There are two reasons to use a precise scale when baking: accuracy and efficiency.
Using volumetric cup measures is extremely inaccurate for compressible foods like flour. Depending on your scooping or sifting method, a cup of flour can weight anywhere between four and six ounces. That’s a difference of 50 percent! With a scale, on the other hand, you know that your cup of flour is exactly the same time after time, giving you better, more consistent results. On Serious Eats, our standard cup conversion is five ounces of all-purpose flour per cup.
A scale will also save you clean up! Rather than using different cups to measure out every ingredient, just place a bowl on your scale, and measure directly into the work bowl as you go. For instance, when making a pizza dough, I know I can add 1 kilogram of flour, 700 grams of water, 25 grams of salt, and 10 grams of yeast and have a dough that will behave exactly as I expect it to, all with only a single bowl to clean.
Originally Posted on Seriouseats
Highly accurate scales are now available at Hospitalizoo!