Cooking

Convert Cups to Grams for Baking

Q: How many grams is 1 cup of all-purpose flour?

1 cup of all-purpose flour weighs approximately **125 grams** using the standard spoon-and-level method, according to USDA food composition data. If you scoop the flour directly from the bag, the cup can pack to 150 g or more — a 20% overshot that leads to dense baked goods. For consistent results, always use a kitchen scale.

Q: Why do cups and grams give different results for different ingredients?

A cup measures **volume** (240 mL in the US), while grams measure **mass**. Each ingredient has a unique density — how much mass fits into that fixed volume. Granulated sugar (200 g/cup) is nearly twice as heavy as powdered sugar (120 g/cup) for the same cup volume, simply because granulated crystals pack more densely. This is why volume measurements are inherently less precise than weight measurements in baking.

Q: Is 1 cup the same in all countries?

No. A US legal cup = **240 mL**, an Australian/Canadian metric cup = **250 mL**, and an old imperial UK cup = **284 mL**. That's a 6–18% volume difference. If you follow a recipe from Australia without adjusting, each cup of flour you measure will be 12.5 g heavier than the recipe intends. Always check a recipe's country of origin and use the corresponding cup size.

Q: How do I convert grams back to cups?

Simply reverse the formula: **Cups = Grams ÷ Density_Factor**. For example, 250 g of all-purpose flour ÷ 125 g/cup = **2 cups**. 300 g of granulated sugar ÷ 200 g/cup = **1.5 cups**. This is especially useful when your scale gives you the total weight and you need to communicate the amount in cups to someone else.

Q: Why are oil cup-to-gram conversions important for calorie tracking?

Oils are calorie-dense: olive oil provides approximately **884 kcal per 100 g** (USDA). At 216 g per cup, a single cup of olive oil contains roughly **1,910 kcal**. Even a 2-tablespoon (1/8 cup) error equals ~27 g of oil and ~239 extra kcal. For anyone tracking macros or calories, converting oils from cups to grams and then to kcal using USDA nutrient data is far more accurate than relying on volume alone.

Q: What is the best technique for measuring flour by cups if I don't have a scale?

Use the **spoon-and-level method**: (1) fluff the flour in its container with a spoon, (2) spoon flour into the measuring cup until overflowing, (3) level the top with a straight-edge knife. Never shake, tap, or scoop the cup into the bag. This technique consistently produces cups closest to the 125 g/cup standard used by recipe developers and USDA measurement guidelines.

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This converter translates cup measurements into grams for the most common baking ingredients — all-purpose flour, bread flour, cake flour, granulated sugar, powdered sugar, brown sugar, and common cooking oils. Because a cup is a volume unit while grams measure mass, the conversion factor depends entirely on the ingredient's density. For example, 1 cup of all-purpose flour weighs approximately 125 g, while 1 cup of granulated sugar weighs about 200 g — a 60% difference for the exact same volume. Use this tool whenever a recipe lists cups but your kitchen scale (or a professional recipe) requires grams for precise, reproducible results.

Last reviewed: April 18, 2026 Verified by Martín Rodríguez Source: USDA FoodData Central — Food Composition Databases, NIST Handbook 133 — Checking the Net Contents of Packaged Goods (US cup definitions) 100% private

When to use this calculator

Scaling a bread recipe that lists 3 cups of bread flour to grams for a digital kitchen scale
Converting a US cake recipe to metric units for baking in Europe or Australia
Precisely measuring cake flour for delicate sponge cakes where ±10 g affects crumb texture
Doubling or halving a cookie recipe and needing exact gram equivalents to avoid compounding cup-rounding errors
Comparing nutrition labels that list values per 100 g against a recipe's cup-based ingredient quantities
Converting cooking oil volumes (cups) to grams for macro-tracking or precise calorie counting in meal prep

Example Calculation

Example
Result

Result: Result

How it works

3 min read

How It's Calculated

The core formula is straightforward:

Grams = Cups × Density_Factor (g per cup)

Each ingredient has a fixed density factor derived from USDA food composition data and standard culinary measurement conventions. The density factor accounts for how tightly particles pack inside a cup at room temperature.

Examples:
  All-purpose flour : 1 cup = 125 g  → 2.25 cups × 125  = 281.25 g
  Bread flour       : 1 cup = 127 g  → 1.5  cups × 127  = 190.5  g
  Cake flour        : 1 cup = 114 g  → 0.75 cups × 114  =  85.5  g
  Granulated sugar  : 1 cup = 200 g  → 0.5  cups × 200  = 100    g
  Powdered sugar    : 1 cup = 120 g  → 1    cup  × 120  = 120    g
  Brown sugar       : 1 cup = 220 g  → 2    cups × 220  = 440    g
  Vegetable oil     : 1 cup = 218 g  → 0.25 cups × 218  =  54.5  g
  Olive oil         : 1 cup = 216 g  → 1    cup  × 216  = 216    g

One US legal cup = 240 mL. Density factors above assume room-temperature ingredients and standard sifting/spooning technique.

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Reference Table

Ingredient	1 Cup (g)	½ Cup (g)	¼ Cup (g)	Source
All-purpose flour (spooned)	125	62.5	31.25	USDA SR Legacy
Bread flour	127	63.5	31.75	USDA SR Legacy
Cake flour (sifted)	114	57	28.5	USDA SR Legacy
Whole-wheat flour	120	60	30	USDA SR Legacy
Granulated white sugar	200	100	50	USDA SR Legacy
Powdered / icing sugar	120	60	30	USDA SR Legacy
Light brown sugar (packed)	220	110	55	USDA SR Legacy
Vegetable / canola oil	218	109	54.5	USDA SR Legacy
Olive oil	216	108	54	USDA SR Legacy
Coconut oil (melted)	218	109	54.5	USDA SR Legacy

> Note: Flour values assume the "spoon-and-level" method. Scooping directly from the bag can increase weight by 20–30 g per cup (up to +24%).

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Typical Examples

Example 1 — Classic Chocolate Chip Cookies

A standard recipe calls for 2¼ cups all-purpose flour.

2.25 × 125 g = 281.25 g ≈ 281 g

Weighed correctly, this falls within the 270–290 g range that yields the ideal chewy texture. If you scooped the flour (packed cup ≈ 150 g), you would use 337 g — 56 g extra — producing a dry, crumbly cookie.

Example 2 — Powdered Sugar for Frosting

A buttercream recipe calls for 3 cups powdered sugar.

3 × 120 g = 360 g

Using a scale here is especially important: powdered sugar compresses easily, and a packed cup can reach 160 g, which would add 120 g of extra sugar and make the frosting noticeably sweeter and stiffer.

Example 3 — Olive Oil in Focaccia

A focaccia dough calls for ½ cup olive oil for the dough plus ¼ cup for the pan.

Dough  : 0.5 × 216 g = 108 g
Pan    : 0.25 × 216 g =  54 g
Total  : 162 g

When calorie-counting, 162 g of olive oil ≈ 1,426 kcal (USDA: ~8.8 kcal/g for olive oil).

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Common Mistakes

1. Scooping flour directly from the bag. This packs the cup and can add 20–30 g per cup (up to +24%), resulting in dense, dry baked goods. Always spoon flour into the cup and level with a straight edge — or better yet, use a scale.

2. Assuming all sugars weigh the same. Granulated sugar (200 g/cup), powdered sugar (120 g/cup), and packed brown sugar (220 g/cup) differ by up to 83%. Swapping them 1:1 by cups without checking grams is a frequent recipe failure.

3. Using the same factor for sifted vs. unsifted flour. Sifted cake flour can weigh as little as 100 g/cup vs. 114 g unsifted. Always follow the recipe's instruction ("1 cup, sifted" ≠ "1 cup sifted").

4. Treating cup volumes as universal. A US cup = 240 mL, but a metric cup (Australia, Canada) = 250 mL and an old UK cup = 284 mL. A recipe's origin matters — a 10 mL difference per cup compounds across multiple ingredients.

5. Ignoring temperature for oils. Coconut oil is solid below 76 °F (24 °C) and liquid above it. Its density changes slightly, and measuring a solid vs. liquid cup yields different gram weights. Always melt coconut oil before measuring if the recipe expects liquid.

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Related Calculators

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Recipe Scaler (multiply or divide servings)

Frequently asked questions

How many grams is 1 cup of all-purpose flour?

1 cup of all-purpose flour weighs approximately 125 grams using the standard spoon-and-level method, according to USDA food composition data. If you scoop the flour directly from the bag, the cup can pack to 150 g or more — a 20% overshot that leads to dense baked goods. For consistent results, always use a kitchen scale.

Why do cups and grams give different results for different ingredients?

A cup measures volume (240 mL in the US), while grams measure mass. Each ingredient has a unique density — how much mass fits into that fixed volume. Granulated sugar (200 g/cup) is nearly twice as heavy as powdered sugar (120 g/cup) for the same cup volume, simply because granulated crystals pack more densely. This is why volume measurements are inherently less precise than weight measurements in baking.

Is 1 cup the same in all countries?

No. A US legal cup = 240 mL, an Australian/Canadian metric cup = 250 mL, and an old imperial UK cup = 284 mL. That's a 6–18% volume difference. If you follow a recipe from Australia without adjusting, each cup of flour you measure will be 12.5 g heavier than the recipe intends. Always check a recipe's country of origin and use the corresponding cup size.

Does it matter if brown sugar is packed or not?

Yes — significantly. A loosely filled cup of light brown sugar weighs roughly 160–170 g, while a firmly packed cup reaches 220 g — a 30% difference. Most US recipes specify 'packed' brown sugar. When converting to grams, use 220 g per packed cup (light brown sugar). If the recipe doesn't specify, packed is the standard North American convention.

How do I convert grams back to cups?

Simply reverse the formula: Cups = Grams ÷ Density_Factor. For example, 250 g of all-purpose flour ÷ 125 g/cup = 2 cups. 300 g of granulated sugar ÷ 200 g/cup = 1.5 cups. This is especially useful when your scale gives you the total weight and you need to communicate the amount in cups to someone else.

Do sifted and unsifted flour weigh the same per cup?

No. Sifting aerates flour, reducing density. Unsifted all-purpose flour spoon-leveled weighs ~125 g/cup; sifted all-purpose flour weighs ~110 g/cup — about 12% less. Cake flour sifted can drop to as low as 100 g/cup. The recipe's phrasing matters: '1 cup sifted flour' means sift then measure, while '1 cup flour, sifted' means measure then sift — these yield different amounts.

Why are oil cup-to-gram conversions important for calorie tracking?

Oils are calorie-dense: olive oil provides approximately 884 kcal per 100 g (USDA). At 216 g per cup, a single cup of olive oil contains roughly 1,910 kcal. Even a 2-tablespoon (1/8 cup) error equals ~27 g of oil and ~239 extra kcal. For anyone tracking macros or calories, converting oils from cups to grams and then to kcal using USDA nutrient data is far more accurate than relying on volume alone.

What is the best technique for measuring flour by cups if I don't have a scale?

Use the spoon-and-level method: (1) fluff the flour in its container with a spoon, (2) spoon flour into the measuring cup until overflowing, (3) level the top with a straight-edge knife. Never shake, tap, or scoop the cup into the bag. This technique consistently produces cups closest to the 125 g/cup standard used by recipe developers and USDA measurement guidelines.