Cups to Milliliters Converter

Cups to milliliters: the quick answer and the formula

To convert cups to milliliters, multiply the number of cups by 240. So 1 cup is about 240 mL, half a cup is 120 mL, and 2 cups is 480 mL. That 240 figure is the US legal cup used on nutrition labels, and it is the value most recipes assume. This cups to milliliters converter applies the right factor for you instantly in the browser, with no signup, so you can scale any recipe from imperial measuring cups to precise metric volumes in seconds.

One thing to know up front: "cup" is not a single universal size. The US customary cup is roughly 237 mL, the US legal cup is exactly 240 mL, and the metric cup used in much of the world is 250 mL. For everyday cooking the differences are small, but the table further down shows each one so you can match your recipe's origin.

How to use this cups to milliliters converter

It works the moment you start typing.

1. Enter the number of cups, including fractions or decimals like 0.5 or 1.25.
2. Read the milliliters result instantly, with the × 240 step already applied.
3. Copy the figure into your recipe, or adjust the input to scale a batch up or down.

If your recipe is already metric and you need the reverse, the milliliters to cups converter divides by 240 to take you back to cups.

Cups to milliliters formula and worked examples

The core formula uses the US legal cup:

mL = cups × 240

The reverse direction divides:

cups = mL ÷ 240

Working an example by hand: for three-quarters of a cup, 0.75 × 240 = 180 mL. For a cup and a half, 1.5 × 240 = 360 mL. The reference table below lists the common kitchen amounts plus how each cup standard compares, so you can pick the one that matches your recipe.

Common conversions and use cases

Converting cups to milliliters is mainly a kitchen task, and a few situations come up again and again.

• Following an international recipe. Many recipes outside the US list liquids in milliliters, so converting your cup measure keeps proportions correct.
• Baking precision. Baking is chemistry, and milliliters are more exact than rough cup scoops, especially for liquids like milk, water, and oil.
• Scaling a batch. Doubling or halving is cleaner in milliliters because you avoid awkward fractions of a cup.
• Nutrition and hydration tracking. Serving sizes on labels are usually metric, so converting cups helps you log intake accurately.

Keep in mind these factors are for liquid volume. A cup of flour and a cup of water occupy the same volume but weigh very different amounts, so use volume conversions for liquids and a kitchen scale for dry ingredients when accuracy matters.

It also helps to know how cups relate to the smaller spoon measures you see in recipes, since many ingredients are given in tablespoons and teaspoons. The table below breaks a US cup down into those units alongside its milliliter value, which is handy when a recipe lists, say, three tablespoons of oil and you want it in milliliters.

These spoon equivalents are rounded to the values used in most kitchens. A teaspoon is treated as 5 mL and a tablespoon as 15 mL, which makes it easy to build up any awkward fraction of a cup from spoons when you do not have the exact measuring cup to hand.

Measuring liquids accurately

Converting to milliliters only pays off if your original measurement was accurate, so a few kitchen habits matter. For liquids, use a clear measuring jug and read it at eye level; looking down at the meniscus from above makes the level look higher than it is and leads to over-pouring. Set the jug on a flat surface rather than holding it in the air, where a slight tilt skews the reading.

When a recipe gives liquids in milliliters and you only have cup measures, converting first and then measuring is more reliable than estimating. For very small amounts, switch to spoons: measuring 15 mL as a level tablespoon is far more accurate than trying to pour a thin film into the bottom of a cup. The goal is to keep the proportions a recipe author intended, and milliliters make that easier because they leave no room for the ambiguity that "a cup" carries.

For thicker liquids like honey, syrup, or oil, the same volume conversion applies, but they cling to the measuring vessel. Lightly coating the cup or jug helps the liquid release cleanly so you actually transfer the full measured amount into the bowl.

There is a reason professional bakers tend to work in grams and milliliters rather than cups. Volume measures depend on how an ingredient settles, how firmly it is packed, and even the shape of the cup, while a milliliter is always a milliliter. Converting a recipe from cups to milliliters once, then writing the metric figures back onto the recipe card, gives you a version you can reproduce exactly every time. That repeatability is the whole point: the same input should give the same loaf, sauce, or batter on the tenth attempt as on the first.

Common mistakes to avoid

Most cup-to-milliliter slip-ups come from the unit's ambiguity.

• Assuming every cup is 240 mL. If your recipe is Australian or European, it may use a 250 mL metric cup. Match the standard to the recipe's source.
• Confusing volume with weight. Milliliters measure volume, not grams. Do not convert a cup of sugar straight to grams using a liquid factor.
• Using a coffee mug as a cup. Mugs hold far more than a measuring cup, often 300 to 400 mL, so always use a proper measuring cup.
• Mixing up cups and fluid ounces. One US cup is 8 fluid ounces, so converting fluid ounces needs a different factor.
• Rounding too aggressively. For most cooking, rounding to whole milliliters is fine, but for medicine or precise baking keep a decimal place.

Tips and related converters

A simple rule of thumb: 1 cup is roughly a quarter of a liter, so four cups is close to one liter. That estimate is accurate enough for planning a recipe before you measure. When you are working in fluid ounces, use the fluid ounces to milliliters converter (multiply by about 29.57) or the milliliters to fluid ounces converter to go the other way. For non-kitchen units, the power converter handles watts and horsepower. You can find every volume and measurement tool on the unit converters hub, and switch back with the milliliters to cups converter any time.

Frequently asked questions

How many milliliters are in a cup? One US legal cup is 240 milliliters, the value used on nutrition labels. The US customary cup is about 237 mL and the metric cup is 250 mL.

How do I convert cups to milliliters? Multiply the number of cups by 240. For example, 2 cups × 240 = 480 mL. Use 250 instead of 240 if your recipe uses the metric cup.

How many mL is half a cup? Half a US cup is 120 milliliters (0.5 × 240). In the metric standard it would be 125 mL.

Why are there different cup sizes? The US legal cup is 240 mL, the US customary cup is about 237 mL, and the metric cup is 250 mL. They evolved separately, so always match the cup to the recipe's country of origin.

How do I convert milliliters back to cups? Divide the milliliters by 240. For example, 360 mL ÷ 240 = 1.5 cups. Our milliliters to cups converter does this for you instantly.

Can I use this for dry ingredients? The volume in milliliters is the same, but the weight differs by ingredient. For dry ingredients where accuracy matters, weigh them on a scale rather than relying on volume alone.

How many cups are in a liter? Using the 240 mL cup, one liter (1,000 mL) is about 4.17 cups. With the 250 mL metric cup it is exactly 4 cups.

Is a coffee mug the same as a measuring cup? No. A typical mug holds 300 to 400 mL, well over a 240 mL measuring cup, so never substitute a mug when a recipe calls for a cup.

How many cups is 250 mL? 250 mL is about 1.04 US cups, or exactly 1 metric cup. For most recipes you can treat 250 mL as a single cup.