Where the 10×15" jelly roll sits among sheet pans
| Pan | Holds (brim) | Batter (⅔) | Bake area | Depth |
|---|---|---|---|---|
| 10×15" jelly roll (10½×15½" inside, 1" deep) | 10 cups | 6¾ cups | 163 sq in | 1″ |
| 13×18" half sheet (1" deep) | 13 cups | 8¾ cups | 234 sq in | 1″ |
Swapping a recipe into or out of this pan
These hold about the same batter but bake differently — the batter sits at a different depth (shallower runs faster, deeper slower), or a centre tube changes how heat reaches it: 9" square (10 cups; batter 0.6″ → 1.2″ deep), 9" springform (10 cups; batter 0.6″ → 1.5″ deep), 10" round (11 cups; batter 0.6″ → 1.2″ deep), 3"-deep 8" round (9 cups; batter 0.6″ → 1.9″ deep). Treat these as a change of bake, not a straight swap.
Check the batter comes no more than about two-thirds up the new pan. The cake pan converter works out the exact time and temperature shift for any pair.
Filling guidance: two-thirds is the working rule for butter and oil cakes. Batters with big oven spring — angel food, chiffon, some sponges — want more headroom, and dense batters (brownies, blondies) tolerate fuller pans because they barely rise.