Cups to Grams Converter
Convert cups to grams (and back) for flour, sugar, butter, and more. Pick your ingredient and amount to get an accurate weight, since a cup of each weighs differently. Calculates in your browser.
Weight
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Show the math
Volume turns into weight through the ingredient's density:
grams = milliliters × (grams per cup ÷ ml per cup)
Cup measures vary because ingredients pack differently, a cup of flour and a cup of honey weigh very different amounts. The grams per cup come from USDA FoodData Central's standard cup weights; how you scoop and pack still changes the real weight, so for baking, weighing in grams is always the most reliable.
What this does
A cups to grams converter turns cup measures into grams (and back) for flour, sugar, butter, and more, since a cup of each ingredient weighs differently.
How to use it
- Pick your ingredient.
- Enter the amount in cups or grams.
- Read the converted weight.
- Switch units to run it in reverse.
How it works
Each ingredient has its own density, taken from USDA FoodData Central’s standard cup weights. A cup of all-purpose flour is 125 g while a cup of honey is 339 g, so the conversion depends on what you measure.
grams = cups × grams per cup (by ingredient)
Example
One cup of all-purpose flour is 125 grams; half a cup of packed brown sugar is 110 grams.
Last updated .
Frequently asked questions
Why is there no single cups-to-grams number?
Because ingredients have different densities. A cup of all-purpose flour is 125 g while a cup of honey is 339 g, so the conversion depends on what you are measuring.
How is the weight worked out?
The volume is turned into milliliters, then multiplied by the ingredient’s density (grams per cup ÷ ml per cup). Choose a weight unit to run it in reverse and get cups from grams.
How accurate are the densities?
They are USDA FoodData Central’s standard cup weights, but how you scoop and pack an ingredient still changes its real weight. For baking, weighing in grams on a scale is always the most reliable method.
Is my data stored?
No. Everything is calculated locally in your browser — nothing is uploaded or saved.
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