In the world of measurement units, knowing how many ounces are in a cup is crucial and necessary. In the article below, we will explain how many ounces are in one cup and provide you with the most accurate unit conversion chart.

1. What is an ounce?
The concept of an ounce might still be unfamiliar to many in Vietnam. The measurement unit 'Ounce,' known as Aoxơ in Vietnamese, is widely used in Europe and America. It is commonly used, just like other units such as liter, milliliter, gram, and kilogram. The ounce is used to measure volume, mass, weight, and force. It is often abbreviated as 'oz' and may also be referred to as once, ons, or unze depending on the country using the unit.

2. Why is it necessary to convert cups to ounces?
Knowing how many ounces are in a cup is a highly discussed topic. This unit of measurement is essential in industries related to brewing and baking. The conversion of this unit is considered very important for several reasons, which are as follows:
- Ensures accuracy in measurement: In many recipes or drink preparation formulas, especially in baking, accurately measuring ingredients is crucial. The ounce is the most precise measurement unit used to ensure that ingredient proportions are correct, which leads to the desired final result.
- Convenient for recipe research: When searching for or sharing recipes, ingredients are usually listed using standardized units like ounces. Knowing how many ounces are in a cup helps maintain consistency and makes it easier to apply the formulas correctly.
- Flexibility with measuring tools: In some cases, specific measuring tools like spoons or cups may not be available, but a measuring cup could be. Understanding how to accurately convert between units allows for maximum flexibility with the tools at hand, making it easier to measure ingredients smoothly.
3. How many ounces are in a cup?
According to current international standards, one cup is equivalent to 8 fluid ounces. This 8 ounces corresponds to 240ml. Therefore, we can easily deduce that one ounce equals approximately 30ml, or more precisely, 29.57ml.
However, since cups are now produced in various sizes, it's important to pay attention to the conversion method in order to understand how many ounces are in a cup and apply the most accurate conversion formula. During the conversion process, it should be noted that the results will only be approximate and not entirely precise. Nonetheless, this slight discrepancy won’t significantly affect the final product in recipes or preparations.

Based on the formula above, we can further convert between cups and ounces as follows:
Đơn vị cốc (cup) |
Đơn vị Aoxơ (ounce) |
1 cốc |
8 Aoxơ |
3/4 cốc |
6 Aoxơ |
1/2 cốc |
4 Aoxơ |
2/3 cốc |
5 Aoxơ |
1/4 cốc |
2 Aoxơ |
1/8 cốc |
1 Aoxơ |
4. Converting ounces to volume measurement units

In addition to converting ounces to cups, there are numerous other volume measurement units that are relevant when it comes to mixing beverages. Notably, the milliliter (ml) and liter are also commonly used units. Therefore, if you aim to become a professional barista or chef, it is essential to master the conversion between these units and ounces.
- 1 Ounce = 29.57 ml
- 1 Ounce = 0.029 liters
This is the most widely used measurement unit for ounces in the United States. However, the international standard might differ slightly, with occasional discrepancies in the conversion process.
Aoxơ (ounce) |
Hệ đo lường quốc tế (ml) |
Hệ đo lường Mỹ (ml) |
1 |
28,35 |
29,57 |
2.5 |
71 |
74 |
3 |
85 |
89 |
3.5 |
99 |
103 |
4 |
113 |
118 |
4.5 |
128 |
133 |
5 |
142 |
148 |
6 |
170 |
177 |
6.5 |
192 |
185 |
7 |
198 |
207 |
7.5 |
213 |
222 |
8 |
227 |
237 |
8.5 |
241 |
251 |
9 |
255 |
266 |
10 |
284 |
296 |
15 |
425 |
444 |
20 |
567 |
591 |
25 |
709 |
739 |
5. Conversion of Ounce to Mass Measurement Units
In addition to the usual conversion methods, many people today are also curious about how to convert ounces to grams or kilograms. As mentioned, this unit is not only used to measure volume but is also commonly used to measure mass. Therefore, for those learning professional bartending, it is essential to fully understand how to convert these units accurately. Specifically, 1 ounce is equivalent to 28.35 grams (rounded).
You can refer to the conversion table below for easy application throughout the mixing process:
Aoxơ (ounce) |
Gram |
Kilogram |
0,1 |
2,835 |
0,002835 |
1 |
28,35 |
0,02835 |
2 |
56,7 |
0,057 |
3 |
85,05 |
0,085 |
4 |
113.4 |
0.113 |
5 |
141,75 |
0,142 |
6 |
170,1 |
0,17 |
7 |
198,45 |
0,198 |
8 |
226,8 |
0,227 |
9 |
255,15 |
0,255 |
10 |
283.5 |
0.284 |
50 |
1417,48 |
1,417 |
60 |
1700,97 |
1,701 |
100 |
2834,95 |
2,835 |
1000 |
28349,52 |
28,35 |
6. Conversion of Ounce to Common Ingredients

Flour, sugar, oats, chocolate, and similar ingredients are frequently used in cooking and beverage preparation. Many international recipes for food and drinks involve ingredients measured in ounces. Therefore, understanding how many ounces are in a cup for these common ingredients is essential. The current conversion table is as follows:
Cốc |
Aoxơ |
1 Bột mì |
4 ¼ |
1 Đường |
7,1 |
1 Yến mạch |
3,6 |
1 Socola chip |
6 |
In the article above, we have answered the question: How many ounces are in a cup? The standard unit conversion table. Wishing you a great day ahead!