A typical box of cake mix makes **about 4–5½ US cups of batter** when prepared as directed. The exact yield varies by mix; that range comes from [Wilton’s cake guide](https://blog.wilton.com/wedding-cake-guide/).

For your nonstandard pan, you can estimate the amount this way:

1. Use a measuring cup to fill the pan with water, counting the cups up to the rim.
2. Plan on batter equal to **½–⅔ of that capacity**, leaving room for the cake to rise. [Wilton recommends this fill level for ordinary cake pans](https://wilton.com/baking-inspiration/cake-baking-serving-guide/).
3. Empty and dry the pan before adding batter.

For example, a pan holding **8 cups of water** would need roughly **4–5⅓ cups of batter**—about one box. For an exact yield from your favorite mix, measure one prepared batch and note it for future cakes.