Why measure flour by weight instead of cups?

Weight is more accurate than volume. How tightly flour is packed in a cup can vary by 20-30 grams, significantly affecting baked goods. Weighing ensures consistent results.

Can I convert grams to cups?

Yes! Use the toggle at the top to switch to Grams → Cups mode. Enter grams, select your flour type, and get the result in cups. The conversion works both directions seamlessly.

How much does 1 cup of flour weigh?

All-purpose flour: 125g per cup. Bread flour: 127g. Cake flour: 114g. Whole wheat: 120g. The type and how it's measured affects the weight.

Should I sift flour before measuring?

If recipe says 'sifted,' sift first then measure. Otherwise, spoon flour into measuring cup and level off without packing. Never scoop directly from bag – this compacts flour.

Can I use this for other ingredients?

No, different ingredients have different densities. Sugar, butter, nuts, etc. all have different cup-to-gram conversions. Use ingredient-specific converters for accuracy.

How many grams are in a cup of flour?

1 US cup of all-purpose flour = 125 g when spooned and leveled (King Arthur standard). Other flours vary: bread flour ≈ 127 g, cake flour ≈ 114 g, whole wheat ≈ 120 g. To convert, multiply cups by the per-flour gram value, or divide grams by it to go the other way. Weighing is far more accurate than measuring by volume — the same 'one cup' can swing 20–30 g depending on whether you spoon, scoop, or shake.

Cups ↔ Grams Flour Converter

Convert cups of flour to grams or grams to cups for accurate baking. Bidirectional conversion for all-purpose, bread, cake, and whole wheat flour.

Reviewed by the Calcura editorial team · Last reviewed November 1, 2025

Question: How many grams are in a cup of flour?
Answer: 1 US cup of all-purpose flour = 125 g when spooned and leveled (King Arthur standard). Other flours vary: bread flour ≈ 127 g, cake flour ≈ 114 g, whole wheat ≈ 120 g. To convert, multiply cups by the per-flour gram value, or divide grams by it to go the other way. Weighing is far more accurate than measuring by volume — the same 'one cup' can swing 20–30 g depending on whether you spoon, scoop, or shake.

▸Show formula & caveats

Formula: 1 US cup all-purpose flour = 125 g (spoon-and-level method)
Caveats: US vs UK/AU cups differ: 1 US cup = 236.6 mL, 1 metric cup = 250 mL.
Scooping directly from the bag packs the flour and adds ~20–30 g per cup.
European all-purpose (Type 405/550) has slightly different density — if the recipe is European, trust its gram value.

Cups of Flour

Flour Type

Flour Cups to Grams Conversion Table

Weights assume the spoon-and-level method for US customary cups. Packing the flour adds roughly 20–30 g per cup.

Cups	All-Purpose (g)	Bread Flour (g)	Cake Flour (g)	Whole Wheat (g)
¼ cup	31	32	28	30
⅓ cup	42	42	38	40
½ cup	63	63	57	60
⅔ cup	83	85	76	80
¾ cup	94	95	85	90
1 cup	125	127	114	120
1½ cups	188	191	170	180
2 cups	250	254	228	240
3 cups	375	381	342	360
4 cups	500	508	456	480

What This Calculator Does

This bidirectional converter translates between cups and grams for five flour types: all-purpose, bread, cake, whole wheat, and self-raising. Each flour has a different density — all-purpose is ~125 g/cup (spooned and leveled), bread flour ~127 g/cup, cake flour ~114 g/cup — so one generic conversion doesn't work. Select your flour type, enter an amount in either unit, and the calculator applies the correct gram-per-cup value. Weighing is almost always more accurate than measuring by volume: the same 'one cup' can vary by 20–30 grams depending on whether you spoon, scoop, or shake.

When To Use This Calculator

Following International Baking Recipes

You found an amazing French croissant recipe that calls for 500g of bread flour, but you only have measuring cups. Convert 500g to approximately 3.94 cups (about 4 cups) to get started.

Increasing Baking Accuracy

Your chocolate chip cookies always turn out different each time. Start measuring flour by weight: 250g (2 cups) all-purpose flour ensures consistency. Same weight every time means consistent cookies every time.

Switching Between Flour Types

A recipe calls for 2 cups all-purpose flour (250g), but you're substituting cake flour. Since cake flour is lighter (114g per cup), you need 2.19 cups (about 2¼ cups) to maintain the same weight.

Scaling Recipes Up or Down

You want to make half a batch of bread that calls for 4 cups (508g) bread flour. Calculating 254g is easier than measuring 2 cups perfectly. Halving by weight is more precise than volume.

How It Works

This converter uses scientifically tested flour weight standards from professional baking sources like King Arthur Baking and the USDA National Nutrient Database. Each flour type has a standard weight per cup: all-purpose flour weighs 125g per cup when properly measured (spooned and leveled, not scooped). Bread flour is denser at 127g per cup because of higher protein content. Cake flour is lighter at 114g per cup because it's more finely milled. When you enter cups, the calculator multiplies by the appropriate grams-per-cup value for your flour type. When you enter grams, it divides by that value. The bidirectional conversion ensures you can work with any recipe format.

Formula

Grams = Cups × Grams per Cup (varies by flour type) • Cups = Grams / Grams per Cup • All-purpose: 125g/cup • Bread: 127g/cup • Cake: 114g/cup

Real-World Example

Scenario

Maria is making sourdough bread using a recipe that calls for 3.5 cups of bread flour. She wants to measure by weight for better accuracy, but the recipe only provides cup measurements.

Calculation

Flour type: Bread flour (127g per cup) Cups needed: 3.5 cups Conversion: 3.5 cups × 127g per cup = 444.5 grams

Result

Maria should measure 445g of bread flour on her kitchen scale. This ensures her bread dough has exactly the right flour-to-water ratio (65-70% hydration for sourdough). When she makes the recipe again, measuring 445g guarantees consistency—no variation from how tightly flour was packed into cups.

Common Mistakes to Avoid

Mistake: Scooping flour directly from the bag with measuring cup

Solution: Scooping compacts flour, giving you 30-50g more per cup than intended—enough to make baked goods dry and dense. Always spoon flour into the measuring cup and level with a knife, or better yet, weigh it.

Mistake: Using the same conversion for all flour types

Solution: Different flours have different densities. 1 cup all-purpose flour (125g) ≠ 1 cup cake flour (114g). When substituting flour types, use the correct conversion or your ratios will be off, affecting texture and rise.

Mistake: Converting by weight but not adjusting for flour type substitutions

Solution: If a recipe calls for 250g all-purpose flour and you substitute cake flour, you still use 250g—weight-for-weight substitution works. But if converting from cup measurements, use the correct flour type's cup weight.

Mistake: Not leveling off the measuring cup

Solution: A heaping cup can contain 150-160g instead of 125g. Always level flour measurements with a straight edge (butter knife works) for the accurate cup-to-gram ratio to apply.

Cups to Grams Flour vs. Related Converters

Grams to Tablespoons Converter

For smaller flour measurements in recipes (like 1-2 tablespoons for dusting or thickening). Tablespoon-to-gram conversions are useful when scaling down recipes or measuring small amounts precisely.

Ounces to Grams Converter

Some American recipes list flour in ounces instead of cups. Use this to convert ounces to grams (1 oz ≈ 28.35g), then use the cups-to-grams converter if you need cup measurements.

Recipe Scaling Calculator

After converting flour to grams, use this to scale entire recipes up or down while maintaining proper ratios. Especially useful for batch baking with accurate weight measurements.

When This Isn't the Right Tool

Flour types outside the list

Use instead: Rye, 00, semolina, gluten-free blends, almond, and coconut flours all have different densities. Look up the specific flour's gram-per-cup value from King Arthur Baking or the product packaging rather than using the all-purpose default.

Sifted-flour recipes

Use instead: If the recipe says 'sifted flour,' sifting reduces density — a sifted cup weighs 15–25% less than a spooned cup. Either sift first and use the sifted weight (~100 g/cup for all-purpose), or weigh the unsifted amount and sift it afterward.

Recipes using a metric cup

Use instead: A US cup is 237 ml; an Australian/UK metric cup is 250 ml (about 5% larger). If your recipe specifies a metric cup, weigh by grams directly or adjust your result upward by ~5%.

High-altitude or commercial baking

Use instead: Altitude changes leavening behavior and hydration needs; commercial baking requires lot-tested formulations. Use tested-kitchen adjustments (King Arthur, NIST, or your recipe developer's specs) instead of theoretical gram-per-cup values.

How to Verify This Calculation

Cross-check on a digital scale. Spoon all-purpose flour into a measuring cup without packing, level with a knife, and weigh it — you should see roughly 120–130 g. If you're seeing 150 g or more, you're scooping and packing rather than spooning (a common source of dry, tough baked goods).

Sources

King Arthur Baking — Ingredient Weight Chart — Widely used baking reference with tested weights for flours, sugars, fats, and common ingredients.
USDA FoodData Central — USDA database of food composition; each entry lists nutrient values per 100 g along with common household measures.
NIST Handbook 44 — Weighing and Measuring Devices — U.S. national standards for measurement devices, including cup and tablespoon specifications.