6 min readPart of: Baking Pan Sizes & How to Swap Them

How to Convert a Recipe to a Different Pan

You can bake almost any recipe in a different pan — you just need to scale the batter to match the new pan’s size, so it bakes at the same depth. Here’s the method, with worked examples and the time/temperature tweaks that go with it.

By The Baking Scale Pro Editorial Team · Reviewed against published baking standards · Updated 2026-06-15

The method: scale by area

Find each pan’s area, then multiply the recipe by new-area ÷ old-area.

Surface area is what keeps the batter at the same depth, so it bakes the same way. For round pans, area = π × radius². For square and rectangular pans, area = length × width. Divide the new pan’s area by the old one to get your scale factor, then multiply every ingredient by it.

Our Recipe Pan Scaler does this automatically — pick both pans and it rescales the whole ingredient list for you.

Do it automatically

Recipe Pan ScalerPick two pans, get the rescaled recipe Pan size converterCompare any two pans

Worked examples

Example pan conversions
From	To	Areas	Multiply by
8-inch round	9-inch round	50 → 64 in²	1.27×
9-inch round	9×13	64 → 117 in²	1.84×
9×13	9-inch round	117 → 64 in²	0.55× (or split in two)
8-inch square	9-inch round	64 → 64 in²	1.0× — swap freely

For example, to bake a 9-inch round recipe in a 9×13, multiply every ingredient by about 1.84. To go the other way, multiply by about 0.55 — or just split the batter between two pans.

Adjusting time and temperature

Keep the oven temperature the same — scaling by area keeps the batter depth (and so the bake) similar.
Start checking early. A wider, shallower bake finishes sooner; a deeper one takes longer.
Judge doneness with a skewer or thermometer, not the original time.
Don’t overfill — keep pans about two-thirds full and bake any extra as cupcakes.

Much deeper pans (loaf, springform) bake slower — lower the temperature by about 15°F (10°C) and add time so the center cooks through.

Baking Pan Sizes guideThe full how-and-why Is It Done? checkerConfirm doneness in the new pan

Tools for this

Recipe Pan Scaler Baking Pan Sizes guide Pan size converter

Frequently asked questions

How do I scale a recipe for a different size pan?

Divide the new pan’s area by the old pan’s area to get a multiplier, then multiply every ingredient by it. For example, a 9-inch round (64 in²) to a 9×13 (117 in²) is 117 ÷ 64 ≈ 1.84, so multiply everything by 1.84. Our Recipe Pan Scaler does the math automatically.

Do I change the oven temperature when I change pans?

Usually no — scaling by area keeps the batter at the same depth, so the temperature stays the same and the time is similar. Just start checking earlier. The exception is much deeper pans (loaf, springform): lower the temperature about 15°F and add time.

Can I just split a recipe between two pans?

Yes. If a recipe makes too much for your pan, dividing it between two smaller pans (for example, a 9×13 batter into two 8- or 9-inch rounds) works well — just keep each pan about two-thirds full and start checking for doneness early.