A chef instructor taught me how to substitute one for the other.

Here’s what I found out.

The main kosher salt brands sold in the United States like Diamond Crystal and Morton are not iodized.

Box of kosher salt and a container of table salt on a color block background

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Table salt often has anti-caking agents such as tricalcium phosphate and stabilizers such as dextrose added.

The additives in kosher salt vary by brand.

For example,Diamond Crystalhas no additives, whileMorton Kosher Salthas the anti-caking agent yellow prussiate of soda.

Someone adding salt to a pot of boiling water

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The difference in size and volume is perhaps the most important distinction between the two types of salt.

Kosher salt is also great for rimming cocktail glasses and instead of flaky sea salt as a garnish.

For exampleMorton kosher salt is saltier by volume than Diamond Crystal.