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Free Cups to Grams Converter (+ Guide)

A free cups to grams converter for 40 ingredients, with each weight from USDA FoodData Central.

Navid Moazzezby Navid Moazzez·Updated Oct 2, 2026·2 min read·
Cups to grams, for 40 ingredients
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Turn cups and spoons into grams for 40 ingredients, from USDA's weight per cup.

1

Your numbers

A cup here is a US cup, 8 fluid ounces, dipped and leveled the way USDA measured it.

2

Your result

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This free cups to grams converter turns cups, tablespoons and teaspoons into grams for 40 common ingredients, from flour and sugar to butter and honey.

It shows the ingredient cup by cup, from ¼ to 1, and every ingredient's weight per cup side by side.

I built it because a cup of flour and a cup of honey weigh very different amounts, and generic converters that use water for everything get baking wrong.

Here's why the weight changes, where the numbers come from, and how to measure.

key_takeaways.mdTL;DR

Key takeaways

A cup is a measure of space, not weight, so each ingredient weighs something different.
A cup of all-purpose flour weighs about 125 g, sugar 200 g, butter 227 g and honey 339 g.
The weights come from USDA FoodData Central, by each food's FDC ID.
A US cup is 8 fluid ounces, about 237 mL, as NIST defines it.
Weighing beats measuring: a packed cup of flour weighs more than a dipped and leveled one.

What is a cups to grams converter?

A cups to grams converter turns a measure of volume into a weight for a given ingredient.

Bakers outside the US weigh everything, and most US recipes use cups, so it's the bridge between the 2.

Why a cup weighs different amounts

A cup holds the same space whatever you put in it. But flour is light and airy, and honey is dense.

0 cup of all-purpose flour
0 cup of granulated sugar
0 cup of butter
0 cup of honey

Each figure is USDA's own, from FoodData Central, the US Department of Agriculture's food database.

How to convert cups to grams

Pick the ingredient and type the amount.

Convert cups to grams0/5

A worked example

Here's the example the calculator loads: 2 cups of all-purpose flour.

1 cup weighs 125 g in USDA's data, so 2 cups weigh 250 g, or 8.82 oz.

How to measure a cup the right way

USDA's flour weight is a dipped and leveled cup.

  • Packing flour into the cup, which adds weight
  • Measuring sticky ingredients without greasing the cup first
  • Using a liquid measuring jug for dry ingredients
  • Using a cup from another country's set for a US recipe

Who is the cups to grams converter for?

It's for bakers, cooks with US recipes abroad, and anyone with a kitchen scale, and these tools help around it.

Weigh it once, and the recipe comes out the same every time.

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Cups to Grams Converter FAQs

Questions about the cups to grams converter? Here's what to know.

A cups to grams converter turns a cup measure into a weight for a given ingredient.

This free one covers 40 ingredients with USDA's weights.

About 125 g of all-purpose flour, by USDA FoodData Central.

About 200 g of granulated sugar.

About 227 g, by USDA FoodData Central.

A cup measures space, and flour is lighter for its size than sugar.

A US cup is 8 fluid ounces, about 237 mL, as NIST defines it.

Nutrition labels round it to 240 mL.

From USDA FoodData Central's SR Legacy data, each ingredient's cup portion by its FDC ID.

Weighing is more accurate, since how you fill a cup changes what it holds.

Yes, it's free with no sign-up.

It runs in your browser, and your numbers stay on your device.

I did.

I'm Navid Moazzez, and I made the cups to grams converter as one of my free tools on navid.me.

More about me.

Navid Moazzez

AI business strategist & AI OS builder

Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.

Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.

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