BakeCalcs.uk
Grams to Cups Converter
Convert gram measurements to US cups for common baking and cooking ingredients.
How We Calculate This
The converter divides your gram amount by the grams-per-cup value for each ingredient. Different ingredients have different densities, so the conversion factor varies.
The Formula
- Cups = Grams / Grams per cup
- Tablespoons = Cups x 16
Quick Reference
- 125g plain flour = 1 cup
- 200g caster sugar = 1 cup
- 227g butter = 1 cup
- 90g rolled oats = 1 cup
Frequently Asked Questions
One US cup (240ml) of plain or self-raising flour weighs approximately 125g. This is based on the spoon-and-sweep method. If you scoop flour directly from the bag, it may weigh up to 140-150g due to compression.
Cup measurements in recipes are typically expressed as fractions (1/4, 1/3, 1/2, 3/4). The converter detects when your gram amount is close to a standard cup fraction and shows it in that familiar format.
The converter includes the most common baking and cooking ingredients. For unlisted ingredients, you can use the Cooking Weight to Volume Converter which has a broader range of items and density data.
These are US cups (240ml). The Australian metric cup is 250ml — use our Australian to UK Cups Converter for that. There is no standard UK cup measurement, which is why UK recipes typically use grams.
Divide the weight in grams by the grams-per-cup value for your specific ingredient. For example, 250g of plain flour divided by 125g per cup equals 2 cups. Always use ingredient-specific conversions rather than a generic cups-to-grams ratio, as each ingredient has a different density.
The densities follow the King Arthur Baking Ingredient Weight Chart and common UK baking charts: plain flour 125g, granulated/caster sugar 200g, icing sugar 120g, packed brown sugar 220g, butter 227g, cocoa powder 85g (King Arthur unsweetened cocoa), honey 340g, rolled oats 90g and water 240g per US cup. Cocoa varies between brands — some charts use closer to 100g per cup — so weigh with a digital scale for best accuracy.
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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.