9×9 Square to 9×13 Baking Pan: Multiply Recipe by 1.44×

Multiply every recipe ingredient by 1.44× when converting 9×9-inch Square Baking Pan (2" deep) to 9×13-inch Quarter-Sheet / Baking Pan (10 cups vs. 14 cups capacity). Lower oven temperature by 15–25°F (10–15°C) if baking a single wide/deep pan. Expect +5 to +12 minutes of bake time if batter depth increases.

Reverse (9×13 Baking Pan to 9×9 Square Pan) →

Sample Recipes:

Original Recipe Pan

Your Target Baking Pan

From Pan

9×9-inch Square Baking Pan (2" deep)

81 sq in • 10 cups

Scale Ratio

Target Pan

9×13-inch Quarter-Sheet / Baking Pan

117 sq in • 14 cups

Pan note (1.44×): Multiply all recipe ingredients by 1.44× (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 (1.44×)

Estimated matched ingredient weight: 1302.6 g (2.87 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	388.8 g (13.71 oz)	3 ¼ cups
Unsalted ButterInput: 1 stick unsalted butter • packed into cup / 2 sticks	163.4 g (5.77 oz)	⅔ cup + 2 ½ tsp
Light Brown SugarInput: 3/4 cup light brown sugar, packed • firmly packed	216 g (7.62 oz)	1 cup + 1 tbsp + ¾ tsp
Granulated White SugarInput: 1/2 cup granulated sugar • poured or spooned & leveled	144 g (5.08 oz)	⅔ cup + 2 ½ tsp
2 large eggs	2.88 ×	2.88 large eggs
Pure Vanilla ExtractInput: 2 tsp vanilla extract • Poured liquid	12.5 g (0.44 oz)	1 tbsp
Baking Soda / Sodium BicarbonateInput: 1 tsp baking soda • Dip and sweep	6.6 g (0.23 oz)	1 ½ tsp
Diamond Crystal Kosher SaltInput: 1 tsp diamond crystal kosher salt • Pour and level	4.1 g (0.14 oz)	1 ½ tsp
Semisweet Chocolate ChipsInput: 1 1/2 cups semisweet chocolate chips • Dip and sweep	367.2 g (12.95 oz)	2 cups + 2 tbsp + 1 ¾ tsp

Original vs. Target Pan Dimensions

Original vs. target baking pan dimensions, surface area (sq in), and rim-full cup capacity for 9×9 Square to 9×13 Baking Pan
Pan	Dimensions	Surface Area	Rim-Full Capacity
9×9-inch Square Baking Pan (2" deep)	9" × 9" × 2" H	81 sq in	10 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 9×9-inch Square Baking Pan (2" deep) to 9×13-inch Quarter-Sheet / Baking Pan? ▾

Multiply every recipe ingredient by 1.44× (computed via pan surface area: 117 sq in ÷ 81 sq in).

Do I need to change oven temperature or bake time for 9×9 Square to 9×13 Baking Pan? ▾

Lower oven temperature by 15–25°F (10–15°C) if baking a single wide/deep pan. Expect +5 to +12 minutes of bake time if batter depth increases. Always fill cake and quick-bread pans between ½ and ⅔ full so batter rises evenly without overflowing.