Cup to mL Converter

A cup to milliliter converter translates one of the most common cooking volume measurements between the cup system used primarily in the United States and the milliliter, the standard metric unit for small liquid volumes. This conversion is essential for anyone following recipes from different countries, as cup sizes vary significantly between measurement systems used around the world.

The cup as a unit of measurement is not universal. The US legal cup, defined by federal regulation as exactly 236.588 milliliters, differs from the metric cup (250 mL), the Imperial cup (284.131 mL), and the Japanese cup (200 mL). These variations mean that a recipe calling for "2 cups of milk" produces different results depending on which cup standard is assumed. A US cup yields 473 mL, while a metric cup yields 500 mL — a difference of over 5 percent that can noticeably affect baking outcomes and beverage recipes.

This converter supports all four major cup standards and provides instant conversion not just to milliliters but also to liters, fluid ounces, and tablespoons. Whether you are adapting a Japanese matcha recipe to US measurements, converting an Australian baking guide for an American kitchen, or scaling a cocktail recipe between systems, this tool provides the accurate conversions you need.

The conversion multiplies the number of cups by the milliliter equivalent of the selected cup type. The formula is straightforward since each cup standard has a fixed milliliter value.

Different countries and culinary traditions use different cup sizes, which can cause significant errors in recipe conversion if the wrong standard is assumed.

• US Cup (236.588 mL): The standard used in American recipes and nutrition labeling. Derived from the US gallon of 231 cubic inches, divided into 16 cups. The most commonly encountered cup in international recipe databases.
• Metric Cup (250 mL): Used in Australia, New Zealand, Canada, and many other countries. Exactly one-quarter of a liter, making it compatible with the metric system's decimal structure. Commonly referenced in recipes from these regions.
• Imperial Cup (284.131 mL): The traditional British cup, based on the Imperial gallon of 4.54609 liters. Used in older British recipes and cookbooks, though the UK has largely adopted the metric cup for modern cooking.
• Japanese Cup (200 mL): Also known as the "gō" (合), this traditional Japanese measurement equals exactly 200 milliliters. Standard in Japanese cookbooks and rice cooker measurements. Significantly smaller than the US cup.

The calculator provides comprehensive volume conversions for cooking:

1. Enter the number of cups: Type the numerical value into the "Cups" input field. You can use decimals or fractions by entering the decimal equivalent.
2. Select the cup type: Choose from US, Metric, Imperial, or Japanese cup using the dropdown menu. The selected type determines the conversion factor.
3. Read the milliliter result: The converted volume in milliliters appears prominently in the result display.
4. Check all conversions: Below the main result, you can see the equivalent volume in milliliters, liters, fluid ounces, and tablespoons simultaneously.
5. Compare cup types: The cup type comparison panel shows the milliliter value for each cup standard, helping you understand the differences between systems.

International recipe sharing is the most common application for cup to milliliter conversion. As food bloggers and home cooks share recipes across borders, the ambiguity of "1 cup" creates confusion and inconsistent results. A French macaron recipe using metric cups produces different results than an American recipe using US cups. Converting to milliliters eliminates this ambiguity entirely, which is why many professional recipes specify weights in grams rather than volume in cups.

Nutrition labeling and dietary tracking require precise cup to milliliter conversions. The US FDA uses the US legal cup (236.588 mL) for nutrition facts labels, while international food products may use metric cups. Dietitians and nutritionists must convert between systems when analyzing food diaries or creating meal plans for clients who use recipes from different countries. A difference of even 15 milliliters per cup can compound to significant caloric discrepancies over a full day of meals.

Beverage preparation, particularly in the specialty coffee and cocktail industries, relies on precise volume measurements. Baristas converting coffee recipes between US and metric systems need accurate cup-to-milliliter translations. Cocktail recipes originating from different countries use different cup standards, and precise conversion ensures consistent drink quality. The Japanese tea ceremony also uses the traditional 200 mL cup (gō), requiring specific conversion knowledge for international practitioners.