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What Size Cake for 150 Guests?

Cutting party slices, a 3-tier stack (16" + 14" + 6") seats about 152 — enough for 150. Every option is below.

150 guests need

3-tier 16" + 14" + 6"

about 152 party servings (1½ × 2 in slice) · see all options below

Data & method: Serving counts from the published Wilton cake serving chart (4-inch-tall cakes; party 1½ × 2 in slice, wedding 1 × 2 in slice). Every figure is checked by an automated test. How we calculate →

Check any size or head count

Preset to 150 guests — the reverse lookup below the tiers finds the smallest fit.

Serving style
+ Add tiers for a tiered or wedding cake

Serves about

20

party slices (1½ × 2 in)

Your cake, tier by tier

Next: how much frosting for this cake? →

Or plan backwards — how many guests?

We'll find the smallest cake that seats them, using the party/wedding slice size selected above.

A 3-tier round (16" + 14" + 6") seats about 152 party servings — enough for 150.

Every way to seat 150

The chart below shows the smallest cake that covers 150 guests for each shape and slice size — all from the same Wilton figures the calculator uses. "Party" slices are 1½ × 2 in slice; "wedding" slices are the slimmer 1 × 2 in slice, which is why the wedding options run smaller.

Option Smallest fit Seats about
Round, party slices 3-tier 16" + 14" + 6" 152
Square, party slices 3-tier 16" + 14" + 6" 155
Round, wedding slices 2-tier 16" + 12" 156
Sheet, party slices no single sheet is big enough —

No single round in the standard chart seats 150 party-size, so the recommendation tiers: the engine picks the fewest tiers first (easier to bake, stack and serve), then the least waste — that's how it lands on a 3-tier stack (16" + 14" + 6"). Treat 150 as a minimum: end pieces and uneven cuts always cost a few servings, and leftover cake has never been a problem.

Cake ordered or planned? The frosting calculator and recipe scaler handle the baking side if you're making it yourself.

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Frequently Asked Questions

What size cake do I need for 150 guests?

Cutting party slices (1½ × 2 in slice), a 3-tier stack (16" + 14" + 6") seats about 152 — enough for 150. No single sheet in the standard chart covers 150 party slices — tier, or serve two sheets.

What size cake for 150 wedding guests?

Wedding slices are slimmer (1 × 2 in slice), so cakes stretch further: a 2-tier stack (16" + 12") seats about 156. Wedding planners usually add a few servings of margin on top for cutting loss.

Should I round up for 150 guests?

Yes — treat 150 as the minimum. End pieces, uneven cutting and second helpings all reduce the real yield, so a size (or tier) above the exact fit is the safe choice. Leftover cake keeps; running short doesn't fix itself.