Have you ever followed a drink recipe from abroad that listed measurements in cups or ounces? Those measurements can be confusing if you are used to using milliliters.
For example, one recipe lists 1 cup of milk, while the glass at home has a capacity measured in milliliters. To avoid measurement errors, you first need to know the relationship between cups, ounces, and milliliters.
Let's get to know the conversions so it is easier for you to determine drink measurements and choose the right cup size.
So, how many ounces are in a cup?
1 cup = 8 fluid ounces (fl oz) when using the United States measurement system. The NIST (National Institute of Standards and Technology) states that one measuring cup is equal to exactly 8 fluid ounces or approximately 237 ml.
This conversion is commonly found in US food and drink recipes. So, when a recipe calls for one cup of water, milk, coffee, or other liquid, you can use around 237 ml as your reference.
Here is a practical conversion table that is easy to remember:
| Measurement | US Fluid Ounce | Approximate ml |
|---|---|---|
| 1/4 cup | 2 fl oz | 59 ml |
| 1/2 cup | 4 fl oz | 118 ml |
| 3/4 cup | 6 fl oz | 177 ml |
| 1 cup | 8 fl oz | 237 ml |
| 1 1/4 cup | 10 fl oz | 296 ml |
| 1 1/2 cup | 12 fl oz | 355 ml |
These numbers are useful when you find a recipe using ounce measurements, while your available mug or cup lists volume in cl or ml.
Do not confuse ounces and fluid ounces
The term ounce can be confusing because it is used to express mass, whereas fluid ounce is used to express liquid volume. Both have different abbreviations: oz for ounce and fl oz for fluid ounce.
Therefore, 8 fl oz of water means a volume of about 1 cup in the US measurement system. However, 8 oz of flour or sugar means a weight of 8 ounces, not a volume of 1 cup. The volume of those ingredients can differ because every ingredient has a different density.
This distinction is important to keep in mind when following recipes. If the measurement relates to liquids such as water, milk, coffee, or tea, use fluid ounces or ml to adjust to your cup's capacity.
Meanwhile, if a recipe lists ounces for solid ingredients, pay attention to whether that measurement refers to weight.
Is one cup always 8 ounces?
Not always. The word cup can have different values depending on the standard used. The US standard uses about 237 ml or 8 fl oz, while a metric cup generally uses 250 ml.
A difference of about 13 ml is relatively small when simply choosing an everyday mug size, but it can be more noticeable when following recipes that require several cups at once. For that reason, check the origin of the recipe and the units used before you start measuring.
For daily use, you also do not have to look for a mug with an exact volume of 237 ml. Mugs with a capacity of around 230–250 ml are already very close to the size of one US cup.
Read also: Tea drinking equipment to complete your home routine
IKEA mug and cup sizes based on ounces
After knowing the conversions, you can match container capacities to your drinking habits. The collection of IKEA mugs and cups is available in various capacities ranging from espresso servings to larger drinks. Here are some options:
1. IKEA 365+ espresso cup and saucer 6 cl
A capacity of 6 cl is equal to 60 ml or about 2 fl oz. This size is suitable for espresso or coffee in small portions. The IKEA 365+ cup and saucer uses feldspar porcelain and is safe for use in both the microwave and dishwasher.
2. VÄRDERA mug 17 cl
With a volume of 170 ml, the VÄRDERA cup 17 cl is equivalent to about 5.7 fl oz or roughly three-quarters of one US cup.
This capacity is a great choice if you usually enjoy coffee or tea in a more compact portion. This mug is made of feldspar porcelain and is microwave and dishwasher safe.
3. STELNA mug 23 cl
The STELNA cup 23 cl has a volume of 230 ml or about 7.8 fl oz. This means its capacity is very close to one US cup, which is about 237 ml. This clear glass mug is made of tempered glass and can be used for both hot and cold beverages.
4. IKEA 365+ mug 24 cl
A capacity of 240 ml is equivalent to about 8.1 fl oz, making it a choice very close to one standard US cup. The glass version of the IKEA 365+ cup 24 cl is made of tempered glass and can be used for hot and cold drinks.
5. VÄRDERA mug 30 cl
If you want extra room for milk coffee or tea, the VÄRDERA cup 30 cl or 300 ml is equivalent to about 10.1 fl oz. Its size is approximately 1.27 US cups, providing more room for added milk, foam, or ice depending on your drink type.
6. VÄRDERA cup 36 cl
A volume of 360 ml is equivalent to about 12.2 fl oz or roughly 1.5 US cups. This size is suitable for those who more frequently enjoy drinks in larger portions. IKEA Indonesia lists the option for the VÄRDERA teacup 36 cl with a saucer of the same capacity.
How to choose a cup size for daily needs
There is no need to stick to just one size.
- Start with the type and volume of drink you usually consume.
- For espresso, a capacity of around 60 ml is sufficient.
- For a single serving of coffee or tea, use a container of about 230–250 ml.
- If you like coffee with added milk or drinks in larger portions, choose a 300–360 ml capacity for more flexibility.
- Also consider the material, handle shape, maintenance ease, and cabinet storage space.
You can also match your cups with IKEA dining room tableware so your dining table feels more coordinated. The signature simple Scandinavian design makes it easy to combine mugs and cups with plates, bowls, and serving equipment you already own.
Read also: Tricks to choose quality coffee cups suitable for every moment
FAQ about ounces and cups
In US standards, 1 cup equals 8 fluid ounces or about 237 ml.
If referring to 8 US fluid ounces, the volume is about 237 ml.
250 ml is equivalent to about 8.45 US fluid ounces.
Almost identical. One US cup is about 237 ml, so a 240 ml mug is only slightly larger.
A mug with a capacity of 300 ml is equivalent to about 10.1 US fluid ounces.
No. Fluid ounces measure liquid volume, whereas standard ounces are used to measure weight.
Find the right cup capacity for your routine
Understanding how many ounces are in a cup makes recipe conversion and beverage container selection much easier. Use the 8 fl oz or approximately 237 ml guideline for one US cup, then adjust to the coffee, tea, or other beverage portions you usually enjoy.
From 6 cl espresso sizes to 36 cl mugs for larger servings, IKEA provides options tailored to your routine. Explore the IKEA Indonesia mug and cup collection and find the right size to complete your drink time at home via IKEA.co.id.