Nonnutritive sugar substitutes. Common brand names are Splenda, Sweet N'Low, Equal, and Nutrasweet.
Splenda is available in several varieties: Splenda powder, Splenda granular, Splenda brown sugar blend, and Splenda sugar blend for baking (a blend of Splenda sweetener and sugar).
1 cup Splenda Granular = 1 cup granulated sugar
1/2 cup Splenda Sugar Blend = 1 cup granulated sugar
1/2 cup Splenda Sugar Blend = 1 cup brown sugar