Cake shape
Diameter (inches)
Layers
Layer height
Filling thickness
Filling (between layers)
Exterior frosting
Finish
Safety margin
Your 8" round · 3 layers × 2" tall
Filling total
2 gaps × 2 cups each
4 cups
860 g
Crumb coat (⅛")
2 cups
430 g
Final coat (¼")
4 cups
860 g
Exterior total (American buttercream)
6 cups
1290 g
Verified math: pan area × thickness ÷ 14.4375 in³/cup. Densities per filling type (American buttercream 215 g/cup, per Sugar & Sparrow).