Baking Conversion Calculator UK | Cups to Grams Converter 2025

1 US cup of plain (all-purpose) flour equals approximately 125 grams. However, this can vary: 1 cup of self-raising flour is about 125g, bread flour is about 127g, and wholemeal flour is about 120g. For accuracy in UK baking, always weigh ingredients using digital scales rather than relying on cup measurements.

American recipes traditionally use volume measurements (cups, tablespoons) rather than weight measurements (grams) because this was the standard before digital kitchen scales became common. The UK and most of Europe prefer weight measurements as they're more accurate - how you fill a cup of flour can vary the amount by up to 30 grams.

A UK tablespoon is exactly 15ml, while a US tablespoon is 14.79ml (often rounded to 15ml). In practice, this difference is negligible for most recipes. However, an Australian tablespoon is 20ml, which can cause significant differences if following Australian recipes.

For UK fan (convection) ovens, reduce the American temperature by 20°C. For example, 350°F (175°C) in a US recipe becomes 155°C in a UK fan oven. Also reduce cooking time by about 10%. If using a conventional UK oven without fan, use the same temperature as the American recipe converted to Celsius.

One American 'stick' of butter equals 113 grams (4 oz or 8 tablespoons). This is half a US cup. A full US cup of butter is 227 grams (2 sticks). UK butter is typically sold in 250g blocks, so one US stick is roughly half a UK block minus about 12g.

No. A US cup is 236.6ml while a UK (Imperial) cup is 284.1ml - about 20% larger. However, the UK rarely uses cup measurements in modern recipes. When British recipes do mention cups, they usually mean US cups. Always check which measurement system a recipe is using.

UK caster sugar is called 'superfine sugar' in America, though it can be hard to find. The closest American equivalent is regular granulated sugar, which has slightly larger crystals. For delicate cakes and meringues, you can pulse regular sugar in a food processor to make it finer. 1 cup of caster sugar weighs approximately 200g.

Multiply inches by 2.54 to get centimetres. Common conversions: 8 inch = 20cm, 9 inch = 23cm, 10 inch = 25cm. American recipes often use 9x13 inch pans which equal 23x33cm. If your tin is slightly different, adjust baking time - smaller tins need shorter times, larger tins need longer.