 | 1 |
| 20 people · you're here | 22 | 1 |
| 25 people | 28 | 1 |
| 30 people | 33 | 1 |
| 40 people | 44 | 1 |
| 50 people | 55 | 2 |
| 75 people | 83 | 2 |
| 100 people | 110 | 3 |
| 150 people | 165 | 4 |
| 200 people | 220 | 5 |
1 half-sheet cake for 20 people. Bakeries often need a few days' notice for several sheets; order early for graduation season.
How many people does a 48-slice cake serve?
slices
Feeds about 48 people.
Everything else for 20 people
How we got this number
- 120 guests × 1 slice = 20 slices
- 2× 1.10 cushion = 22 slices
- 3÷ 48 per cake = 0.5 → 1 half-sheet cake
we count slices, then round up to whole cakes.
Sources for this rule: Tasting Table (Sam's Club bakery); Wikipedia; Old Farmer's Almanac party chart; WebstaurantStore; ezCater.
Sheet cake questions
How much sheet cake for 20 people?
Plan on 22 slices: 1 half-sheet cake. That's 1 slice per guest, plus a 10% cushion.
What if 4 of the 20 guests are kids?
Kids count as half an adult, so it's 18 adult portions: plan on 20 slices: 1 half-sheet cake.
How many people does a 48-slice cake serve?
Feeds about 48 people.
Different headcount? The sheet cake calculator works for any number of guests, and the menu planner builds one shopping list for the whole party.