GEOMETRIC SURFACE AREA SCALER
Recipe Scaler & Pan Converter
Swapping an 8x8 pan for a 9x13 without adjusting ingredients causes dried-out thin casseroles. Calculate exact geometric multipliers, batter depth changes, and oven time shifts.
FROM: ORIGINAL RECIPE PAN
Surface Area:64 sq in
Approx Volume:8 cups
TO: YOUR AVAILABLE PAN
Surface Area:117 sq in
Approx Volume:14 cups
4
8
PAN AREA MULTIPLIER
1.83x
Multiply single-layer ingredients by 1.83
SERVINGS SCALER
2x
From 4 to 8 portions
BATTER THICKNESS
IDENTICAL
Relative to original pan depth
TIME & TEMPERATURE MODIFIER:
• Time: Standard bake time.
• Temperature: Maintain original oven temp.
INDEXED BAKING DISH & PAN SURFACE AREAS
| Pan Geometry | Dimensions | Surface Area (Sq In) | Approx Capacity | Shape |
|---|---|---|---|---|
| 8-inch Round Cake Pan | 8" diameter | 50.3 sq in | 6 cups | round |
| 9-inch Round Cake Pan | 9" diameter | 63.6 sq in | 8 cups | round |
| 8x8-inch Square Baking Dish | 8" x 8" | 64 sq in | 8 cups | square |
| 9x9-inch Square Baking Dish | 9" x 9" | 81 sq in | 10 cups | square |
| 9x13-inch Casserole / Sheet Pan | 9" x 13" | 117 sq in | 14 cups | rectangular |
| 7x11-inch Rectangular Dish | 7" x 11" | 77 sq in | 9 cups | rectangular |
| 8.5 x 4.5-inch Standard Loaf Pan | 8.5" x 4.5" | 38.3 sq in | 6 cups | rectangular |
| 9 x 5-inch Large Loaf Pan | 9" x 5" | 45 sq in | 8 cups | rectangular |
| Half Sheet Pan (Baking Rimmed) | 13" x 18" | 234 sq in | 20 cups | rectangular |
| 10-inch Cast Iron Skillet | 10" diameter base | 78.5 sq in | 9 cups | round |
| 12-inch Cast Iron Skillet | 12" diameter base | 113.1 sq in | 12 cups | round |