Is a cup of coffee 5 or 6 oz?

Quick Answer

There is no definitive standard for the size of a cup of coffee. However, a typical cup of coffee is generally between 5-8 ounces, with many coffee shops and restaurants considering a standard cup to be 6 ounces. The actual size can vary depending on factors like the type of coffee, serving container, and personal preferences.

What is Considered a Cup of Coffee?

When we talk about a “cup” of coffee, we are generally referring to a unit of measurement rather than an actual cup or mug. A cup is an imprecise measurement that can vary slightly depending on the context.

Some common definitions for a cup of coffee include:

  • 5 ounces (148 ml)
  • 6 ounces (177 ml) – This is a common standard cup size used by many coffee shops and restaurants.
  • 8 ounces (237 ml) – Some larger coffee mugs hold up to 8 ounces.
  • 236.5882 milliliters – In the United States, a legal cup is defined as half a U.S. pint, or 236.5882 ml.

So while there is no universal standard cup size, 6 ounces is a good benchmark for an average cup of coffee. But it’s not unusual for a cup to contain anywhere from 5-8 ounces depending on factors like the brewing method, serving container, and personal preferences.

Typical Cup Sizes

Here is some more detail on common cup sizes for brewed coffee:

5 ounces

A 5 ounce cup is on the smaller side for a typical cup of coffee. This serving size would be appropriate for small coffee mugs or a short cup used for espresso-based drinks like lattes and cappuccinos. The small size highlights the intensity of espresso flavors.

6 ounces

A 6 ounce cup is considered the standard cup size at many coffee shops, restaurants and convenience stores. It allows for a balanced cup with full coffee flavor and an appropriate amount of caffeine. Six ounces is a typical cup size for coffee makers as well.

8 ounces

An 8 ounce cup represents a large or “grande” sized coffee. It’s a common cup size available at coffee chains like Starbucks. The extra 2 ounces of an 8 ounce cup allows for light cream and sugar without sacrificing coffee flavor. It’s a better option for people who prefer their coffee on the lighter side.

10-12 ounces

Some extra large coffee mugs hold up to 10 or 12 ounces. While not a standard cup size, some coffee drinkers prefer these extra large mugs for a more indulgent coffee experience or to allow pouring in lots of cream and sugar. The large volume can result in a diluted coffee flavor.

Factors Affecting Cup Size

There are a few key factors that impact coffee cup sizes and volume:

Brewing method – The brewing equipment and method affects cup sizes. For example, a standard cup from a drip coffee maker is usually around 5-6 ounces. Espresso shots used for lattes are generally 1-2 ounces. And a pour over cone may produce just 4 ounces per brew.

Serving container – Cup sizes are limited by the capacity of the mug or cup used for drinking. A standard ceramic coffee mug may be 6-8 ounces. Small espresso cups just 2-3 ounces. And large travel mugs can reach 16-20 ounces.

Coffee type – Coffee beverage type influences expected sizes too. A cup of black drip coffee may be 8-12 ounces. While a cappuccino is usually a 5-6 ounce cup with foamed milk. And a double espresso shot is just 2 ounces.

Personal habits – Some people have a preference for smaller or larger cup sizes based on factors like caffeine tolerance. Light coffee drinkers may favor a 4-6 ounce cup, while heavier drinkers might prefer 10-12 ounces.

Serving customs – Cultural traditions and coffee shop norms affect sizing too. Places known for strong, rich espresso drinks may tend towards smaller cups. While some diners and restaurants in America are used to large mug sizes.

So cup size expectations can cover a wide range based on many variables. But the average coffee cup containing pure brewed coffee is likely to be between the 5-8 ounce range.

Cup Sizes at Popular Coffee Chains

To provide more guidance, here is an overview of standard cup sizes available at three popular coffee chains in America:

Starbucks Coffee Sizes

Size Ounces
Short 8
Tall 12
Grande 16
Venti 20

Starbucks offers four main cup sizes for brewed coffee. The “Short” 8 ounce cup is their smallest option. The “Tall” 12 ounce cup was their original small size. “Grande” at 16 ounces is considered a medium or regular. And “Venti” is the extra large 20 ounce cup.

Dunkin Donuts Coffee Sizes

Size Ounces
Small 10
Medium 14
Large 18
Extra Large 24

Dunkin Donuts offers slightly different sizing standards. Their small cup is 10 ounces. Medium is 14 ounces. Large is 18 ounces. And extra large is a full 24 ounces. Their small and medium sizes are a bit larger than Starbucks.

McDonald’s Coffee Sizes

Size Ounces
Small 12
Medium 16
Large 21-24

McDonald’s also offers three sizes. Their small is 12 ounces. Medium is 16 ounces. And large can range from 21-24 ounces. The McDonald’s small and medium are comparable to Starbucks’ Tall and Grande sizes.

Tips for Ordering Your Preferred Cup Size

Since cup sizes can vary between coffee shops, here are some tips to order your perfect amount of coffee every time:

  • Know the standard sizes available, like “small” or “large.” Sizes like “tall” and “grande” are unique to some chains.
  • Check ounces if the volume matters to you. Especially when ordering larger sizes that can range more.
  • Specify volume if needed, like “medium 12 ounce coffee.”
  • Read menus closely to compare size options and naming conventions.
  • Don’t assume traditional “small” means 8 ounces or less. It’s often 10-12 ounces.
  • Ask about volumes if you need a specific amount, like 5 ounces.
  • Order a “short” size when available if you want less volume.
  • Choose the smallest size for stronger espresso flavors.
  • Select larger sizes if you prefer lots of cream and sugar.

With the wide variability in cup sizes these days, it’s smart to clarify size and volume when ordering coffee if the amount of coffee matters to your drinking pleasure!


While there is no universal standard cup size for coffee, most cups contain between 5-8 ounces. A typical “regular” size cup from a coffee shop or restaurant is usually about 6 ounces. But cup size can vary based on factors like brewing method, serving container, coffee type, personal preferences, and regional norms. To get your ideal amount of coffee, pay attention to the menu sizing terminology. And never hesitate to confirm volumes or request your perfect cup size. With so many options today, you can enjoy coffee just the way you like it!

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