Baking Pan Converter
Convert between baking pan sizes and scale recipes by pan area.
Original Pan
New Pan
Scaling Factor
multiply recipe amounts by this
Original Pan Area
New Pan Area
Recommendation
Why Pan Area Matters
When you swap one baking pan for another, what really changes is the surface area available to hold the batter. A given volume of batter spread across a larger area becomes shallower; spread across a smaller area it becomes deeper. Batter depth directly affects how a cake bakes: deeper batter needs more time and a gentler heat to cook through without burning the edges, while shallower batter bakes faster and can dry out.
This converter compares the base area of your original and new pans and gives you a single scaling factor. Multiply every ingredient amount in your recipe by that factor to keep the same batter depth, so your bake time and texture stay close to the original.
Common Pan Sizes
| Pan | Dimensions | Approx. Area |
|---|---|---|
| 8″ round | 8″ diameter | ~50 in² |
| 9″ round | 9″ diameter | ~64 in² |
| 8″ square | 8 × 8″ | 64 in² |
| 9″ square | 9 × 9″ | 81 in² |
| 9 × 13″ | 9 × 13″ | 117 in² |
| Loaf (9 × 5″) | 9 × 5″ | 45 in² |
Adjusting Bake Time
Keep the oven temperature the same as the original recipe, but expect the bake time to change with pan size:
- Larger pan (deeper batter is reduced): the batter spreads thinner and bakes faster – start checking 5–10 minutes early.
- Smaller pan (deeper batter): the batter is deeper and needs more time – add several minutes and tent with foil if the top browns too quickly.
- Always test doneness: a toothpick inserted in the center should come out clean or with a few moist crumbs, regardless of the printed time.
- Avoid overfilling: fill pans no more than two-thirds full to leave room for rise.
Note: This converter scales recipes by pan base area and assumes a uniform batter depth. Pan height, material, and oven differences can still affect results, so always check doneness rather than relying on time alone.