14-Inch vs 18-Inch Pizza Size: What’s the Real Difference?
When choosing between a 14-inch pizza and an 18-inch pizza, the difference is much bigger than it looks. Even though the diameter only increases by 4 inches, the total pizza area increases a lot.
This guide explains the size difference using area, slices, servings, and value so you can order the right pizza.
Pizza Size Basics
Pizza size is measured by diameter, but what really matters is area (how much pizza you actually get).
Formula used
Pizza area = π × radius²
14-Inch Pizza Size
- Diameter: 14 inches
- Radius: 7 inches
- Total area: ~154 square inches
- Typical slices: 8
- Serves: 2–3 people
A 14-inch pizza is usually considered a large pizza at many restaurants.
18-Inch Pizza Size
- Diameter: 18 inches
- Radius: 9 inches
- Total area: ~254 square inches
- Typical slices: 10–12
- Serves: 4–6 people
An 18-inch pizza is often called an extra-large or party pizza.
14-Inch vs 18-Inch Pizza (Size Comparison)
| Feature | 14-Inch Pizza | 18-Inch Pizza |
|---|---|---|
| Diameter | 14 in | 18 in |
| Total Area | ~154 sq in | ~254 sq in |
| Area Difference | — | +100 sq in |
| % More Pizza | — | ~65% more |
| Typical Slices | 8 | 10–12 |
Key takeaway
An 18-inch pizza has about 65% more pizza than a 14-inch pizza — not just “a little bigger”.
Simple Example (Easy to Understand)
Think of it like this:
- Ordering one 18-inch pizza is almost the same as ordering one and a half 14-inch pizzas
- If you’re feeding a group, the 18-inch pizza is far more filling
Which Pizza Is the Better Deal?
Most pizza shops price like this (example):
- 14-inch pizza: $16
- 18-inch pizza: $20
You pay 25% more money but get 65% more pizza.
18-inch pizza usually gives better value per square inch.
Which One Should You Choose?
Choose a 14-inch pizza if:
- You’re feeding 2–3 people
- You want fewer leftovers
- You want different flavors (two smaller pizzas)
Choose an 18-inch pizza if:
- You’re feeding 4–6 people
- You want the best value
- It’s a party or family meal
Final Thoughts
- 14-inch pizza is great for small groups
- 18-inch pizza is much larger than it looks
- Diameter can be misleading — area matters
- For groups and value, 18-inch usually wins
If you’re ever unsure, remember this rule:
A few extra inches in pizza size = a lot more pizza.
