π₯£ Cake Batter Calculator
Right amount of batter for any pan, every time.
How to Use This Calculator
Enter your pan dimensions and pick a fill level. You get cups of batter plus the pan total capacity for reference.
The Formula
Batter = cups x fill level
One US cup equals 14.44 cubic inches. Cake batter has roughly the density of the finished cake, so volume math translates directly. Always round down slightly because batter aerates as it bakes.
Worked Example
9x13x2 inch pan at two-thirds: volume = 9 x 13 x 2 = 234 cu in = 16.2 cups capacity. Batter = 16.2 x 0.67 = 10.9 cups. A standard box mix makes about 5 cups, so you need just over two boxes.
How Full Should Pans Be?
Fill cake pans one-half to two-thirds full. Half is safer for deep pans and rich batters that rise a lot; two-thirds works for shallow pans and sturdy batters. Overfilled pans dome, crack, or overflow. If you have extra batter, make cupcakes rather than overfilling. Underfilled pans bake faster and dry out, so match your batter to the right pan size instead of spreading thin.
Scaling Recipes Up or Down
When scaling, leavening does not always scale linearly. Doubling baking powder exactly can give a soapy taste; many bakers use 1.5x leavening when doubling. Eggs scale fine by weight. This calculator scales batter by volume, which is accurate for the pan math; adjust leavening separately if you are more than doubling.
Testing New Pans
When trying an unfamiliar pan, do a water test first: pour measured water to the halfway mark to learn its true capacity. Novelty pans with intricate shapes hold less than their dimensions suggest. For Bundt pans, never exceed two-thirds full or the center tube overflows and the cake sticks.
Frequently Asked Questions
How full should I fill a cake pan?
Fill cake pans one-half to two-thirds full. One-half gives a flat top with little doming, two-thirds gives a nicely domed cake you can level. Never fill more than three-quarters or the batter will overflow.
How many cups of batter does a 9x13 pan need?
A 9x13 inch pan holds about 14 cups total and needs 10 to 12 cups of batter (two-thirds full). An 8 inch round needs about 4 cups, a 9 inch round about 5 cups.
Can I use this for cupcakes?
Yes. A standard cupcake needs about 1/4 cup (4 tablespoons) of batter, filled two-thirds full. A 12-cup muffin tin needs 3 cups total. Mini cupcakes need about 1 tablespoon each.
What if my recipe makes too much batter?
Extra batter keeps as cupcakes: fill lined tins and bake 15 to 20 minutes at the same temperature. Or bake a thin sheet cake layer for trifles. Never save raw leavened batter for later; the baking powder loses power.
How do I scale batter for a different pan?
Scale by volume ratio. Divide the new pan volume by the old pan volume and multiply every ingredient. This calculator does the math and tells you the fill level so you do not overfill.