Cups to ml Converter

How to use the cups to milliliters converter

1. Enter a number in the Cups field to convert to milliliters, or enter a number in the Milliliters field to convert to cups.
2. The result updates automatically as you type.
3. Use the output for your recipe, scaling ingredients up or down as needed.

How the conversion works

The US legal cup is defined by federal regulation as exactly 236.5882365 milliliters. To convert cups to ml, multiply the number of cups by this factor. For example, 2.5 cups equals 2.5 x 236.5882365 = 591.471 ml. To convert milliliters to cups, divide the milliliter value by 236.5882365. So 500 ml is 500 / 236.5882365 = 2.11338 cups.

This cups to ml converter uses the legal cup rather than the US customary cup (236.5882365 ml vs 236.5882365 ml are identical for the legal definition, but the customary cup based on the gallon is 236.5882365 ml as well; historically they diverge slightly at higher precision). The legal cup is the standard used on US nutrition labels and in most modern American cookbooks.

Common cup to ml reference table

Here are frequently used fractions of a cup converted to milliliters, rounded to one decimal place for practical kitchen use.

Different types of cups

Not all cups hold the same volume. If you are following a recipe from outside the United States, the cup size may differ:

• US legal cup: 236.5882365 ml. Used for nutrition facts and most US recipes.
• US customary cup: 236.5882365 ml. Derived from the US liquid gallon (3785.411784 ml / 16). In practice, it rounds to the same value as the legal cup for cooking.
• Metric cup: Exactly 250 ml. Used in Australia, New Zealand, Canada, and the UK in some contexts.
• Imperial cup: 284.131 ml. Found in older British recipes. The UK largely switched to metric measurements decades ago.
• Japanese cup: 200 ml. Standard in Japanese cooking.

Always check which cup standard your recipe assumes before converting cups to milliliters.

Relating cups to other kitchen units

In American cooking, cups sit within a hierarchy of volume measures. One cup equals 16 tablespoons or 48 teaspoons. If you need smaller conversions, you can use a tbsp to ml converter (1 tablespoon is about 14.787 ml) or a tsp to ml converter (1 teaspoon is about 4.929 ml).

For larger volumes, four cups make one quart. A quarts to cups tool helps when scaling recipes up. Understanding these relationships prevents mistakes when substituting measuring tools. If a recipe calls for half a cup and you only have a tablespoon measure, you will need exactly 8 tablespoons.

Why milliliters are preferred in baking

Professional bakers and food scientists prefer milliliters over cups because volume measurements of dry ingredients vary with packing density. A cup of flour can weigh anywhere from 120 to 150 grams depending on whether it was scooped, spooned, or sifted. Liquids are more consistent, but measuring them in milliliters removes ambiguity entirely.

A graduated cylinder or a digital scale set to grams (using the density of water, 1 ml = 1 g) gives repeatable results. Converting cups to ml is the first step toward more precise baking, especially for recipes like macarons, bread, or custards where small deviations change the texture.

Worked examples

Each result below was produced by the same code the tool runs, so you can check your own numbers against them.