Wedding Cake Serving Size Calculator
Enter your guest count to find out exactly how many tiers you need, what size each tier should be, and how many servings your cake will yield. Choose between standard and generous portions.
Guest Count & Serving Style
Your Recommended Cake
1
Tier
100
Servings (+0%)
~12
lbs
~5"
tall
Tier Breakdown
Servings Per Tier — Quick Reference
| Tier Size | Standard | Generous |
|---|---|---|
| 16" round | 100 servings | 66 servings |
| 14" round | 78 servings | 50 servings |
| 12" round | 56 servings | 36 servings |
| 10" round | 38 servings | 25 servings |
| 8" round | 24 servings | 16 servings |
| 6" round | 12 servings | 8 servings |
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Learn more →How Many Servings Per Tier?
The number of servings a wedding cake tier provides depends on its diameter and how you cut it. Industry-standard wedding cake slices measure approximately 1" wide by 2" deep by 4" tall, which is the “standard” serving used by most professional bakers across the US, UK, and Australia.
Here is a quick reference table for round tiers that are 4–5 inches tall:
| Tier Diameter | Standard Servings | Generous Servings |
|---|---|---|
| 6" | 12 | 8 |
| 8" | 24 | 16 |
| 10" | 38 | 25 |
| 12" | 56 | 36 |
| 14" | 78 | 50 |
| 16" | 100 | 66 |
As the table shows, each 2-inch increase in diameter adds significantly more servings due to the way the area of a circle scales. A 16" tier produces more than eight times the servings of a 6" tier. This is why bakers rarely go above 16 inches for the base tier — the structural requirements become challenging, and a five- or six-tier cake using smaller increments is more visually impressive.
Standard vs. Generous Portions
A standard serving is the classic 1" x 2" x 4" slice typically served at formal wedding receptions. It pairs perfectly with additional desserts like a sweet table or late-night snack station. If your wedding cake is the only dessert, or if your guests are big cake lovers, choose generous servings, which are roughly 50% larger at 1.5" x 2" x 4".
Most bakers will recommend standard sizing by default. Generous portions mean fewer servings per tier, which often translates to an extra tier — and a slightly higher cost. Use our Price Estimator to see how tier count affects pricing in your area.
Tips for Getting the Right Size
Wedding cake sizing involves more than just matching servings to your guest count. Here are a few practical tips from professional bakers:
- Order 10–20% extra servings. Not every guest will eat cake, but some will want seconds. A small buffer means you won't run short.
- Consider a display cake plus sheet cake. A stunning 3-tier display cake paired with kitchen-cut sheet cake is a popular way to serve 200+ guests without a towering 6-tier showpiece.
- Account for the top tier. Many couples save the top tier for their first anniversary. If that is your plan, do not count those servings toward your guest total.
- Discuss with your baker early. Experienced bakers know local preferences and can advise whether standard or generous cuts are the norm in your area.
Tracking your cake budget alongside serving needs? Our Budget Tracker lets you log quotes from multiple bakers and compare them to the national average.
Frequently Asked Questions
How many tiers do I need for 100 guests?
For 100 guests with standard servings, a classic 3-tier cake (12" + 9" + 6") provides approximately 106 servings. If you choose generous portions, you may need a 4-tier cake to comfortably cover everyone.
What is the difference between a 3-tier and 4-tier wedding cake?
A 3-tier cake typically serves 60–110 guests depending on tier sizes, while a 4-tier cake can serve 120–200+. Beyond servings, more tiers create a taller, more dramatic presentation — a 4-tier cake is roughly 20–24 inches tall including pillars or separators.
How much does a wedding cake weigh?
A good rule of thumb is approximately 0.12 lbs (about 2 ounces) per serving. A 3-tier cake serving 100 guests weighs around 12–15 lbs, while a 5-tier cake for 250 guests can weigh 30+ lbs. The weight matters for delivery logistics and support structure — your baker will factor this into the design.
Can I mix round and square tiers?
Absolutely. Square tiers yield about 25% more servings than round tiers of the same diameter because of the extra corner area. Mixing shapes is a popular modern design choice. Let your baker know so they can adjust the structural supports accordingly.