If you’ve recently purchased or are considering investing in a Keurig coffee maker, understanding K-cup sizes is essential to get the best possible tasting coffee. One of the benefits of K-cups is their uniform size, making purchasing simple, with no need to worry about whether you’re buying the right type or size. Any K-cups will work with any Keurig machine, allowing you to keep using the same K-cups even if you upgrade your machine.
K-cups measure approximately 1.5 inches in height and have a cup-like shape, with a wider diameter at the rim and a smaller diameter at the base. Each cup can hold about two tablespoons of coffee grounds. Knowing this information will help ensure you are using the correct amount of coffee grounds for your desired strength of coffee.
How to Alter the Strength of Your Coffee?
If you’re used to adjusting the amount of coffee product to make your coffee taste stronger or weaker, you might wonder how to do this with a Keurig machine since all K-cups are the same size and pre-measured. However, you can alter the strength of your coffee by adjusting the amount of water used.
For a stronger brew, use less water, resulting in a higher ratio of coffee grounds to water, and a stronger tasting coffee. Conversely, for a weaker coffee, use more water, resulting in a lower ratio of coffee grounds to water and a weaker tasting coffee.
Another way to adjust the strength of your coffee is to alter the length of time you brew the grounds. Some Keurig models come with a “strong” button that allows for longer soaking of the grounds to extract more flavor, resulting in a stronger coffee. This feature only adds a few seconds to the brewing time, making it a convenient option for those who enjoy a stronger cup of coffee.
If strong coffee is your preference, it’s worth considering the Keurig model you purchase to ensure it has a strong button feature. By adjusting the amount of water or using the strong button, you can make the perfect cup of coffee to suit your taste preferences.
Keurig Cup Sizes – Common Water Measurements for K-cups

To adjust the strength of your coffee, you can alter the amount of water used, which is automatically measured by the Keurig machine, taking the hassle out of brewing a perfect cup. The cup size available to choose from depends on the model of your Keurig machine, with sizes ranging from 2oz to 12oz.
Some models have buttons with the ounce measurements printed on them, while others feature images of small to large coffee cups to indicate sizing. The Keurig K-Cafe model offers a 2oz serving, which can be enjoyed as an espresso shot or topped up with frothed or steamed milk. The 4oz cup size is only available on the Keurig K-Elite, Keurig K-Supreme Plus, and Keurig K-Supreme Plus Smart models, resulting in a small but strong-tasting cup of coffee.
The 6oz cup size is more commonly available and is offered on several Keurig models, including the Keurig K-Express Essentials, Keurig K-Elite, Keurig K-Select, Keurig K-Classic, Keurig K-Supreme, Keurig K-Supreme Plus, Keurig K-Supreme Plus Smart, Keurig K-Cafe, Keurig K-Duo, and Keurig K-Duo Plus. The Keurig K-Mini and Keurig K-Mini Plus can also serve 6oz measurements, but the user must fill the machine to the minimum marker.
All Keurig models offer an 8oz cup size, which is an ideal serving size for home coffee mugs. The 10oz cup size is also available on all models, with the Keurig K-Mini and Keurig K-Mini Plus requiring user measurement. The biggest serving size available on a Keurig machine is 12oz, offered on the Keurig K-Slim, Keurig K-Express, Keurig K-Elite, Keurig K-Select, Keurig K-Supreme, Keurig K-Supreme Plus, Keurig K-Supreme Plus Smart, Keurig K-Cafe, Keurig K-Duo, and Keurig K-Duo Plus. The Keurig K-Mini and Keurig K-Mini Plus both have a total capacity of 12oz, requiring the reservoir to be filled to the maximum marker for a 12oz cup.