Cups to mL Converter

Convert between cups and mL using this calculator tool. Choose from the three different cup sizes: US cup, imperial cup, metric cup.


Disclaimer: Whilst every effort has been made in building this calculator, we are not to be held liable for any damages or monetary losses arising out of or in connection with the use of it. This tool is here purely as a service to you, please use it at your own risk. Full disclaimer. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate calculations.


How many ml in a cup?

To work out how many ml there are in a cup, you need to know which cup your recipe/instructions is referencing. The US cup measures 236.59 mL. In comparison, the old imperial UK cup (most commonly referenced in pre-1970s recipes) measures 284.13 mL. The metric cup, referenced in Commonwealth countries and modern UK recipes, measures 250 mL. Here's a chart of how they measure for 1 cup, 1/2 cup, 1/3 cup and 1/4 cup.

Conversion of measuring cups to ml

1 Cup 1/2 Cup 1/3 Cup 1/4 Cup
US Cup 236.59 mL 118.29 mL 78.86 mL 59.15 mL
UK Imperial Cup 284.13 mL 142.07 mL 94.71 mL 71.03 mL
Metric Cup 250 mL 125 mL 83.3 mL 62.5 mL

You can learn more about the different cups sizes in my article, tablespoon and cup sizes around the world. There's also a great article from the UK Telegraph about how cup measures can cause unnecessary havoc in your kitchen.

Measuring a liquid in ml

Other Cooking Units

Should you wish to convert between cups and other units, converters are also available for cups and grams, cups and ounces and quarts and cups.


If you have any suggestions for this converter, please contact me.