Substitutions

Stevia vs. sugar

one 1-ounce (28 g.) bottle of Stevia extract powder
is equivalent to nearly twenty pounds of sugar. (From Stevia Recipes
http://www.steviva.com/stevia_recipes.html )

Based on the above information, these measurements should be about
right:
1 oz. Stevia = 40 cups Sugar
1/2 tsp. Stevia = 3 cups Sugar
1/4 tsp. Stevia = 1 1/2 cups Sugar
1/8 tsp. Stevia = 3/4 cup Sugar

According to Sugar Substitute Equivalencies
http://members.aol.com/lowcarbs/lowcarblist/equiv.htm
1/8 tsp. Stevia Extract Powder (White) = 1/2 cup Granulated Sugar
1/4 tsp. Stevia Extract Powder (White) = 1 cup Granulated Sugar

According to Stevia Herb Page http://www.seedman.com/stevia.html
1/2 to 1 tsp. Stevia Powder Extract (White) = 1 cup Sugar
A 2 fl. oz. bottle of Pure Stevia Extract = 20 cups Sugar
2 to 3 drops of liquid Stevia extract = 2 tsp. Sugar

Some sources say that Stevia is 400 times sweeter than sugar.

Stevia comes in many forms: (The sweetness varies with each form.)
Liquid concentrate, easy to measure in drops (slight licorice flavor)
White powdered extract, non-licorice flavor  (the form primarily used in
Japan)
Blended with a non-sweet filler called maltodextrin.
Fresh Stevia leaves - extremely sweet taste with a strong licorice
flavor
Dried leaf, finely powdered (licorice flavor)