Tablespoons are a measurement of volume and grams are a measurement of weight, so it is not possible to directly convert grams to tablespoons. To convert grams to tablespoons, it's necessary to know the density of the material being measured. The density of water is about 1 gram per milliliter, so 17 grams of water is equal to 17 milliliters. Seventeen milliliters of water equals 1 tablespoon and 1/2 teaspoon.

The equation for density is mass divided by volume. To find the volume of an amount of a material, divide the material's mass by its density. The mass and density must both be either in metric or imperial measurements. For example, the approximate density of sugar is 1.2 grams per milliliter. 17 grams of sugar / 1.2 grams per milliliter = 14.17 milliliters.

Then, the result must be converted into imperial measurements. One tablespoon is about equal to 15 milliliters. Therefore, to convert milliliters to tablespoons, divide the number of milliliters by 15. 14.17 milliliters / 15 = 0.95 tablespoons. The result is that 17 grams of sugar equals 0.95 tablespoons of sugar. This value is so close to one that the result can be rounded off to 1 tablespoon of sugar.