US Cup vs. UK Metric Cup to Milliliters (ml) Comparison Chart

This chart highlights the difference between a US customary cup and a UK metric cup (also used in Australia, New Zealand, Canada, etc.), with volumes shown in milliliters (ml).

Cup Type	Milliliters (ml) (approx.)	Common Usage
1 US Customary Cup	236.59 ml	Standard in US recipes. Equal to 8 US fluid ounces.
1 UK Metric Cup (also AU, NZ, CA)	250 ml	Standard in UK, Australian, New Zealand, Canadian, and many other international metric recipes.
Difference (UK Metric - US)	13.41 ml	A UK Metric Cup is slightly larger.

1/2 US Customary Cup	118.29 ml
1/2 UK Metric Cup	125 ml

1/4 US Customary Cup	59.15 ml
1/4 UK Metric Cup	62.5 ml

2 US Customary Cups (1 US Pint)	473.18 ml
2 UK Metric Cups (500ml)	500 ml	Often referred to as 0.5 Liter.

Important Distinctions:

A **US customary cup** is approximately 237 ml.
A **UK metric cup** (also used in Australia, New Zealand, Canada, and South Africa) is standardized at 250 ml.
While the difference per cup might seem small (around 13-14 ml), it can add up in recipes calling for multiple cups of an ingredient.
Always check the origin of your recipe. If it's a UK, Australian, or New Zealand recipe, it likely uses the 250ml metric cup.
Japan uses a different traditional cup measurement of 200 ml.
For accurate kitchen conversions, visit kitchencalculator.app.