120 Grams to Cups

120 grams is 1 cup of all-purpose flour, 0.61 cups of granulated sugar or 0.53 cups of butter. The correct cup result depends on the ingredient because grams measure weight and cups measure volume.

Choose an ingredient in the converter or use the complete chart below. All results use US customary cups and a clearly named ingredient state.

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Grams to Cups Converter

Choose the ingredient before converting because every ingredient has a different weight per cup.

Grams to Cups Converter

Results use the documented ingredient state and one US customary cup.

Rounded to two decimal places for cups and the nearest gram for reverse conversions.

120 Grams = Exactly One Cup of Flour

This is the conversion every baker should know: 120 grams of all-purpose flour, spooned and levelled, is exactly one US cup. That same cup measure holds far less of a heavier ingredient — 120 grams of sugar is only about three-fifths of a cup, and of honey barely a third.

How Many Cups Is 120 Grams?

One weight, three cups: 120 grams is 1 cups of flour, 0.61 cups of sugar, or 0.53 cups of butter — the flour figure landing exactly on the cup line.

Here is the direct ingredient-by-ingredient answer. The second column shows the source weight for one US cup, so the calculation remains transparent.

120 grams of Grams in 1 US cup Equivalent in cups
All-Purpose Flour 120 g 1 cup
Granulated Sugar 198 g 0.61 cups
Butter 227 g 0.53 cups
Brown Sugar 213 g 0.56 cups
Powdered Sugar 113 g 1.06 cups
Unsweetened Cocoa Powder 84 g 1.43 cups
Old-Fashioned Rolled Oats 89 g 1.35 cups
Honey 340 g 0.35 cups
Fresh Milk 244 g 0.49 cups
Vegetable Oil 198 g 0.61 cups
Long-Grain White Rice 185 g 0.65 cups
Water 237 g 0.51 cups
Chocolate Chips 170 g 0.71 cups
Whole Almonds 142 g 0.85 cups
Table Salt 288 g 0.42 cups
Baking Powder 192 g 0.62 cups
Cornstarch 113 g 1.06 cups
Peanut Butter 256 g 0.47 cups
Maple Syrup 312 g 0.38 cups
Cream Cheese 227 g 0.53 cups
Yogurt 227 g 0.53 cups
Raisins 149 g 0.81 cups

Results are rounded to two decimal places. Ingredient brands, moisture and measuring technique can cause small real-world differences.

A useful flour reference point

For this site, 120 grams is exactly one US cup of all-purpose flour when it is fluffed, spooned and leveled. The same 120 grams is only about 0.61 cups of granulated sugar and about 0.53 cups of butter.

The one-cup flour relationship applies to the measurement method shown here. Scooping flour directly from a bag can compress more flour into the cup and break that relationship.

This amount is especially helpful when converting American flour measurements to weights. It can also appear in cake layers, muffins and small loaves where flour measurement has a noticeable effect on texture.

Calculation and practical measures

Use this formula for any ingredient:

Cups = grams ÷ grams per cup

For all-purpose flour: 120 ÷ 120 = 1 cup, 1 cup.

For granulated sugar: 120 ÷ 198 = 0.61 cups. For butter: 120 ÷ 227 = 0.53 cups.

Cocoa powder is lighter, so 120 grams occupies 1.43 cups. Rolled oats occupy 1.35 cups. These examples show why ingredient selection is required.

120 Grams of Flour, Sugar and Butter

The three most common kitchen answers, calculated from the same documented dataset.

All-Purpose Flour

1 cup

Uses 120 grams per cup. Fluff, spoon and level.

Open flour guide

Granulated Sugar

0.61 cups

Uses 198 grams per cup. Level without packing.

Open sugar guide

Method and source

How this conversion was checked

Each result uses the grams-per-cup value for the selected ingredient. Results are rounded for practical kitchen use.

Primary reference: King Arthur Baking Ingredient Weight Chart

Cup standard: NIST US customary cup reference

Download Sources PDF

View the ingredient dataset

120 Grams to Cups FAQ

How many cups is 120 grams?
The ingredient must be known. 120 grams is 1 cup of all-purpose flour, 0.61 cups of granulated sugar or 0.53 cups of butter using the standards documented on this page.
How much is 120 grams of flour in cups?
120 grams of all-purpose flour is 1 US cup, based on 120 grams per cup and the fluff, spoon and level method.
How much is 120 grams of sugar in cups?
120 grams of white granulated sugar is 0.61 US cup using 198 grams per cup.
Why do different websites give different answers?
Cup weights change with the ingredient, its form and the measuring method. Check whether the source uses a US customary cup, a 250 milliliter metric cup, packed ingredients or a different recipe-house standard.
Should I use the gram amount or the cup result?
Use the original gram amount when you have a kitchen scale. The cup conversion is most helpful when you only have US volume measures.
Why does 120 grams equal one cup of flour here?
This site uses 120 grams per US cup for all-purpose flour that is fluffed, spooned into the cup and leveled. Scooping directly from a bag can produce a heavier cup.

Nearby Gram Amounts

Choose another page without changing the ingredient standard.

60 grams75 grams80 grams90 grams100 grams125 grams150 grams180 gramsCups to grams

Written & reviewed by

William Leo Founder & Editor, GramstoCup.co

William is a hands-on home baker who founded GramstoCup.co to take the guesswork out of kitchen conversions. He built and maintains the site's ingredient-density dataset, cross-checking every value against published authorities — King Arthur Baking, USDA FoodData Central, NIST and Rose Levy Beranbaum's The Cake Bible — instead of copying figures from other converters, and rebuilds the tables whenever a source updates.

✓ Reviewed for accuracy · Last reviewed September 20, 2026 · Methodology · About the author