What it does
A cup of flour and a cup of honey take up the same space but weigh very different amounts. This converter knows how much a level cup of 42 common ingredients weighs, so it can turn a volume (cups, spoons, ml, fluid ounces) into a weight (grams, ounces, pounds), or a weight back into cups. It also lists the same amount in every unit at once.
The weights are approximate. They come from the household measures in USDA FoodData Central. How you fill the cup matters: scooped flour packs down and can weigh 10-20% more than flour spooned in and levelled. When you are changing the size of a recipe, the recipe scaler does the sums for every line, and the oven temperature converter handles the oven setting.
How to use it
- Pick the ingredient.
- Type the amount and choose the unit it is in.
- Choose the unit you want. The answer updates as you type, and the list below shows every unit.
What each setting does
- Ingredient: sets the weight of one level US cup, shown in the sentence under the answer.
- From / To: US cup (236.6 ml), metric cup (250 ml, used in Australia, Canada and India), UK cup (284 ml), tbsp, tsp, ml, US fl oz, g, oz and lb. Any unit converts to any other.
- ⇄: swaps From and To.
- Reset: goes back to 1 US cup of flour in grams.
Rounding: grams and ml are whole numbers from 10 up and one decimal below; other units show up to 2 decimals.
Worked example
1 US cup of all-purpose flour is 125 g. 1 cup of granulated sugar is 200 g, and 1 cup of water is 237 g. Going the other way, 100 g of butter is 100 ÷ 227 = 0.44 US cup, which the list also shows as about 7.05 tbsp.
FAQs
Why does my packet say a cup of flour is 120 g or 130 g? Every brand and baker fills the cup a little differently. Any figure from 120 to 140 g is normal; weigh it if the recipe is fussy.
Is a tablespoon the same everywhere? Not quite. This uses the US tablespoon (14.8 ml). An Australian tablespoon is 20 ml.
Brown sugar seems heavy. Recipes usually mean brown sugar packed firmly into the cup, which is how it is weighed here.
Where the numbers come from
- USDA FoodData Central household measures (grams per cup, US public domain), fdc.nal.usda.gov, checked 2026-11-10. Almond flour is fibub's own working. Check the official source.
- Cup sizes: US cup 236.6 ml, metric cup 250 ml, UK (imperial) cup 284 ml.
Standard scientific values, such as constants, atomic weights and melting points, are facts found in every textbook; we name where ours were checked. If you are an author or publisher and want a value, a credit or a table changed or removed, tell us and we will act quickly.
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Last updated 2026-11-10.