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Multiply by 0.99

8 inch square pan to 9 inch round pan

Use the recipe as it is. Each ingredient times 0.99. An 8 inch square covers 64 square inches. A 9 inch round covers 63.6. The factor is 0.99, so use the recipe as it is. These two pans are a near perfect swap.

Pan in the recipe (what it says)
Pan you will use (what you have)

Multiply the recipe by

1.00×

Both pans are drawn to the same scale.
Recipe panYour pan
Area
Pan capacity
Which of my pans will work?

Tick the pans you own. We list the ones within about 10% of the recipe pan's volume, best first. Your ticks stay in this browser only.

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    Bake time and temperature

    Rule of thumb: deeper batter, lower the oven 25°F (15°C) and add 5 to 15 minutes. Thinner batter, same oven, check early.

    Scale your ingredients

    Round amounts to

      8" square to 9" round

      Recipe panYour pan
      Pan8" square9" round
      Area64 sq in63.6 sq in
      Capacity8.9 cups8.8 cups
      Multiply by0.99
      • This is the easiest swap in the cupboard. A cake that asks for an 8 inch square pan bakes well in a 9 inch round, and the other way round.
      • A 9 inch square is a different story. It covers 81 square inches, so a 9 inch round takes only 0.79 times a 9 inch square recipe.
      • The batter depth does not change, so keep the oven temperature and check at the recipe time.

      Example: a plain butter cake

      This is a sample ingredient list scaled for this swap. Paste your own recipe in the tool above to scale it.

      Recipe saysUse
      2 cups all-purpose flour2 cups all-purpose flour
      1 1/2 cups sugar1 1/2 cups sugar
      1/2 cup (1 stick) butter1/2 cup (1 stick) butter
      3 large eggs3 large eggs
      3/4 cup milk3/4 cup milk
      2 tsp baking powder2 tsp baking powder

      Bake time and temperature

      For a recipe that bakes 35 minutes at 350°F: start checking at 33 minutes and expect it done by 37, at 350°F.

      The batter depth is close to the recipe pan. Keep the same oven temperature and check at about the same time.

      Fill any pan no more than two thirds full. Bake leftover batter as cupcakes.

      Questions about this swap

      Is an 8 inch square the same as a 9 inch round?

      By area, yes: 64 and 63.6 square inches. You can use either pan with the same recipe.

      What round pan replaces a 9 inch square?

      A 10 inch round is 78.5 square inches, close to the 81 of a 9 inch square. The factor from 9 inch square to 10 inch round is 0.97.

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