Cups to Grams Converter

About the Cups to Grams Converter

Converting cups to grams requires knowing the ingredient's density, because different ingredients weigh different amounts per cup. One cup of flour weighs about 125 grams, while one cup of sugar weighs about 200 grams, and one cup of butter weighs about 227 grams.

This converter includes density factors for the most common baking and cooking ingredients. Select your ingredient, enter the number of cups, and get an accurate gram weight. This is far more precise than volume measurements alone.

Professional bakers and international recipes prefer weight measurements (grams) over volume (cups) because weight is consistent regardless of how you scoop or pack the ingredient. Use this converter to turn any American cup-based recipe into gram weights.

When This Page Helps

Volume measurements for dry ingredients are imprecise — a "cup of flour" can vary by 30% depending on how it's scooped. Converting to grams ensures consistent, repeatable results. This matters most in baking where precision affects texture and rise.

How to Use the Inputs

1. Select the ingredient from the dropdown list.
2. Enter the number of cups.
3. The gram equivalent appears in the output panel.
4. Use decimal cups for partial measurements (e.g., 0.5 for half a cup).
5. If your ingredient isn't listed, use the closest match or water as a default.

Example Calculation

Tips & Best Practices

• For flour, use the spoon-and-level method: spoon flour into the cup and level with a knife (125 g/cup). Scooping directly packs more flour (up to 150 g).
• Brown sugar should be firmly packed into the cup for the standard 220 g measurement.
• Liquid ingredients like water and milk are more consistent by volume than dry ingredients.
• Invest in a kitchen scale for best baking results — it costs under $15 and dramatically improves consistency.
• Powdered (confectioners') sugar is lighter than granulated: only 120 g per cup vs. 200 g.

The Problem with Cup Measurements

A cup of flour can weigh anywhere from 120 to 155 grams depending on whether it was spooned, scooped, sifted, or packed. This 30% variation is enough to ruin a delicate cake or pastry. Professional bakers and most international recipes use weight measurements to avoid this inconsistency.

Common Ingredient Densities

Flour is light and airy (125 g/cup), granulated sugar is crystalline and dense (200 g/cup), brown sugar is packed (220 g/cup), and butter is a solid fat (227 g/cup). Cocoa powder is particularly light at 86 g/cup. Each ingredient needs its own conversion factor.

Getting Started with Kitchen Scales

A basic digital kitchen scale costs $10–15 and measures in both grams and ounces. Once you start baking by weight, you will never go back to cups. Many bakers zero (tare) the scale between ingredients, adding directly to the mixing bowl.

Frequently Asked Questions

• How many grams is 1 cup of flour?

  One cup of all-purpose flour weighs approximately 125 grams when measured using the spoon-and-level method. If you scoop the cup directly into the flour bag, it can weigh 140–150 grams due to compaction.

• Why do grams per cup vary by ingredient?

  Different ingredients have different densities. Sugar crystals are denser and heavier per cup than fluffy flour. Butter is a solid fat with yet another density. Volume does not account for these differences, which is why weight is more precise for cooking.

• Is a cup of sugar the same weight as a cup of flour?

  No. One cup of granulated sugar weighs about 200 grams, while one cup of all-purpose flour weighs about 125 grams. Sugar is significantly denser than flour, which is why weight measurements are preferred for precision.

• How do I convert a cup of butter to grams?

  One US cup of butter weighs 227 grams, which is exactly 2 sticks of butter (each stick is 113.5 g or 1/2 cup). A tablespoon of butter is about 14.2 grams.

• Can I use this for liquid ingredients?

  Yes. Water and milk weigh approximately 237 grams per US cup (based on a density close to 1 g/mL and 236.588 mL per cup). Heavier liquids like honey weigh about 340 g per cup.

• Why do professional bakers use grams instead of cups?

  Weight measurements are consistent and repeatable regardless of how you scoop, pack, or sift the ingredient. A cup of flour can vary by 30% depending on technique. Grams eliminate this variability, producing more reliable baking results every time.