Precision baking starts with accurate ingredient conversions. Instantly convert cups to grams with our free online baking conversion calculator. Easily convert flour, sugar, butter, milk, and other cooking ingredients from cups and metric cups to grams for perfect baking results every time.
US Legal Cups (240ml)
All-Purpose Flour
| Ingredient | 1 Cup (US) | ½ Cup | ¼ Cup | 1 Tbsp |
|---|
For flour, spoon into cup then level with knife. Don't scoop directly from bag.
Pack firmly into cup until it holds shape when turned out.
Ensure ingredients are at room temp for most accurate volume measurements.
Whether you are following an American recipe with cup measurements or a European recipe with grams, accurate conversion is essential for baking success. Our converter covers the most common baking and cooking ingredients with values sourced from King Arthur Baking, AllRecipes, and USDA FoodData Central.
Home bakers frequently search for specific conversions. Here are the most requested ones: 1 cup flour to grams (120g), 1 cup sugar to grams (200g), 1 cup butter to grams (227g), half cup butter to grams (113.5g), quarter cup sugar to grams (50g), 4 cups flour to grams (480g), 1 cup milk to grams (240g), 1 cup oats to grams (90g), 1 cup honey to grams (340g), and 1 cup rice to grams (185g).
For smaller measurements: 1 tablespoon flour to grams (7.5g), 1 tablespoon sugar to grams (12.5g), 1 tablespoon butter to grams (14.2g), 1 teaspoon salt to grams (6g).
The US Legal Cup is defined as 240 milliliters and is the standard used in all American recipes, cookbooks, and baking blogs. The Metric Cup is 250 milliliters and is used in Australia, New Zealand, Canada, and some European countries. This 10ml difference (about 4%) can significantly affect baking outcomes, especially in recipes with precise chemistry like cakes and pastries. Our converter supports both standards — simply toggle between US Cups and Metric Cups to get accurate gram weights for your recipe's origin. When a recipe says "1 cup" without specifying, it almost always means the 240ml US cup.
Professional bakers and pastry chefs measure ingredients by weight (grams or ounces) rather than volume (cups or tablespoons) for one simple reason: accuracy. A cup of flour can weigh anywhere from 100g to 150g depending on how it is scooped, the humidity in your kitchen, and the brand of flour. That is a 50% variance — enough to ruin a delicate cake or make bread too dense. A digital kitchen scale eliminates this guesswork entirely. If you bake regularly, investing in a $15-$30 scale will improve your results more than any expensive mixer or fancy pan. Our cup-to-gram converter is designed for when you do not have a scale handy or when you are converting old family recipes written in cups.
All gram weights in this converter are cross-referenced against multiple authoritative sources to ensure accuracy. Primary sources include the King Arthur Baking Ingredient Weight Chart (the gold standard for US baking measurements), AllRecipes (America's most-trusted recipe site), USDA FoodData Central (the official US government food database), and Weekend Bakery (European baking authority). Values represent averages for standard commercial brands at room temperature. Your specific brand or local humidity may cause minor variations of ±5-10%. For critical recipes — wedding cakes, commercial baking, or competition entries — always use a calibrated digital kitchen scale.