Cups to Millilitres Converter

Understanding Cups to Millilitres

One US cup equals exactly 236.588 millilitres (commonly rounded to 237ml or 240ml for convenience). This is a fixed conversion because both are volume measurements — unlike weight conversions, it doesn't depend on the ingredient. However, it's crucial to note that UK cups and metric cups are 250ml, about 6% larger than US cups. Australian cups are also 250ml. Learn more about the differences between US and UK cups.

When to Use Cups to Millilitres

Need precise liquid measurements? Converting cups to millilitres is essential when working with recipes from different countries. Many countries use millilitres as their standard volume measurement, while American recipes typically use cups. This conversion is most useful for liquids like water, milk, or oil, but also applies to dry ingredients when measuring by volume.

Practical Tips

This conversion is helpful when you have measuring cups marked in cups but need to know the millilitre equivalent, or when following international recipes that use millilitres. Most liquid measuring cups show both cups and millilitres, making conversion easy. For precision, use a measuring jug with millilitre markings rather than converting mentally.

Quick Tips

• 1 US cup = 236.588ml (approximately 237ml for practical purposes)
• UK and metric cups are 250ml, which is different from US cups
• This conversion works perfectly for liquids since both measure volume
• For dry ingredients, cups to grams is more useful due to density variations

Common Mistakes to Avoid

The biggest mistake is assuming all cups are the same size. US cups (236.588ml), UK cups (250ml), and Japanese cups (200ml) are all different. Using the wrong cup size can throw off your recipe by 6-20%. Another error is rounding too aggressively — while 237ml or 240ml is fine for most cooking, precision baking may require the exact 236.588ml value.

When Precision Matters

For most cooking, rounding to 240ml per cup is perfectly acceptable. Precision matters when making cocktails, scientific recipes, or when scaling recipes significantly (small errors multiply). For baking, the cups-to-grams conversion is more important than cups-to-ml since weight is more accurate than volume for dry ingredients.