Salted butter typically contains about ¼ teaspoon of salt or about 575 to 600 milligrams of sodium per half-cup stick. That's about 75 milligrams of sodium per tablespoon.

This can vary across brands; many salted butters have ¼ teaspoon of salt per stick, but others can have double that. Generally, it will be in the ¼ to ½ teaspoon range.

While salted butter is great as a spread, unsalted butter is ideal for baking or cooking projects requiring precision of ingredients, as it lets you add salt separately to taste.

Plus, the extra moisture in salted butter can negatively impact the texture of baked goods requiring gluten development. Luckily, you can swap one butter for the other in a pinch.

Assuming your salted butter stick has ¼ teaspoon of salt, reduce the salt in the recipe by ¼ teaspoon. To make unsalted butter spreadable, mix it with ¼ teaspoon salt per stick.