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Cocina & Recetas3 min•2026-10-29•Compute-Hub Culinary Desk
Baking Pan Size Converter: Scale Cake & Brownie Recipes
How surface area ratios let you seamlessly adapt ingredients to round, square, or rectangular pans.
Key Takeaways
- Pan scaling is based on Surface Area ($A_2 / A_1$), not diameter or perimeter.
- Replacing an 8-inch round pan with a 9-inch round pan requires a 1.27x ingredient multiplier (+27%).
- An 8-inch square pan has 64 sq inches, compared to just 50.3 sq inches for an 8-inch round pan (+27% larger!).
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Why You Cannot Just Use the Same Recipe in a Different Pan
If you pour batter intended for an 8-inch pan into a 10-inch pan, the batter will spread too thin, cook too quickly, and turn out dry and tough. Conversely, putting a large recipe in a small pan causes the center to stay raw while the edges burn.
Mathematical Formula:Scale Factor = Target Pan Area / Original Pan Area (Round: π × r² | Rect: L × W)
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Frequently Asked Questions
FAQ: Baking Pan Size Converter: Scale Cake & Brownie Recipes
Does baking time change when scaling pan sizes?
If the batter depth remains the same (because you adjusted both recipe quantity and pan size), the baking time will remain almost identical. If batter is thinner, reduce cook time by 15-20%.