How do I convert Australian cups to UK cups?

The modern UK metric cup is 250ml — exactly the same as the Australian cup — so for volume the conversion is 1:1 (2 Australian cups = 2 UK metric cups). Only the old UK imperial cup is different at 284.13ml (10 fl oz, half an imperial pint); against that, 1 Australian cup is about 0.88 imperial cups. Select your UK cup standard above to see the matching figure.

What is the difference between an Australian and US cup?

An Australian (metric) cup is 250ml, while a US cup is 240ml (the US legal cup used on nutrition labels). 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 roughly 5 grams.

Is there a standard UK cup?

Modern UK recipes mostly use kitchen scales and grams, but when a cup is quoted it almost always means the 250ml metric cup (the same as Australia and New Zealand). The old UK imperial cup of 284.13ml (half an imperial pint) is now rarely seen. There is no UK cup of 240ml — that is the US cup. 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 — for example, an Australian recipe asking for 2 tablespoons (40ml) needs nearly 3 UK tablespoons. Teaspoons are the standard 5ml everywhere, including Australia.

Does the 10ml difference between Australian and US cups 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 around 25g of flour. For precision baking, it is worth adjusting. Note this 10ml gap is the Australian (250ml) versus US (240ml) cup; the Australian and modern UK metric cups are identical.

Why is the Australian cup different from the US cup?

The Australian cup is 250ml (a metric cup), while the US legal cup is 240ml. The precise US customary cup is 236.59ml — this is not an "imperial" measure, it is the older US customary value, and the 240ml legal cup is the one normally used today. The difference between Australian and US cups is about 4%, 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 Australian cups to UK, US and metric cup measurements for baking and cooking.

Conversion DirectionChoose which cup standard you are converting from and to (Australian, UK, US or millilitres).

Amount

How many cups (or how much volume) you want to convert.

UK Cup StandardModern UK recipes use the 250ml metric cup (same as Australia); the old imperial cup was 284.13ml (half an imperial pint).

How We Calculate This

The converter translates between Australian, UK and US cups, converting through millilitres as the common base unit. Choose your conversion direction and, for UK cups, pick whether you mean the modern 250ml metric cup or the old 284.13ml imperial cup.

Cup Standards

Australian cup: 250ml (metric cup)
UK metric cup: 250ml (same as Australia — modern UK recipes)
UK imperial cup: 284.13ml (10 fl oz, half an imperial pint — now rare)
US cup: 240ml (US legal cup; 236.59ml is the older US customary value)
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.