Baking pan size converter

Choose the pan your recipe calls for and the pan you have. You will see how much to multiply the ingredients and how the baking time may change.

Multiply every ingredient by 1.84 (about 1 3/4x).

Recipe pan area64 sq in
Your pan area117 sq in
Same batter, no scaling46% thinner

If you keep the recipe as is, the batter will be thinner: keep the same temperature and start checking 25 to 30% earlier. Scaled recipes usually bake at the same temperature; check for doneness a few minutes early.

Why pan size matters

The same batter spread in a bigger pan bakes thinner and faster; in a smaller pan it bakes deeper and slower, and can overflow. Matching the pan area keeps the batter at the depth the recipe was tested at, so the timing stays close to what is written.

Tips for switching pans

  • Fill cake pans no more than two thirds full.
  • Glass and dark metal pans bake faster than light metal; lower the oven by 25°F when using them.
  • Use the toothpick test: it should come out clean or with a few moist crumbs.

Once you know the multiplier, the recipe scaler does the math for every ingredient. Try it with our easy banana bread.

Frequently asked questions

Can I bake a 9x13 recipe in two 8 inch round pans?

Yes. A 9x13 pan has about 117 square inches and two 8 inch rounds have about 100, so the batter will be slightly deeper. Fill each pan about two thirds full and check a few minutes later than the recipe says.

How do I convert an 8x8 recipe to 9x13?

A 9x13 pan is about 1.8 times the size of an 8x8 pan, so multiply the ingredients by about 1 3/4, or simply double the recipe and bake a little longer.

Do I change the baking time for a different pan?

Often, yes. Deeper batter takes longer and may need the oven lowered by 25°F so the center cooks before the edges overbake. Thinner batter bakes faster, so start checking early.

How is the pan size calculated?

By the area of the bottom of the pan. This works well for pans of similar depth. For tube, Bundt and very deep pans, compare their volume in cups instead.

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