What is the difference between an Australian and US cup?

An Australian (metric) cup is 250ml, while a US cup is 240ml. The difference is about 4%, which is small for most recipes but can matter when baking at scale. For a single cup of flour, the difference is about 5 grams.

Is there a standard UK cup?

No, there is no official UK cup measurement. The UK uses metric weights (grams) as the standard. When UK recipes refer to cups, they typically mean the US cup (240ml) or sometimes the metric cup (250ml). Always check which standard a recipe uses.

What about Australian tablespoons?

Australian tablespoons are 20ml, not 15ml like UK and US tablespoons. This is a 33% difference and very important when following Australian recipes. Australian teaspoons are the standard 5ml, the same as everywhere else.

Does the 10ml difference really matter?

For wet ingredients like water or milk, 10ml per cup is unlikely to matter. But for dry ingredients at scale — say, 5 cups of flour — the difference is 50ml, which could be 25g of flour. For precision baking, it is worth adjusting.

Why is the Australian cup different from the US cup?

The Australian cup is 250ml (a metric cup), while the US cup is 236.6ml (based on an older imperial standard). The difference is about 5%, which can matter in baking. Australian tablespoons are also different — 20ml versus 15ml in the UK and US.

BakeCalcs

Australian to UK Cups Converter

Convert between Australian, US, and metric cup measurements for baking and cooking.

Conversion Direction

Amount

How We Calculate This

The converter translates between Australian metric cups (250ml) and US cups (240ml), converting through millilitres as the common base unit.

Cup Standards

Australian cup: 250ml (also called metric cup)
US cup: 240ml (236.6ml precisely)
UK cup: No official standard (use grams instead)
Japanese cup: 200ml

Tablespoon Differences

Australian tablespoon: 20ml (4 teaspoons)
UK/US tablespoon: 15ml (3 teaspoons)
All teaspoons: 5ml (universal standard)

Frequently Asked Questions

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Last updated: February 2026

All calculations are based on standard ratios and conversions. Results may vary with specific ingredients, equipment, and conditions.