Easily convert round, square, and rectangular cake pans with this free Cake Pan Converter. Instantly calculate recipe scaling, batter adjustments, and baking conversions for perfect cakes every time.

Free Baking Tool

🎂 Cake Pan Converter

Convert cake recipes between different pan sizes instantly. Works for round, square, and rectangular pans — with exact ingredient scaling factor.

Calculate Pan Conversion Factor

📋 Recipe Pan (Original)

Pan Diameter (inches)

Or enter size manually (inches)

Number of pans

🎯 Your Pan (Target)

Pan Diameter (inches)

Or enter size manually (inches)

Number of pans

Multiply Recipe By

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Original Pan Area

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Your Pan Area

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Baking Time

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Areeba — Ovenly Magic

Professional baker with 3+ years experience. All conversion formulas use area-based calculations — the same method used by professional pastry chefs worldwide.

Standard Cake Pan Sizes & Volumes

Reference chart for most common baking pan sizes

Pan Size	Area (sq in)	Volume (cups)	Best For
6 inch round	28 sq in	4 cups	Small layer cakes, smash cakes
7 inch round	38 sq in	5-6 cups	Small celebration cakes
8 inch round	50 sq in	6 cups	Layer cakes, birthday cakes
9 inch round	64 sq in	8 cups	Most common — standard cakes
10 inch round	79 sq in	10-11 cups	Large cakes, party cakes
12 inch round	113 sq in	15-16 cups	Wedding cake tiers, large events
14 inch round	154 sq in	20+ cups	Large wedding/event cakes

Pan Size	Area (sq in)	Volume (cups)	Best For
8×8 inch square	64 sq in	8 cups	Brownies, bar cookies, small cakes
9×9 inch square	81 sq in	10 cups	Brownies, coffee cake, cinnamon rolls
10×10 inch square	100 sq in	12 cups	Larger brownies and bars
9×13 inch rectangle	117 sq in	14-15 cups	Sheet cakes, dump cakes, brownies
10×15 inch jelly roll	150 sq in	10 cups shallow	Swiss roll, thin sheet cakes
11×17 inch sheet	187 sq in	12 cups	Large sheet cakes

Pan Size	Area (sq in)	Best Use	Equivalent To
8×4 inch loaf	32 sq in	Banana bread, pound cake	One 6-inch round
9×5 inch loaf	45 sq in	Quick breads, meatloaf	One 7-inch round
7×11 inch	77 sq in	Smaller sheet cakes	Two 7-inch rounds
9×13 inch	117 sq in	Sheet cakes, dump cakes	Two 9-inch rounds
10×15 inch	150 sq in	Roll cakes, thin sheets	Two 10-inch rounds
12×18 inch	216 sq in	Professional sheet cakes	Three 9-inch rounds

Pan Type	Size	Volume	Notes
Bundt pan (standard)	10 inch	12 cups	Cannot use pan converter — unique shape
Tube/Angel food pan	10 inch	16 cups	Cannot swap with regular pans
Springform pan	9 inch	10 cups	Use 1.25x recipe vs regular 9-inch
Springform pan	10 inch	12 cups	Similar to standard Bundt
Muffin tin (12 cup)	Standard	1 cup each	12 cups total = one 9×13 pan
Mini muffin tin (24)	Mini	0.25 cup each	For cupcake recipe scaling

Most Common Pan Conversions

Quick reference for popular pan size swaps

Recipe Calls For	You Have	Multiply By	Baking Time
9 inch round	8 inch round	0.78x	+5-10 min (deeper)
8 inch round	9 inch round	1.27x	-5 min (shallower)
Two 9 inch rounds	9×13 inch pan	1.0x (same!)	Same or +5 min
9 inch round	8×8 square	1.0x (same!)	Same time
9×13 inch pan	Two 8 inch rounds	0.85x	-5 to 10 min
9 inch round	9×5 loaf pan	0.70x	+15-20 min
8 inch round	6 inch round	0.56x	+5 min (deeper)
9 inch round	6 inch round	0.44x	+5-8 min
Two 8 inch rounds	Two 9 inch rounds	1.27x	-5 min

How to Use a Cake Pan Converter

The formula: Scaling factor = Area of your pan ÷ Area of recipe pan. For round pans: Area = π × radius². For square/rectangular pans: Area = length × width. Multiply ALL ingredients by this factor.

When you need to bake a cake in a different pan size than the recipe calls for, you cannot simply guess — the wrong amount of batter leads to either an overflowing pan or a very thin, dry cake. The cake pan converter calculates exactly how much to increase or decrease your recipe ingredients.

Example: Converting 9-inch to 8-inch Round Pan

A 9-inch round pan has an area of 63.6 square inches. An 8-inch round pan has an area of 50.3 square inches. Divide 50.3 ÷ 63.6 = 0.79. Multiply all ingredients by 0.79. If the recipe calls for 2 cups of flour, use 1.58 cups (about 1½ cups + 1 tablespoon).

Adjusting Baking Time When Changing Pan Size

When using a smaller pan, the batter is deeper, so it needs more time. Add 5-15 minutes and check with a toothpick. When using a larger pan, the batter is shallower and will bake faster. Start checking 10 minutes earlier than the original recipe time.

Important: Always check doneness with a toothpick — insert it into the center of the cake. When it comes out with a few moist crumbs (not wet batter), the cake is done. Do not rely only on time.

Cake Pan Baking Tips

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Fill Pan 2/3 Full

Never fill a cake pan more than 2/3 full. Cakes rise during baking — too full and it overflows, too empty and the cake is flat and dry.

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Adjust Baking Time

Smaller/deeper pans need more time. Larger/shallower pans need less. Check 10 minutes before the recipe time when using a larger pan.

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Grease Properly

Always grease AND flour your pan, or use parchment paper. For bundt pans, grease every crevice carefully — stuck cakes ruin beautiful designs.

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Adjust Temperature

When using a deeper pan, reduce temperature by 25°F and bake longer. This prevents the outside from burning before the center sets.

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Round vs Square

A 9-inch round pan (64 sq in) and an 8×8 square pan (64 sq in) have nearly the same area — you can swap them 1:1 without changing the recipe.

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Dark vs Light Pans

Dark pans absorb more heat and bake faster. If switching from light to dark pans, reduce oven temperature by 25°F to prevent over-browning.

Frequently Asked Questions

Common cake pan conversion questions answered

How do I convert a 9-inch cake pan recipe to an 8-inch pan? +

To convert from a 9-inch to an 8-inch round pan, multiply all ingredients by 0.79. A 9-inch round pan has an area of 63.6 square inches, while an 8-inch pan has 50.3 square inches. Divide 50.3 by 63.6 to get 0.79. So if the recipe calls for 2 cups flour, use 1.58 cups. The batter will be slightly deeper in the 8-inch pan, so add 5-10 minutes to the baking time.

Can I use a 9×13 pan instead of two 9-inch round pans? +

Yes! A 9×13 inch pan (117 square inches) and two 9-inch round pans (64 × 2 = 128 square inches) are very close in total area. Use the recipe as written — no ingredient changes needed. The baking time may be similar or slightly shorter in the 9×13 since the batter is slightly shallower. This is one of the most common and convenient pan swaps in baking.

Is an 8×8 square pan the same as a 9-inch round pan? +

Almost! An 8×8 inch square pan has an area of 64 square inches, and a 9-inch round pan also has an area of 63.6 square inches — nearly identical. You can swap these pans 1:1 without changing any ingredient amounts. The baking time will be very similar too, so no adjustments are needed for this particular swap.

How do I convert a cake recipe to a different size pan? +

Calculate the area of both pans. For round pans use: area = 3.14159 × (diameter/2)². For square/rectangular pans: area = length × width. Then divide your pan’s area by the recipe pan’s area to get the scaling factor. Multiply all ingredients by this factor. For example: converting 9-inch (63.6 sq in) to 6-inch (28.3 sq in) = 28.3 ÷ 63.6 = 0.44 — use 44% of all ingredients.

How much bigger is a 9-inch pan than an 8-inch pan? +

A 9-inch round pan (63.6 sq in) is about 27% larger than an 8-inch round pan (50.3 sq in). This means if you use a 9-inch pan when the recipe calls for an 8-inch, your cake layers will be noticeably thinner. You would need to multiply the recipe by 1.27 to get the proper cake height in the larger pan. This is why following the correct pan size matters for layer cakes.

Can I bake a 9×13 cake in two round pans? +

Yes! A 9×13 inch pan (117 sq in) holds approximately the same batter as two 9-inch round pans (128 sq in total). Use the recipe as written, dividing the batter equally between the two round pans. Baking time will be similar, but check about 5 minutes earlier since round pans may bake slightly faster. This is perfect for converting a sheet cake recipe into a layer cake.

How do I adjust baking time when changing pan sizes? +

When using a smaller pan (deeper batter): add 5-15 minutes to baking time and reduce temperature by 25°F. When using a larger pan (shallower batter): start checking 10 minutes early and the cake may brown faster. Always test doneness with a toothpick — insert it into the center and it should come out with a few moist crumbs. Never rely only on time when changing pan sizes.

Can I use a 10-inch pan instead of a 9-inch pan? +

Yes, but your cake layers will be thinner. A 10-inch pan (78.5 sq in) is 23% larger than a 9-inch (63.6 sq in). If you use your original recipe in the 10-inch pan, the layers will be noticeably shorter. For proper height, multiply all ingredients by 1.23. Alternatively, make the recipe as-is but be aware the cake will be flatter and may need less baking time.

How do I convert a round cake pan to a square pan? +

Compare the areas of both pans. A 9-inch round pan has 63.6 square inches. An 8×8 square pan has 64 square inches — almost identical! For other sizes: calculate round pan area with π × r², and square pan area with length × width. Divide one by the other to get your scaling factor. Round-to-square conversions are common because the area ratio is easy to calculate.

What is the standard cake pan size? +

The most common standard cake pan sizes in the US are: 9-inch round (the most common single layer), two 8-inch rounds (the most common for layer cakes), and 9×13 inch rectangular (the most common for sheet cakes). In the UK and Europe, 8-inch (20cm) and 9-inch (23cm) round pans are standard. Most American recipes are written for 9-inch round or 9×13 inch pans.

How many cups of batter does a 9-inch cake pan hold? +

A standard 9×2 inch round cake pan holds about 8 cups of batter. However, you should only fill it 2/3 full (about 5-6 cups) to allow room for the cake to rise. An 8-inch round pan holds about 6 cups (fill to 4 cups). A 9×13 inch pan holds 14-15 cups (fill to 10 cups). A 6-inch pan holds 4 cups (fill to 2-3 cups).

Can I bake a cake in a pan that is not the right size? +

Yes! That is exactly what this converter is for. The key is adjusting the ingredient amounts using the area ratio so your pan is filled to the right depth (about ⅔ full). Then adjust baking time accordingly — deeper batter needs more time, shallower needs less. The only pans that are difficult to substitute are Bundt pans, tube pans, and angel food cake pans because of their unique shapes and center tube.