Baking Pan Converter
Recipe is for one pan size but you have a different one? Auto-calc recipe multiplier based on pan surface area.
Multiply ALL recipe ingredients by this number to fit the target pan.
⏱️ Bake time adjustment
✓ Same bake time (equal pan height)
💡 Adjustment Tips
- • For multiplier 0.5×-2×: linear scaling works accurately.
- • Multiplier 3× and up: reduce leavening (baking powder, yeast) by 10-15% — too much causes over-rise and collapse.
- • Multiplier < 0.5: round small amounts to nearest 1/8 tsp (not 0.125 tsp).
- • Always toothpick test before removing — actual bake time can vary ±5-10%.
Sources: King Arthur Baking · Joy of Baking · Rose Levy Beranbaum "The Baking Bible"
Frequently Asked Questions
Recipe is for 9-inch round, I have an 8×8 square — can I use it?▾
Yes! Multiplier calculated by surface area. 9-inch round = 64 in², 8×8 square = 64 in². Multiplier ≈ 1.0× — basically equivalent. Bake time similar since pan heights match.
Why use surface area, not diameter?▾
Because batter spreads across the full pan surface, and batter thickness determines bake time and texture. Diameter 9" vs 8" differs only 11%, but AREA differs 27% — that's what matters for batter volume.
Loaf pan vs round pan — what's different?▾
Loaf is taller (6cm) vs round/square (5cm). Thicker batter = longer bake (~5-10% per cm extra). Also lower oven temp by 10°C so the crust doesn't burn before the center cooks.
Box cake mix to cupcakes scaling?▾
1 box cake mix (~432g) fits: 1 round 9" pan or 24 standard cupcakes. To convert from 9" pan to 12 cupcakes = multiplier 0.5×.
Brownie recipe for 8×8 but I only have 9×9 — different result?▾
Multiplier 1.27× (81/64). Scale recipe by 1.27 for same thickness. If you keep recipe as-is (× 1), brownies will be thinner and dry — fudgy texture lost.
Can I use disposable aluminum foil pan when recipe specifies glass (Pyrex)?▾
Pyrex (glass) heats slowly and evenly — lower oven temp 10-15°C from original recipe. Aluminum foil heats fast but cools fast — same temp but reduce bake time 5-10%.