By Zencalcy Editorial TeamLast reviewed About us
Recipe calls for a 9-inch round but you own an 8-inch square? Pan area decides batter depth — scale the recipe by the area ratio and adjust bake time.
Scale batter between round, square, and sheet pans by area.
factor = area(your pan) ÷ area(recipe pan)
| Symbol | Meaning |
|---|---|
| area | Round: πr² · Square/rect: length × width |
9" round (63.6 in²) → 8" square (64 in²): factor ≈ 1.01 — use the recipe as-is. 9" round → 9×13" sheet (117 in²): factor ≈ 1.84 — nearly double.
Continue with the Air Fryer Calculator, Butter Calculator, or the Cooking Measurement Converter — or browse more cooking converters tools and all cooking calculators.
Keep depth similar and time stays close; deeper batter needs lower heat and longer time. Start checking 5–10 minutes early.
Calculate dough hydration percentage for baking
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Content updated: September 2026