Convert Cups to Grams
Density: Water · 236.6 g per US cup
US cup = 236.6 ml · Metric cup = 250 ml · Australian cup = 250 ml
Cups measure volume; grams measure weight. The conversion depends on the ingredient's density.
Why ingredient density matters
A cup of flour and a cup of honey occupy the same volume, but they weigh very different amounts. One US cup (236.6 ml) of all-purpose flour weighs about 120 g, while one US cup of honey weighs about 340 g. Any converter that treats "1 cup = 240 g" for everything is guessing.
This converter uses published grams-per-cup reference values for over 100 common ingredients, so the density is built into every calculation. Pick your ingredient, enter the amount, and the conversion updates as you type.
Cup standards: a US customary cup is 236.6 ml, a metric cup is 250 ml, and an Australian cup is also 250 ml (it differs from the US cup, not from the metric cup). Choose the standard your recipe uses for accurate results.
Frequently asked questions
How many grams are in a cup?
It depends on the ingredient. Water is 236.6 g per US cup, all-purpose flour is about 120 g, granulated sugar about 198 g, and honey about 340 g. Always convert with the ingredient's density, never a flat number.
What is the difference between a US cup, a metric cup and an Australian cup?
A US customary cup is 236.6 ml. A metric cup is 250 ml. An Australian cup is also 250 ml. Using the wrong cup standard can shift a recipe by about 6 percent, so pick the one your recipe was written for.
How accurate are the ingredient densities?
Values are rounded grams-per-US-cup figures from widely published cooking references. Natural products vary by brand, grind and packing (packed brown sugar versus sifted flour), so treat results as reliable kitchen estimates. For critical baking, confirm with a kitchen scale.
Can I convert grams back to cups?
Yes. Enter the amount in grams as the "from" unit and choose any cup or volume unit as the "to" unit. Use the swap button to reverse a conversion instantly.
Why do my baked goods fail when I measure by cups?
Volume measurements vary with how you fill the cup. A scooped cup of flour can weigh 140 g or more versus 120 g when spooned and levelled. Weighing ingredients in grams removes that variation and is the single biggest reliability upgrade for baking.