About the Cups to Grams Converter

Why cups and grams differ

A cup is a volume measurement, not a weight measurement. The same cup volume holds very different weights depending on the ingredient — a cup of flour weighs far less than a cup of sugar, which weighs less than a cup of honey.

How the conversion works

Each ingredient has a known density. The calculator multiplies your cup volume by the ingredient's specific density to give the gram equivalent.

Accuracy tip For baking, weighing ingredients in grams gives more consistent results than using cups, since packing and sifting affect cup measurements.
Metric vs volume Professional recipes typically use grams. Converting your cup-based recipe to grams once makes it repeatable every time.

Volume vs weight in cooking

Volume measurements (cups, tablespoons, teaspoons) are convenient for liquids and rough measurements but imprecise for dry ingredients. A cup of sifted flour weighs 120g; a cup of packed flour weighs up to 160g. Professional baking recipes use weight (grams) for consistency. When following American recipes in metric kitchens, weight conversions produce more reliable results than using measuring cups.

Flour — 1 cup = 120-130g sifted or 150-160g packed; always use weight for baking
Sugar — 1 cup caster/granulated = 200g; 1 cup icing/powdered = 120g
Butter — 1 cup = 225g; 1 tablespoon = 14g; consistent regardless of how packed
Liquids — 1 cup water = 240ml = 240g; use volume measurements for liquids without issue

Frequently Asked Questions

Why can't I just use 1 cup = 240g for everything?

Different ingredients have different densities. 1 cup of all-purpose flour weighs about 120–130g when spooned and levelled, but 1 cup of water is 240g, and 1 cup of honey is 340g. Using weight measurements (grams) makes baking far more consistent.

How should I measure flour for the most accurate conversion?

The most accurate method is to spoon flour into the measuring cup and level off the top — this is what these conversions assume. Scooping directly from the bag compacts the flour and can add 20–30% more by weight.

Why do cups give different gram weights for different ingredients?

Because different ingredients have different densities. A cup of flour weighs far less than a cup of sugar, which weighs far less than a cup of honey. This converter uses ingredient-specific density values for accurate results.

What cup size does this use?

All conversions use the standard US cup measurement (240 ml). If you are using a metric cup (250 ml) or an Imperial cup (284 ml), the results will differ slightly.

Is it better to weigh baking ingredients?

Yes — professional bakers always recommend weighing ingredients in grams for consistent results. Cups can be inaccurate because scooping compresses some ingredients (like flour) and not others.