How many grams of salt is in a teaspoon?

The amount of salt in a teaspoon depends on the type and granularity of the salt. On average:

Fine table salt: 1 teaspoon = 6 grams

Coarse sea salt or kosher salt: 1 teaspoon = 4–5 grams

Since coarse salts are less dense, they weigh slightly less per teaspoon than fine table salt.