How to Use This Calculator
Select your ingredient from the dropdown, enter the amount in cups, and click Convert. The calculator accounts for each ingredient's density — 1 cup of flour weighs significantly less than 1 cup of sugar, for example.
For fractional amounts, use decimals: half a cup is 0.5, a quarter cup is 0.25, and a third cup is approximately 0.333.
Why Cup Measurements Vary
The weight of a cup depends entirely on how it's filled. A cup of all-purpose flour can weigh anywhere from 120g to 160g depending on whether it was scooped, spooned, or sifted. This calculator uses standard weights based on the spoon-and-level method — the most common approach in published recipes.
If you're baking seriously, a kitchen scale is the only way to guarantee consistent results. Once you switch to grams, you'll never go back.
Frequently Asked Questions
How many grams is 1 cup of flour?
1 cup of all-purpose flour is 120g using the spoon-and-level method. If you scoop directly from the bag, you may end up with 140–160g due to compaction.
How many grams is 1 cup of sugar?
1 cup of granulated white sugar is 200g. Brown sugar packed is 220g per cup. Powdered sugar is lighter at around 120g per cup.
How many grams is 1 cup of butter?
1 cup of butter is 227g, which is 2 standard US sticks (each stick is 113g or ½ cup).
Does this work for liquids?
Yes. For water and most liquids, 1 cup is approximately 240ml or 240g. Heavier liquids like honey (340g per cup) and lighter ones like oil (218g per cup) differ significantly — this calculator accounts for those differences.
Frequently Asked Questions
Why do different ingredients have different gram weights per cup?
Because different ingredients have different densities. A cup is a fixed volume, but the weight of that volume depends on how dense the ingredient is. Water weighs 237g per cup; flour weighs 120g; honey weighs 340g. Every ingredient needs its own conversion — you can't use a single cups-to-grams conversion factor.
How many grams in a half cup?
It depends on the ingredient. Half a cup of all-purpose flour is 60g. Half a cup of granulated sugar is 100g. Half a cup of butter is 113g. Half a cup of water or milk is approximately 120g. Use this calculator to find the gram weight for any specific ingredient and fraction.
Are these weights the same in all countries?
Yes — a gram is a gram everywhere. However, cup sizes vary slightly by country. This calculator uses the US cup (236.6ml). The metric cup used in Australia and Canada is 250ml, so weights per cup would be slightly higher. For most home cooking, the difference is negligible.