Pan Size Converter
Convert cake and baking pans by volume — not just diameter labels. Enter your pan, see full capacity and batter fill in cups, and match the closest standard pans.
≈ 127.2 in³ · 2.08 L
Closest equivalent pans (±25% volume)
- 8.8 cups · 100% of yours
- 8.9 cups · 101% of yours
- 9.4 cups · 106% of yours
- 10.4 cups · 118% of yours
- 7 cups · 79% of yours
- 10.9 cups · 123% of yours
What Is a Pan Size Converter?
A pan size converter (cake pan volume calculator) compares baking pans by how much batter they hold, not only by the number printed on the side. Swapping an 8″ round for a 9″ square works better when you match cups of volume rather than guessing.
How to Convert Pan Sizes by Volume
- Measure inside dimensions (inches) — diameter or length × width, and depth.
- Compute volume and practical batter fill (default ~⅔ full).
- Pick an equivalent pan within about ±25% volume; adjust bake time and temperature as needed.
Pan Volume Formulas
Example: 9″ Round vs 8″ Square
A 9×2 round holds about 8 cups to the rim. An 8×2 square holds about 7 cups. They are close — expect slightly more batter height in the square or scale the recipe by volume ratio if needed. A 9×13×2 sheet is roughly double one 9″ round.
Frequently Asked Questions
How do I convert cake pan sizes?
Match pan volumes (area × depth). Similar cup capacity means closer bake results — always test for doneness.
How many cups does a 9-inch round pan hold?
About 8 cups full (9×2″). Fill ~⅔ for batter so it does not overflow.
Can I use a 9×13 pan instead of two 9-inch rounds?
Often yes by volume — adjust time (sheet cakes usually bake faster). Watch the center.
How is pan volume calculated?
Round: πr²h. Rectangular: L×W×h. Convert cubic inches to cups with ÷ 14.4375.
Should I fill a cake pan to the top?
No — about two-thirds full is the usual target (set fill % above).
Is this pan size converter free?
Yes — free, no signup, fully private in the browser.