Or, you could put a tablespoon or teaspoon of whatever you are trying to weigh on the scale and then do the arithmetic.My point is that teaspoons and tablespoons and fractions thereof are measures of volume while a scale measures weight. A set volume of different ingredients will have different weights. e.g. a tablespoon of salt will weigh more than a tablespoon of oregano or flour etc.
In order for a scale to be useful, you'd have to have a chart of volumes to weights of all common ingredients.