Cake Pan Size Conversion Chart
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Every cake pan holds a specific batter volume based on its area and depth, and scaling a recipe written for one pan into another size means matching that volume, not just eyeballing it, or the cake bakes unevenly, overflows, or comes out too thin. This chart lists approximate batter volume and servings for the most common round, square, and sheet pan sizes, plus how to adjust bake time and temperature when you change pan size.
Round pan sizes: volume and servings
6 inch round (15cm), 2 inches deep: holds about 4 cups of batter, serves 8 to 10 as a single layer, or 12 to 16 stacked as a 2-layer cake. A popular size for small celebration cakes.
8 inch round (20cm), 2 inches deep: holds about 6 cups of batter, serves 12 to 15 as a single layer, or 20 to 24 stacked. The most common home baking size and the default most recipes are written for.
9 inch round (23cm), 2 inches deep: holds about 8 cups of batter, serves 16 to 20 as a single layer, or 24 to 28 stacked. Roughly 30 percent more volume than an 8 inch pan of the same depth despite looking only modestly bigger.
10 inch round (25cm), 2 inches deep: holds about 10 to 11 cups of batter, serves 20 to 24 as a single layer. A common size for larger celebration and wedding tier cakes.
Square and rectangular pan sizes
8 inch square (20cm): holds about 6 cups of batter, similar volume to an 8 inch round, serves 12 to 16 depending on cut size.
9 inch square (23cm): holds about 8 cups of batter, serves 16 to 20, comparable in volume to a 9 inch round.
9x13 inch sheet (23x33cm): holds about 12 to 14 cups of batter, serves 24 to 36 depending on cut size. The standard American sheet cake and potluck pan.
Half sheet pan (13x18 inch / 33x46cm): holds about 16 to 18 cups of batter for a standard sheet cake depth, serves 40 to 60. Common for larger gatherings and as a base for slab-frosted celebration cakes.
Converting a recipe between pan sizes by volume
To scale a recipe, calculate the volume ratio between your target pan and the pan the recipe was written for, then multiply every ingredient by that ratio. Moving an 8 inch round recipe (about 6 cups capacity) into a 10 inch round (about 10 cups capacity) means scaling ingredients up by roughly 10 divided by 6, or about 1.67 times the original amounts.
Pan area, not just diameter, determines volume, which is why a jump from 8 to 10 inches in diameter looks modest but represents a much bigger area increase: area scales with the square of the radius, so a 25 percent increase in diameter produces roughly a 56 percent increase in area and batter capacity. Always calculate by area or volume rather than by diameter alone when scaling a recipe.
Adjusting bake time and temperature for pan size
A larger pan holding the same total batter in a thinner layer bakes faster and often benefits from a slightly higher temperature to set the edges before the center dries out; a smaller, deeper pan holding more batter in a thicker layer needs more time at the same or a slightly lower temperature to cook through without burning the outside. As a general guide, dropping the oven temperature by about 10-15°C (15-25°F) and extending the bake time helps very deep or very large cakes bake evenly without a domed, cracked top or an underbaked center.
Always test with a toothpick or cake tester rather than relying purely on the clock when changing pan size, since batter depth, pan material (dark metal bakes hotter and faster than light metal or glass), and oven variation all shift actual bake time meaningfully from any general chart.