Good source of fiber (Good source of fiber = 1-1/2 tsp of Splenda). New. Same sweet taste with 2 g of fiber per teaspoon. With 2 g of fiber, each teaspoon completely dissolves in liquid ad provides the great Splenda taste and zero calorie sweetness. Add to your favorite beverages and discover how good fiber can taste! Conversion chart: Sugar (1 tsp)- Splenda Fiber (3/8 tsp). Sugar (2 tsp)- Splenda Fiber (3/4 tsp). Sugar (1 tbsp)- Splenda Fiber (3/8 tbsp). Sugar (2 tbsp)- Splenda Fiber (3/4 tbsp). Sugar (1 cup)- Splenda Fiber (6 tbsp). Free food = 3 servings. Suitable for people with diabetes. splenda.com. Facebook.com/Spenda.