There seems to be quite a lot of confusion about Splenda and the difference between Splenda and Sucralose and calories involved and why people use such long sentences and think it's OK because they use "and". I don't really care about the last part, it just makes a person look like they're in a hurry or ignorant of sentence structure or they don't care or they're trying to make a point or... I'm falling into the same trap with "or".
Moving on.
I'm not going to get into all the hype about it being poisonous or what have you. I don't eat it because I think it tastes horrible, not because of it's supposed poisonous characteristics. BTW the process for making sucralose was discovered in 1976 and there have been dozens of studies showing it to be safe.
Splenda is made using Sucralose and fillers. Sucralose as you likely know, is an artificial sweetener made using a process that starts with sugar. The process does something about removing some hydrogen-oxygen groups and replacing them with chlorine yadda yadda, blah blah, chemistry. I'm not a chemist and I don't play one on TV.
Anywho, since sucralose is about 600x sweeter than sugar, it has to be mixed with a "filler" for volume. The fillers they use are dextrose and maltodextrin.
For those of you that don't know, both dextrose and maltodextrin are used by bodybuilders in their PWO (Post Work Out) shakes to provide an insulin spike. Without getting too technical, insulin is a hormone that shuttles nutrients into cells. It's a storage hormone. When you take it after a workout with protein the idea is you jump start the muscle growth and recovery phase from the workout.
OK, so, Splenda has sugar "...but...but they said it's NO CALORIE!!". Technically, by law, they're right. Notice "by law" and "technically". As it turns out, when labelling the nutrient information of a product, if the product contains less than 1 gram of some item, you don't have to include it. Which is pretty handy when you're serving size is 1 gram and you have more than 1 substance in there.
Let's use the
USDA Nutrient database to prove a point.
- Search "splenda"
- Choose the one search result. Just in case they add something "Sweeteners, tabletop, sucralose, SPLENDA packets"
- Submit
- Check mark both amounts listed. 1, 100gram serving and 1 single packet serving.
- Submit
Now you get a table with some values...lots of values. Some, or rather most, of it is not interesting as it has a value of 0. While zero is certainly very interesting in it's own right, for this discussion, it is naught...get it? funny? no??? oh come on!!
The reason for selecting 1g and 100g is for comparison. I know you can take the 1g stuff and multiply by 100, but this makes it nice.
First kcal: A calorie is the amount of energy required to raise the temperature of one gram of water by 1 °C.
Food Calories are measured in kilocalories. Note the capital C in Calorie denoting a kilocalorie. I'll just use Calorie or kcal or Cal. There's also a fairly good chance I'll forget to CAPITALIZE the C. So if you see calorie, please use your brain realize it's should be capitalized.
OK, now that THAT is out of the way.

(1) Sucralose subtracted out.
(2) Sucralose not included.
100g of Splenda has about 90g of Carbs. 80g from Sugar, 10g from starch.
Remember the Dextrose and Maltodextrin mentioned earlier? This is where they come into the picture.
Dextrose = Sugar
Maltodextrin = Starch
So, we have again roughly, 80g of Dextrose and 10g of Maltodextrin.
Both are very rapidly absorbed into the bloodstream and have a dramatic effect on insulin levels...Dextrose is absorbed directly as glucose. Maltodextrin is a chain of glucose sugars, and is similarly absorbed after amylase works it's magic. Amylase is an enzyme that breaks the very weak hydrogen bonds between the links in the chain. Again, NOT a chemist...
So, don't eat 100g of the stuff right? Well DUH.
Ok, so 1g of it has 3 Calories. As it turns out, 1g of sugar has...according to the USDA nutrient database...3.87 Calories.
Wow, you just saved 0.87 Calories per gram WOO HOO!!!! (Typing WooHoo likely burned 4.0 Calories, I have no data to backup that statement. I really have no idea how many calories are burned typing. I'm sure someone knows...JFGI if you want to know. I couldn't care less.)
Not so fast there sparky, it's not that bad...really.
Since Splenda is sweeter, you don't have to use as much. So if you might use 4 packets of sugar, you might find 2 packets of Splenda suffice.
4 (2.8g/packet) packets of sugar has about 43Calories.
2 (1g/packet) packets of Splenda, about 7.
That's a savings of...let's see, ought into ought is...carry the one, divide by two, add three...36!!
So substituting Splenda for sugar will certainly save you some calories, but only if used in moderation and not on 1-to-1 ratio.