Granulated sugar is not the same directory entry as powdered, packed brown, or superfine sugar. Select it because it matches the recipe, then inspect the particular source reference.
Keep the sugar form explicit
King Arthur’s source convention identifies white granulated cane sugar. Doves Farm supplies a granulated-sugar cup reference without turning it into a reference for caster or superfine sugar.
Preserve any more specific product description in the recipe note. A nearby sugar name does not justify reusing the same mass–volume relationship.
Read the publisher’s cup definition
The Doves Farm reference explicitly uses a 240 mL cup. Its page’s cup label should not be confused with the exact 236.5882365 mL US customary cup used by the tool’s US setting.
The source does not give a detailed filling procedure for this row. Keep the reference approximate and retain the method limitation instead of presenting the conversion as a universal measured density.
Use direct scaling when you have weight
If your original recipe gives a sugar weight, multiply that weight by the serving factor. You can change grams to another mass unit without choosing a sugar density.
On a shopping list, combine only compatible granulated-sugar rows. Keep powdered sugar and packed brown sugar separate so a total does not hide the form the recipe needs.