How many cups of dry cake mix are in a 15.25 oz box?

Determining how many cups of dry cake mix come in a standard 15.25 oz box is a common baking question. The answer ultimately depends on the specific brand and variety of cake mix. However, most boxes of dry cake mix contain around 4 to 5 cups of dry mix.

Quick Answer

Most standard size boxes of dry cake mix (around 15 ounces) contain between 4-5 cups of dry cake mix. So for a 15.25 oz box you can expect around 4 1/4 to 5 1/4 cups of cake mix.

Dry Cake Mix Cups per Ounce

As a general rule of thumb, dry cake mix contains approximately 1/4 cup of mix per ounce. So a 15.25 oz box would contain approximately 3.8125 cups of mix (15.25 x 0.25). Of course this is just an estimate and the actual amount can vary slightly based on the brand and specific variety of cake mix.

Factors that Affect Cups per Box

There are a few key factors that can affect how many cups of dry cake mix come in a standard 15.25 oz box:

  • Brand – Different brands may have slightly different densities and therefore cup volumes for the same weight.
  • Variety – The specific type of cake mix, such as white, chocolate, spice, etc. can affect density.
  • Sift – Some brands may advertise cups based on sifted mix, which takes up more volume.
  • Settling – Settling of dry ingredients during shipping and storage can compress the mix over time.

Due to these factors, it’s always best to check the exact cups listed on the packaging when starting a recipe. But most of the time a 15.25 oz box will be in the 4 to 5 cup range.

Typical Cups per Box by Brand

Here is an overview of the typical cups of dry cake mix found in a standard 15.25 oz box for some popular brands:

Brand Cups per 15.25 oz
Betty Crocker 4 1/4
Duncan Hines 4 1/2
Pillsbury 4 3/4
Boxed Baking 4 1/2

As you can see, Duncan Hines and Betty Crocker contain around 4 1/4 to 4 1/2 cups per 15.25 oz box. Pillsbury tends to have a greater volume at 4 3/4 cups. And store brands like Boxed Baking are typically in the 4 1/2 cup range.

Weight Versus Volume

Dry cake mix quantities are usually listed by weight (ounces) rather than by volume (cups). This is because weight is a more accurate and consistent measurement than volume, especially for dry powders. The density and how compacted the powder is can vary, meaning the cups per ounce ratio may not be perfectly consistent. So for accuracy in recipes, brands tend to list the weight.

Converting Oz to Cups

In some cases you may need to convert the weight in ounces to approximate cup measurements. Here is a quick conversion:

  • 15 oz box = approx 4 cups cake mix
  • 15.25 oz box = approx 4 1/4 cups cake mix
  • 16 oz box = approx 4 1/3 cups cake mix
  • 18.5 oz box = approx 5 cups cake mix

These conversions assume an average of 1/4 cup of cake mix per ounce. But check your specific brand as the density and thus cups per ounce can vary.

Factors that Impact Number of Servings

How many actual cake servings you get from a box will depend on:

  • Cake size – Standard 9×13 cakes will yield more slices than round or loaf cakes
  • Thickness of slices – Thinner slices mean more servings
  • Any added ingredients – Mix-ins like chocolate chips, nuts, etc can decrease batter volume
  • Following directions – Accuracy in following the recipe matters
  • Overmixing – Overmixing can deflate batter leading to denser cake

While the cup yield per box is relatively standard, the actual number of cake slices can vary based on these factors. Checking the serving yield listed on the cake mix packaging is the best way to estimate slice totals.

Weight vs Volume for Accuracy

Dry ingredients are measured by weight, rather than volume in many baking recipes. This is because weighing dry ingredients like flour and cake mix provides more consistent accuracy compared to measuring by volume in cups or spoons.

Reasons weighing is more precise include:

  • Packing – The same volume can weigh differently based on how packed the cup or spoon is. Dense packing fits more in the same volume.
  • Settling – Powders can settle over time losing volume. 1 cup settled powder weighs more than 1 freshly scooped cup.
  • Sifting – Sifting powders increases volume and lifts them, giving more cups per ounce. Non-sifted is denser.
  • Moisture content – Varying moisture levels impacts density and weight even in dry ingredients.

For maximum accuracy in recipes, especially for baking, weight takes the guesswork out and provides consistent results.

Tips for Measuring Dry Cake Mix

When measuring dry cake mix by volume in cups, here are some tips for best results:

  • Use standard dry measuring cups, not liquid cups with pour spouts
  • Spoon mix lightly into cups, then level off top with a knife
  • Do not tap or compact mix into the cup
  • Follow recipe instructions if sifting is required first
  • Measure correctly using 1/4 cups if needed rather than rounding

Being careful in your measuring methods can help ensure you get the desired amount of cake mix for your recipe.

Weight Scale Recommendations

For greater precision, investing in a digital kitchen scale to weigh cake mix and other dry ingredients is recommended. Look for the following features when selecting a baking scale:

  • Digital display showing weight measurements in grams or ounces
  • Capacity of at least 5 pounds to handle bulk dry ingredients
  • Precision of 0.1 oz or 1 gram
  • Easy to tare/zero function to reset scale between ingredients
  • Flat weighing platform large enough for mixing bowls

Quality brands like OXO, Escali, and Greater Goods offer affordable kitchen scales with the features needed for most baking recipes.


Most standard 15.25 oz boxes of dry cake mix contain between 4 to 5 cups of mix. However, the exact cups per box varies slightly based on brand, variety, sifting, and packing. For best accuracy check the packaging, which lists total cups and serving yields. Weighing dry mix provides more precision than volume measuring in cups. But when measuring cake mix by volume, be sure to lightly spoon it into dry cups without compacting.

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