Two 8-Inch Round Pans to 9×13 Pan: Multiply Recipe by 1.16×

Multiply every recipe ingredient by 1.16× when converting Two 8-inch Round Cake Pans (Layer Set) to 9×13-inch Quarter-Sheet / Baking Pan (12 cups vs. 14 cups capacity). Keep original recipe oven temperature unchanged. Start checking doneness 3–5 minutes before original minimum bake time.

Reverse (9×13 Pan to Two 8-Inch Round Pans) →

Sample Recipes:

Original Recipe Pan

Your Target Baking Pan

From Pan

Two 8-inch Round Cake Pans (Layer Set)

100.53 sq in • 12 cups

Scale Ratio

Target Pan

9×13-inch Quarter-Sheet / Baking Pan

117 sq in • 14 cups

Pan note (1.16×): Multiply all recipe ingredients by 1.16× (surface-area ratio). Holds roughly double an 8×8 square or two 8-inch rounds; ideal for sheet cakes & bars.

Paste Ingredient Lines (one per line)

Supports fractions (2 1/2 cups, ¾ cup), metric weights (200g), US butter sticks, and packing notes (packed, sifted, scooped).

Converted Mixing-Bowl Checklist (1.16×)

Estimated matched ingredient weight: 1049.3 g (2.31 lb)

Scaled recipe ingredient checklist with gram weights and kitchen cup and spoon measures
Ingredient	Scale Weight	Cup / Spoon Measure
All-Purpose FlourInput: 2 1/4 cups all-purpose flour • spooned & leveled	313.2 g (11.05 oz)	2 ½ cups + 1 tbsp + 2 ¼ tsp
Unsalted ButterInput: 1 stick unsalted butter • packed into cup / 2 sticks	131.7 g (4.64 oz)	½ cup + 1 tbsp + ¾ tsp
Light Brown SugarInput: 3/4 cup light brown sugar, packed • firmly packed	174 g (6.14 oz)	¾ cup + 1 tbsp + 2 ¾ tsp
Granulated White SugarInput: 1/2 cup granulated sugar • poured or spooned & leveled	116 g (4.09 oz)	½ cup + 1 tbsp + ¾ tsp
2 large eggs	2.32 ×	2.32 large eggs
Pure Vanilla ExtractInput: 2 tsp vanilla extract • Poured liquid	10.1 g (0.35 oz)	2 ¼ tsp
Baking Soda / Sodium BicarbonateInput: 1 tsp baking soda • Dip and sweep	5.3 g (0.19 oz)	1 ¼ tsp
Diamond Crystal Kosher SaltInput: 1 tsp diamond crystal kosher salt • Pour and level	3.3 g (0.12 oz)	1 ¼ tsp
Semisweet Chocolate ChipsInput: 1 1/2 cups semisweet chocolate chips • Dip and sweep	295.8 g (10.43 oz)	1 ¾ cups

Original vs. Target Pan Dimensions

Original vs. target baking pan dimensions, surface area (sq in), and rim-full cup capacity for Two 8-Inch Round Pans to 9×13 Pan
Pan	Dimensions	Surface Area	Rim-Full Capacity
Two 8-inch Round Cake Pans (Layer Set)	2 × (8" dia × 2" H)	100.53 sq in	12 cups
9×13-inch Quarter-Sheet / Baking Pan	9" × 13" × 2" H	117 sq in	14 cups

Batter depth rule: Fill cake, brownie, and quick-bread pans between ½ and ⅔ full so batter rises evenly without doming. For dark nonstick or glass bakeware, reduce oven temperature by 25°F (15°C).

Frequently Asked Questions

What is the exact multiplier to convert Two 8-inch Round Cake Pans (Layer Set) to 9×13-inch Quarter-Sheet / Baking Pan? ▾

Multiply every recipe ingredient by 1.16× (computed via pan surface area: 117 sq in ÷ 100.53 sq in).

Do I need to change oven temperature or bake time for Two 8-Inch Round Pans to 9×13 Pan? ▾

Keep original recipe oven temperature unchanged. Start checking doneness 3–5 minutes before original minimum bake time. Always fill cake and quick-bread pans between ½ and ⅔ full so batter rises evenly without overflowing.