Pan Size Converter
Converting 9-inch round pan to 10-inch round pan? Find out exactly how to scale your recipe and adjust bake time.
Units
Recipe scaling
scale ingredients up × 1.24
Area ratio: 79 / 63.62 sq in
If you scale the recipe
Keep the original temperature and bake time
Area scaling keeps the batter depth similar. Start checking doneness about 5 minutes early.
If you keep the full batch
The full batch will be about 81% as deep
Keep the temperature, but start checking early because the thinner layer can bake faster.
Popular conversions
9-inch round pan to 10-inch round pan: practical conversion
The target has 1.24× the base area of the original. Scale the ingredients by that amount to keep batter depth close to the original; the shallower-batter comparison below applies only when you keep the full batch.
| Original recipe | Target-pan amount | Practical handling |
|---|---|---|
| 200 g flour | 248 g | Weighing keeps the scaled amount precise. |
| 3 large eggs | About 3.73 eggs | Beat the eggs, then weigh about 186 g of beaten egg. |
| 1 cup liquid or sugar | 1.24 cups (about 1 1/4 cups) | Use a measuring cup for liquids; weigh dry ingredients where possible. |
If you keep the full batch: shallower batter
With the same 4 cups of batter, the layer is about 0.91 in (2.31 cm) deep in the 9-inch round pan, versus 0.73 in (1.86 cm) in the 10-inch round pan.
Bake-time starting point
For a scaled batch, keep the original temperature and time, then start checking about 5 minutes early. For a full batch in the target pan, plan on about 22–28 minutes for a cake that takes about 25–30 minutes in the original 9-inch pan. Pan material, recipe density, and the intended texture can shift the final time.
What Matters for This Conversion
- - Use roughly 1.23x to keep depth similar.
- - Unscaled batter in 10-inch pan bakes thinner and faster.
- - Start doneness checks earlier if not scaling up.
FAQ
How much bigger is a 10-inch round than 9-inch?
About 23% more area.
Can I use same batter amount?
Yes, but layer will be thinner and timing changes.
Should I increase ingredients?
If you want original depth and height, scale up.
Will frosting quantities change?
Surface area changes can increase frosting needs.