Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Flour Cups to Grams Converter (US Cup)
grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.
A US cup of spooned all-purpose flour is about 120 g. Scoop-and-level from the bag can hit 140 g and dry out a cake. Weigh if the crumb matters. Bread flour is denser; cake flour is lighter.
US cups of all-purpose flour
cup → g
120 g
2½ cups AP flour → 300 g. ¼ cup → 30 g.
- You typed
- 1 cup
- One g is
- 0 cup
- How it’s calculated
- grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
US cups of all-purpose flour
The “US cups of all-purpose flour” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
A US cup of spooned all-purpose flour is about 120 g. Scoop-and-level from the bag can hit 140 g and dry out a cake. Weigh if the crumb matters. Bread flour is denser; cake flour is lighter. grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g. Example: 2½ cups AP flour → 300 g. ¼ cup → 30 g.
grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.
Example: 2½ cups AP flour → 300 g. ¼ cup → 30 g.
When to use this Flour Cups to Grams
Common use cases
- A US cup of spooned all-purpose flour is about 120 g. Scoop-and-level from the bag can hit 140 g and dry out a cake. Weigh if the crumb matters. Bread flour is denser; cake flour is lighter.
- Sanity-check with this case: 2½ cups AP flour → 300 g. ¼ cup → 30 g.
- The relationship is: grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: US cups of all-purpose flour
- grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.
- Example on the page: 2½ cups AP flour → 300 g. ¼ cup → 30 g.
How to Convert Flour Cups to Grams Step-by-Step
- 1Enter US cups of all-purpose flour. Use the values you have, not a catalog average, unless that is all you know.
- 2grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.
- 3Worked case: 2½ cups AP flour → 300 g. ¼ cup → 30 g.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.
2½ cups AP flour → 300 g. ¼ cup → 30 g.
Example: set US cups of all-purpose flour = 1, then read the result.
Variable definitions
- value
US cups of all-purpose flour
The “US cups of all-purpose flour” field. Default 1; typical range 0–50.
- The conversion (grams ≈ cups × 120 (King Arthur spooned AP flour). Packed from the bag is often 130–140 g.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Closer to 128 g per cup. Start at 120, then add a spoon if the dough looks wet.
Related calculators
Unit Converters
- Sugar Cups to GramsWhite granulated sugar sits near 200 g per US cup. It packs less drama than flour. Caster/superfine is similar; powdered sugar with cornstarch is closer to 120 g and is a different page in spirit.
- Brown Sugar Cups to GramsPacked light or dark brown sugar is about 220 g per US cup. “Packed” means you pressed it. A loose scoop can miss 30 g and flatten cookies. Light and dark weigh nearly the same; molasses is the flavor, not the scale.
- Cocoa Powder Cups to GramsUnsweetened cocoa powder is fluffy. A US cup is about 85 g sifted/spooned. Dutch-process vs natural does not change the gram target as much as how hard you tap the cup.
- Oats Cups to GramsOld-fashioned rolled oats are about 90 g per US cup. Quick oats similar. Steel-cut are denser (~160 g). Overnight-oat blogs that say “1 cup” usually mean rolled.
- Pinch to GramsA pinch of table salt is about 0.36 g. Kosher flakes need more volume for the same sodium. If a dough formula lists salt as 2% of flour, use the scale, not your fingers.
- Sourdough HydrationHydration is water ÷ flour × 100. Starter is extra flour and water if you include it. 70% on bread flour handles easily; 80% wants a wet-hand technique. Whole grain drinks more than the percentage admits.
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4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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