How the Cups to Grams Converter Works
This calculator lets you convert between grams, cups, and milliliters while accounting for the specific density of each ingredient. It is the ideal tool when following an American recipe that uses cups and you need to measure in grams with a kitchen scale.
Why One Conversion Does Not Fit All
Unlike liquids, where 1 ml roughly equals 1 g (for water), solid ingredients have very different densities. One cup of flour weighs only 125 g, while one cup of sugar reaches 200 g. Using a single conversion factor for all ingredients leads to significant errors in recipes.
Quick Reference Table
Equivalents for 1 cup (240 ml) of the most common ingredients:
- All-purpose flour: 125 g — the ingredient where errors matter most
- Granulated sugar: 200 g — much denser than flour
- Butter: 227 g — nearly twice the weight of flour
- Rice: 185 g — mid-range
- Milk: 245 g — similar density to water
- Oil: 220 g — slightly lighter than water
- Water: 240 g — the base reference
Tips for Accurate Measurements
For precise measurements in baking, a digital kitchen scale with gram accuracy is always preferable. American cups measure volume, not weight, and the result depends on how you fill the cup: sifted flour and packed flour can differ by over 20 grams per cup.
If you use cups, the correct method is to spoon the ingredient into the cup without packing, then level with the back of a knife. This "spoon and level" technique ensures the most consistent measurements.