Loaf Pan Sizes: 9x5 vs 8.5x4.5 Loaf Pan Conversion Guide

The two standard loaf pan sizes are 9 x 5 inches, which holds about 8 cups, and 8.5 x 4.5 inches, which holds about 6 cups. That means a 9 x 5 pan has roughly a third more room, so a recipe written for 8.5 x 4.5 will bake up lower and faster in a 9 x 5, while a 9 x 5 recipe can overflow an 8.5 x 4.5 pan. Below you will find a size chart, how to measure your own pan, and simple ways to convert a recipe.

Common loaf pan sizes and how much they hold

Loaf pan sizes are measured across the top inside edges, length by width. Most pans have slightly sloped sides, so the bottom is a little smaller than the top. The volumes below are approximate and vary by depth and slope.

9 x 5 vs 8.5 x 4.5 loaf pan: what is the real difference?

Half an inch does not sound like much, but it adds up in both directions. The extra length and width give a 9 x 5 pan about 2 more cups of space. In practice:

• In a 9 x 5 pan, batter spreads out more. Loaves are a little shorter and wider, and they bake a bit faster because the batter is shallower.
• In an 8.5 x 4.5 pan, the same batter sits deeper. Loaves rise taller with a more rounded top, which many bakers like for sandwich bread.

Neither size is right or wrong. What matters is matching the pan to the amount of batter or dough your recipe makes. A common guideline for yeast bread: a recipe with about 3 cups of flour suits an 8.5 x 4.5 pan, and one with about 4 cups of flour suits a 9 x 5 pan.

How do you measure a loaf pan?

If your pan is not stamped with a size, it only takes a minute to find out.

1. Measure inside the top edges. Use a ruler to measure length and width from inside rim to inside rim. Do not include the lip or handles.
2. Measure the depth. Stand the ruler straight up inside the pan, from the bottom to the top edge.
3. Check the volume with water. Fill the pan to the brim with water, one cup at a time, and count. This is the most reliable number for converting recipes, because it accounts for sloped sides and rounded corners.

How to convert a loaf pan recipe

Baking an 8.5 x 4.5 recipe in a 9 x 5 pan

This is the easy direction. The batter will fit with room to spare.

• Bake the recipe as written, but start checking for doneness 5 to 10 minutes early.
• Expect a slightly lower, flatter top.
• If you want the same height, scale the recipe up by about a third (multiply ingredients by 1.33). For recipes with eggs, rounding to a 1.5x batch is often simpler.

Baking a 9 x 5 recipe in an 8.5 x 4.5 pan

This is where overflows happen.

• Fill the pan no more than two-thirds full for quick breads and cakes.
• Bake any extra batter as a few muffins or in a mini loaf pan.
• Expect a slightly longer bake time, and tent the top loosely with foil if it browns before the center is set.

Using volume to convert any pan

For any two pans, divide the volume of the new pan by the volume of the original. If your recipe calls for an 8-cup pan and you have a 6-cup pan, 6 divided by 8 is 0.75, so make three-quarters of the recipe. This works for loaf pans, square pans and round pans alike. For more on matching bakes to pans, see our baking pan guide.

How to tell when a loaf is done

Because pan size changes bake time, rely on doneness cues more than the clock:

• Quick breads (banana, zucchini, pumpkin): a toothpick or thin skewer inserted in the center should come out clean or with a few moist crumbs.
• Yeast breads: a common guideline is about 190°F inside for soft, enriched sandwich loaves and about 200 to 210°F for lean, crusty loaves. The loaf should also sound hollow when tapped on the bottom.
• Meatloaf: FoodSafety.gov lists 160°F for ground beef and pork, and 165°F for ground chicken or turkey.

Bakken loaf pans and their actual sizes

Our loaf pans come in a few sizes, so here is how they line up with the standard sizes above. All measurements come from the product specs.

Which one fits your recipe?

• For 9 x 5 recipes: the 9 x 4.7 inch ceramic pan has a similar footprint. At 2.3 inches deep it is a little shallower than many classic 9 x 5 pans, so fill it about two-thirds full and bake any extra batter as muffins.
• For larger batches: the 11-inch pans are bigger than a 9 x 5 by length and width. They suit large meatloaves or a recipe scaled up by about 1.5x. A standard 9 x 5 recipe will fit easily but bake lower and sooner, so start checking early.
• For flexibility: the set of 4 in graduated sizes from about 7 to 11 inches lets you match the pan to the batch, from a mini gift loaf to a big family meatloaf.

Shop all loaf pans to see every color and set.

Quick answers

How many cups does a 9 x 5 loaf pan hold?

About 8 cups, compared with about 6 cups for an 8.5 x 4.5 pan. Depth and slope vary, so fill yours with water for an exact number.

Can I use a 9 x 5 pan instead of 8.5 x 4.5?

Yes. Your loaf will be a bit shorter and will likely finish 5 to 10 minutes sooner, so start checking early.

How full should a loaf pan be?

About two-thirds full for quick breads and cakes. This leaves room to rise without spilling over.

What size is a standard loaf pan?

In the US, 9 x 5 inches is the most common standard size, with 8.5 x 4.5 inches a close second. Many bread recipes specify which one they were tested in.

Sources

• King Arthur Baking: Pan Substitution Guide
• FoodSafety.gov: Safe Minimum Internal Temperatures