8×8 Square to 9×13 Baking Pan: Multiply Recipe by 1.83×
Multiply every recipe ingredient by 1.83× when converting 8×8-inch Square Baking Pan (2" deep) to 9×13-inch Quarter-Sheet / Baking Pan (8 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.
Pan note (1.83×): Multiply all recipe ingredients by 1.83× (surface-area ratio). Holds roughly double an 8×8 square or two 8-inch rounds; ideal for sheet cakes & bars.
Supports fractions (2 1/2 cups, ¾ cup), metric weights (200g), US butter sticks, and packing notes (packed, sifted, scooped).
Converted Mixing-Bowl Checklist (1.83×)
Estimated matched ingredient weight: 1655.3 g (3.65 lb)
| ✓ | Ingredient | Scale Weight | Cup / Spoon Measure |
|---|---|---|---|
All-Purpose FlourInput: 2 1/4 cups all-purpose flour • spooned & leveled | 494.1 g (17.43 oz) | 4 ⅛ cups | |
Unsalted ButterInput: 1 stick unsalted butter • packed into cup / 2 sticks | 207.7 g (7.33 oz) | ¾ cup + 2 tbsp + 2 tsp | |
Light Brown SugarInput: 3/4 cup light brown sugar, packed • firmly packed | 274.5 g (9.68 oz) | 1 ⅓ cups + 2 tsp | |
Granulated White SugarInput: 1/2 cup granulated sugar • poured or spooned & leveled | 183 g (6.46 oz) | ¾ cup + 2 tbsp + 2 tsp | |
2 large eggs | 3.66 × | 3.66 large eggs | |
Pure Vanilla ExtractInput: 2 tsp vanilla extract • Poured liquid | 15.9 g (0.56 oz) | 1 tbsp + ¾ tsp | |
Baking Soda / Sodium BicarbonateInput: 1 tsp baking soda • Dip and sweep | 8.4 g (0.3 oz) | 1 ¾ tsp | |
Diamond Crystal Kosher SaltInput: 1 tsp diamond crystal kosher salt • Pour and level | 5.1 g (0.18 oz) | 1 ¾ tsp | |
Semisweet Chocolate ChipsInput: 1 1/2 cups semisweet chocolate chips • Dip and sweep | 466.7 g (16.46 oz) | 2 ¾ cups |
Original vs. Target Pan Dimensions
| Pan | Dimensions | Surface Area | Rim-Full Capacity |
|---|---|---|---|
| 8×8-inch Square Baking Pan (2" deep) | 8" × 8" × 2" H | 64 sq in | 8 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 8×8-inch Square Baking Pan (2" deep) to 9×13-inch Quarter-Sheet / Baking Pan? ▾
Multiply every recipe ingredient by 1.83× (computed via pan surface area: 117 sq in ÷ 64 sq in).
Do I need to change oven temperature or bake time for 8×8 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.