Cups to ml: Conversion Chart & Calculator
Cups to ml is a volume-to-volume conversion, so it does not depend on the ingredient. 1 US customary cup = 236.59 ml, 1 US legal cup = 240 ml, 1 metric cup = 250 ml, and 1 imperial cup = 284.13 ml. Use the calculator below for any cup amount and cup standard.
1 US cup = 236.59 ml, 1/2 US cup = 118.29 ml, 1/4 US cup = 59.15 ml, and 2 US cups = 473.18 ml. For a metric cup, 1 cup = 250 ml.
Cups to ml Calculator
Choose your cup standard and enter the number of cups. The calculator starts at 1 cup, but you can enter any amount, including decimals such as 1.5 or 2.25 cups.
Using US Customary Cup — 236.588 ml
Cups to ml Conversion Chart
The following chart shows cups in milliliters for all four cup standards.
| Cups | US Customary | US Legal | Metric | Imperial |
|---|---|---|---|---|
| 1/4 cup | 59.15 ml | 60 ml | 62.5 ml | 71.03 ml |
| 1/3 cup | 78.86 ml | 80 ml | 83.33 ml | 94.71 ml |
| 1/2 cup | 118.29 ml | 120 ml | 125 ml | 142.07 ml |
| 2/3 cup | 157.73 ml | 160 ml | 166.67 ml | 189.42 ml |
| 3/4 cup | 177.44 ml | 180 ml | 187.5 ml | 213.10 ml |
| 1 cup | 236.59 ml | 240 ml | 250 ml | 284.13 ml |
| 2 cups | 473.18 ml | 480 ml | 500 ml | 568.26 ml |
| 3 cups | 709.76 ml | 720 ml | 750 ml | 852.39 ml |
| 4 cups | 946.35 ml | 960 ml | 1000 ml | 1136.52 ml |
How to Convert Cups to ml
To convert cups to ml, multiply the number of cups by the milliliters in one cup for the cup standard you are using.
Milliliters = cups × ml per cup
Milliliters = cups × 236.588 (for a US customary cup)
For example, to convert 2 US customary cups:
2 × 236.588 = 473.176 ml ≈ 473.18 ml
Therefore, 2 US customary cups equal approximately 473.18 ml.
How Many ml Is 1 Cup?
It depends on the cup standard, not on the ingredient, because both cups and milliliters measure volume.
US Customary Cup
236.59 ml — commonly used in US recipe conversions.
Metric Cup
250 ml — used in metric recipe systems.
How Many ml Is 1/2 Cup?
Half a US customary cup is 118.29 ml, half a US legal cup is 120 ml, half a metric cup is 125 ml, and half an imperial cup is approximately 142.07 ml.
How Many ml Is 2 Cups?
Two US customary cups are 473.18 ml, two US legal cups are 480 ml, two metric cups are 500 ml, and two imperial cups are approximately 568.26 ml.
For weight-based conversions, see our 120 grams to cups and grams to ml guides.
US Cups vs Metric Cups
A US customary cup contains approximately 236.59 ml, while a metric cup contains 250 ml. The calculator above lets you switch between US customary, US legal, metric, and imperial cup standards.
Why Cups Have Different ml Values
Different recipe systems define a cup differently. The volume of a cup is fixed by the standard being used, so always confirm whether your recipe means a US customary, US legal, metric, or imperial cup.
Trusted Measurement References
- NIST Kitchen Measurement Equivalencies
- King Arthur Baking Ingredient Weight Chart
- USDA FoodData Central
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Frequently Asked Questions
How many ml is 1 cup?
1 US customary cup = 236.59 ml, 1 US legal cup = 240 ml, 1 metric cup = 250 ml, and 1 imperial cup = 284.13 ml.
How many ml is 1/2 cup?
Half a US customary cup is 118.29 ml, while half a metric cup is 125 ml.
How many ml is 2 cups?
Two US customary cups are approximately 473.18 ml, while two metric cups are 500 ml.
Is 1 cup equal to 250 ml?
Only when you are using a metric cup. A US customary cup is approximately 236.59 ml, so 1 US customary cup is not the same as 250 ml.
Does cups to ml depend on the ingredient?
No. Cups and milliliters both measure volume, so the conversion is determined by the cup standard rather than the ingredient. Weight conversions such as grams to cups do depend on the ingredient.
How do I convert cups to milliliters?
Multiply the number of cups by the milliliters in one cup. For a US customary cup, use cups × 236.588. For a metric cup, use cups × 250.
Final Answer: Cups to ml
1 US customary cup = 236.59 ml, 1 US legal cup = 240 ml, 1 metric cup = 250 ml, and 1 imperial cup = 284.13 ml. The basic formula is milliliters = cups × ml per cup. Use the calculator above to convert any cup amount using the appropriate cup standard.
Theodore Whitmore writes clear, practical guides about grams, cups, ingredient weights, and everyday kitchen conversions for home cooks and bakers.
