Pan size converter

If a recipe calls for a pan you don't have, pick the pan it asks for and the one you're using. You'll see how much to scale the recipe so the batter comes out the same depth, and what to expect from the bake time.

The recipe's pan

Your pan

Make about 1¼ times the recipe

That's every amount multiplied by 1.27, and it fills the 9-inch round pan to the same depth as the 8-inch round pan.

The 8-inch round pan is 50 sq in (324 cm²) and the 9-inch round pan is 64 sq in (410 cm²).

If you scale the recipe, the batter sits at about the same depth and bakes in about the same time, though it's worth checking a few minutes early and going by the usual signs of doneness. If you keep the recipe as it is, the batter will be about 21% shallower and will bake faster, so check it well before the time in the recipe.

Scale the ingredients too

Paste the recipe's ingredients, one per line

Common pan sizes and their areas

Each row gives the area of the pan's bottom, which decides how deep the batter sits. The last column compares each one with a 9-inch round.

Pan	Square inches	cm²	× a 9-inch round
6-inch round	28	182	0.44
8-inch round	50	324	0.79
9-inch round	64	410	1
10-inch round	79	507	1.23
8-inch square	64	413	1.01
9-inch square	81	523	1.27
11 × 7 inch	77	497	1.21
13 × 9 inch	117	755	1.84
15 × 10 inch jelly roll	150	968	2.36
18 × 13 inch half sheet	234	1510	3.68
8½ × 4½ inch loaf	38	247	0.6
9 × 5 inch loaf	45	290	0.71

A Bundt pan is sold by how many cups it holds, and that number is usually stamped on the bottom. The common sizes hold 6, 10 and 12 cups.

Swaps that work

The recipe's pan	Your pans	Scale by	What to do
13 × 9 inch	two 9-inch round pans	1.09	Fits as is, a little thinner or thicker
13 × 9 inch	two 8-inch square pans	1.09	Fits as is, a little thinner or thicker
13 × 9 inch	two 8-inch round pans	0.86	Make 0.86 of the recipe
9-inch square	a 9-inch round pan	0.79	Make 0.79 of the recipe
8-inch square	a 9-inch round pan	0.99	Fits as is, a little thinner or thicker
8-inch round	a 9-inch round pan	1.27	Make 1.27 times the recipe
11 × 7 inch	a 9-inch square pan	1.05	Fits as is, a little thinner or thicker
9 × 5 inch loaf	a 8½ × 4½ inch loaf pan	0.85	Make 0.85 of the recipe

How the bake time changes

The bake time depends on how deep the batter is, more than on how much there is. If you scale the recipe to the new pan, the depth stays about the same and so does the time, though it's worth checking a few minutes early and going by the usual signs: a toothpick that comes out clean, edges pulling away from the pan, a top that springs back.

If you pour the recipe into a smaller pan without scaling it, the batter is deeper and needs longer. Lowering the oven by 25°F helps the middle set before the edges overbake. In a bigger pan it spreads thinner and bakes faster. Glass and dark metal pans brown faster than light metal ones, so the same 25°F drop helps there too.

Questions people ask

Can I bake a 9x13 recipe in two 9-inch round pans?

Yes. Two 9-inch rounds have about 127 square inches between them and a 13 × 9 pan has 117, so the layers come out a little thinner and bake a few minutes faster.

How do I convert a round pan to a square one?

Compare their areas. An 8-inch square holds about the same as a 9-inch round (64 and 64 square inches), so a 9-inch round recipe fits an 8-inch square as is. A 9-inch square is about 27% bigger, so scale the recipe by 1.27.

What size is a half sheet pan?

18 × 13 inches, about twice the area of a 13 × 9 pan. A quarter sheet is 13 × 9.

Does pan size matter for brownies and bars?

Yes, because their texture depends on how thick they are. In a bigger pan they come out thin and can dry out; in a smaller one the middle stays underbaked. Scale the recipe to the new pan and the texture stays the same.

More free kitchen tools

Recipe scaler: Paste a recipe's ingredients and choose how many people you're cooking for, and every amount comes back in cups and spoons you can measure.
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