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 | 22 | 1 |
| 25 people | 28 | 1 |
| 30 people | 33 | 1 |
| 40 people | 44 | 1 |
| 50 people | 55 | 2 |
| 75 people | 83 | 2 |
| 100 people · you're here | 110 | 3 |
| 150 people | 165 | 4 |
| 200 people | 220 | 5 |
3 half-sheet cakes for 100 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 100 people
How we got this number
- 1100 guests × 1 slice = 100 slices
- 2× 1.10 cushion = 110 slices
- 3÷ 48 per cake = 2.3 → 3 half-sheet cakes
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 100 people?
Plan on 110 slices: 3 half-sheet cakes. That's 1 slice per guest, plus a 10% cushion.
What if 20 of the 100 guests are kids?
Kids count as half an adult, so it's 90 adult portions: plan on 99 slices: 3 half-sheet cakes.
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.