Home / Pan Substitutions /9×5 loaf pan → 7×11 rectangle
9×5 loaf to 7×11
pan conversion.
The 9×5 loaf pan has 45 sq in of base area; the 7×11 rectangle has 77 sq in. Scale factor: 1.71×.
The numbers
- 9×5 loaf pan area
- 45 sq in
- 7×11 rectangle area
- 77 sq in
- Scale factor
- 1.71×
- Calculation
- 77 ÷ 45
Pan comparison
| Pan | Base area | Role |
|---|---|---|
| 9×5 loaf pan | 45 sq in | Original |
| 7×11 rectangle | 77 sq in | Substitute |
Ingredient scaling preview
A typical recipe scaled by 1.71× from 9×5 loaf pan to 7×11 rectangle.
| Ingredient | 9×5 loaf pan | 7×11 rectangle (1.71×) |
|---|---|---|
| All-purpose flour | 2 cups | 3 ⅜ cups |
| Granulated sugar | 1 cup | 1 ¾ cup |
| Butter | ½ cup | ⅞ cup |
| Eggs | 2 eggs | 3 eggs |
| Baking powder | 1 tsp | 1 ¾ tsp |
| Milk / liquid | ½ cup | ⅞ cup |
Batter capacity by depth
Approximate cups of batter each pan holds at common fill depths.
| Fill depth | 9×5 loaf pan | 7×11 rectangle |
|---|---|---|
| 1.0″ | 3.1 cups | 5.3 cups |
| 1.5″ | 4.7 cups | 8.0 cups |
| 2.0″ | 6.3 cups | 10.7 cups |
Why 1.71× — the area math
The 7×11 rectangle has a base area of 77 sq in (7 × 11 = 77 sq in), holding about 8.0 cups of batter at a 1.5″ depth. The 9×5 loaf pan has a base area of 45 sq in (9 × 5 = 45 sq in), holding about 4.7 cups. Scale factor = 77 ÷ 45 = 1.710, rounded to 1.71×. Multiply every ingredient in the original 9×5 loaf recipe by 1.71 to fill the 7×11 to the same batter depth.
Bake time and temperature
Moving from the 9×5 loaf to the larger 7×11 spreads batter 42% shallower — reduce bake time by about 16 minutes and start checking at the 12-minute-early mark. No temperature change needed when moving from the 9×5 loaf to the 7×11 — the batter depth is similar enough that existing recipe temps work fine. Always rely on a toothpick, skewer, or probe thermometer for doneness — timing varies by oven calibration, batter density, and how full the pan is.
Depth and texture in the 7×11
Batter sits ~42% shallower in the 7×11 than in the 9×5 loaf (area gap: 32 sq in) — expect crispier edges and a tighter crumb if you push past the adjusted time. For cakes, a shallower batter produces a crispier crust and tighter crumb; a deeper batter produces a moister, denser centre. For brownies and bars, a deeper pour gives fudgier results while a shallower pour gives cakier, crispier edges. Adjust baking time — not temperature — as your first lever.
Loaf pans and batter depth
The 9×5 loaf is tall and narrow relative to its 45 sq in base — batter runs roughly 1.71× deeper in the loaf compared with a pan the size of the 7×11. When converting from the 9×5 loaf, that depth difference translates to about 42% longer heat-penetration time to the centre. Use a probe thermometer: quick breads are done at 190–200°F / 87–93°C and cakes at 205–210°F / 96–99°C at the centre.
Going the other way: 7×11 to 9×5 loaf
To scale a 7×11 recipe for the 9×5 loaf, use 0.58× (45 ÷ 77 = 0.584, rounded to 0.58). This is close to halving — using 0.5× is an acceptable shortcut, accepting slightly more batter depth in the 9×5 loaf than the original 7×11 recipe.
Recipes that work for this swap
- Sheet brownies
- Focaccia
- Slab cake
- Cornbread
- Sheet-pan cookie bars
Common mistakes with this swap
- 1 Not reducing bake time — the thinner batter in the 7×11 bakes ~16 min faster than in the 9×5 loaf
- 2 Skipping the lining — the 7×11 benefits from a parchment sling to lift bars or slab cakes out cleanly
- 3 Filling too high — the 7×11 has 32 sq in more base area; don't over-scale the recipe
Frequently asked questions
- What is the scale factor from a 9×5 loaf pan to a 7×11 pan?
- 1.71× — calculated as 77 sq in ÷ 45 sq in = 1.711, rounded to 1.71. Multiply every ingredient by 1.71 when converting the recipe.
- How do I adjust bake time when switching from a 9×5 loaf to a 7×11?
- Moving from the 9×5 loaf to the larger 7×11 spreads batter 42% shallower — reduce bake time by about 16 minutes and start checking at the 12-minute-early mark.
- What is the scale factor from a 7×11 back to a 9×5 loaf?
- 0.58× — the reverse calculation: 45 ÷ 77 = 0.584, rounded to 0.58.
- Does pan material matter when swapping a 9×5 loaf for a 7×11?
- Yes — and the 32 sq in difference between the 9×5 loaf and 7×11 amplifies material effects. Dark metal absorbs more heat than light aluminium — reduce temperature by 25°F / 14°C when moving to a darker pan of the 7×11 size. Glass and ceramic conduct heat more slowly than metal, so add 10–15 minutes when switching to glass or ceramic at the 1.71× scale.
- Can I use the Recipe Converter Pro tool to apply the 1.71× scale factor from 9×5 loaf to 7×11?
- Yes — paste your 9×5 loaf ingredient list into the converter, enter 1.71 as the scale factor, and every quantity updates to kitchen-friendly fractions instantly. The 7×11 holds about 8.0 cups of batter at a standard 1.5″ depth, so you can also use that as a fill-level reference.
Related guides
Apply the 1.71× scale factor to your recipe
Paste your ingredient list, enter 1.71 as the scale factor — every quantity updates to clean kitchen fractions instantly.