How much Sodium in a Grain of salt?

There is around about 2,300 mg of sodium in one teaspoon of salt.

Table salt and kosher salt are both 39% sodium by weight.

If your pinch of salt is 1/16 tsp, then 150 mg of sodium. If your pinch of salt is 1/8, then 300 mg.

Kosher salt is identical to table salt in regard to sodium content. One teaspoon of salt is 2325 mg of sodium.