In just one tablespoon of mayonnaise there is about 5.1 grams of carbohydrates. In low-fat mayonnaise there is about 3.5 grams of carbohydrates which is significantly less. If you are on a diet because you are attempting to lose weight, it might be able to get the low-fat variety of mayonnaise so you can still enjoy the taste while not consuming quite as many carbs.

In light mayonnaise you will find that there is only 1.23 carbs in it, so if you are going to eat this condiment with a sandwich or put it in as an ingredient for a certain recipe that is exactly what you will want to use.