Baking Pan Size Conversion & Recipe Scaling Calculator
Convert cake, brownie, and baking recipes between round, square, rectangular (9x13), loaf, and bundt pans: calculate exact surface area scaling ratios, recipe ingredient multipliers, and baking time adjustments.
Original Recipe Pan vs Your Pan
Mins
°F
Recipe Ingredient Multiplier
DIRECT 1:1 RECIPE SUBSTITUTE
1.09 x
Target area 127.2 sq in vs original 117.0 sq in (+8.7% difference)
Adjusted Bake Time
26 – 28 Mins
Watch for clean toothpick test
Oven Temperature
350 °F (177°C)
Maintain original temperature
Pan Conversion Details
Original Recipe Pan Area:
117.0 sq inches
Target Pan(s) Total Area:
127.2 sq inches (2 pans)
Batter Depth Comparison:
Nearly identical batter thickness (~1.0x)