Baking Guides
8 Inch to 9 Inch Cake Pan: The Exact Conversion (Plus Every Other Size)
A recipe for an 8-inch pan, but yours is 9 inches. One multiplier applied to everything: ×1.27.
The multiplier
200 g flour becomes 254 g; 2 eggs become 2.5 — more below. Temperature unchanged; test with a skewer.
Round pan multiplier table
| from \ to | 4" | 5" | 6" | 7" | 8" | 9" | 10" | 12" |
|---|---|---|---|---|---|---|---|---|
| 4" | 1 | 1.56 | 2.25 | 3.06 | 4.00 | 5.06 | 6.25 | 9.00 |
| 5" | 0.64 | 1 | 1.44 | 1.96 | 2.56 | 3.24 | 4.00 | 5.76 |
| 6" | 0.44 | 0.69 | 1 | 1.36 | 1.78 | 2.25 | 2.78 | 4.00 |
| 7" | 0.33 | 0.51 | 0.73 | 1 | 1.31 | 1.65 | 2.04 | 2.94 |
| 8" | 0.25 | 0.39 | 0.56 | 0.77 | 1 | 1.27 | 1.56 | 2.25 |
| 9" | 0.20 | 0.31 | 0.44 | 0.60 | 0.79 | 1 | 1.23 | 1.78 |
| 10" | 0.16 | 0.25 | 0.36 | 0.49 | 0.64 | 0.81 | 1 | 1.44 |
| 12" | 0.11 | 0.17 | 0.25 | 0.34 | 0.44 | 0.56 | 0.69 | 1 |
Read: original in the left column, target across. 6→8 inch is ×1.78, not "a third more".
Eggs
2.5 eggs isn't a thing: beat a third and weigh the fraction (a large egg ≈ 50 g), or round up. Leavening scales with everything else.
The other way (9 → 8)
×0.79. Keep one decimal — rounding hurts more when scaling down.
If you scale often
Bake Scaler (by Xin He Jia) computes the multiplier from the actual shape (11 shapes plus by-total-volume), applies it to every ingredient with whole-egg suggestions, multiple pans in one calculation. Fully offline, no account, one-time purchase — no ads, no subscription, no in-app purchases.
Quick reference
- 8" → 9": everything ×1.27.
- 9" → 8": ×0.79.
- Eggs: weigh the fraction (~50 g) or round.
- Temperature unchanged.
Bake Scaler
Scale any recipe to any pan in a second. 11 shapes, multiple pans, whole-egg suggestions, unit guard. One-time purchase, no ads, no subscription, fully offline.
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