Found this for you as a starting point:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Having babbled enough now, here are the general substitution rules for sweeteners, but remember, most people consider these emergency substitutions, not daily rules to live by:
In spite of their difference in weight, you can substitute brown sugar for granulated white on a 1 to 1 basis, and the most significant difference will be taste.
Substitute white sugar for brown sugar on a 1 to 1 basis, but add 4 tablespoons of molasses per cup, and decrease the total amount of liquid in the recipe by 3 tablespoons.
To use honey in place of sugar, use 7/8 cup for every cup of sugar, and reduce the liquid in the recipe by 3 tablespoons.
To use sugar in place of honey, use 1-1/4 cups of sugar plus 1/4 cup more liquid.
To use maple syrup in place of sugar in cooking, use 3/4 cup for every 1 cup of sugar.
To use maple syrup in place of a cup of sugar in baking, use 3/4 cup, but decrease the total amount of liquid in the recipe by about 3 tablespoons for each cup of syrup you use.
To use sugar in place of a cup of maple syrup, use 1-1/4 cups of sugar plus 1/4 cup more liquid.
just use the inverse to substitute maple syrup for sugar
Finally, granulated sugar has 46 calories per tablespoon, brown sugar has 50, maple syrup has 53, and honey tops them all with 64. </div></BLOCKQUOTE>
http://www.ochef.com/91.htm