You can, but it's really little different to any sea salt - as a mineral, all salt is parve (or pareve) - meaning neutral, the kashrut laws which designate which foods are and are not kosher do not apply unless non-kosher ingredients (such as some anti-caking agents) have been added.
Outside of the USA, kosher salt is more commonly known as koshering salt, a name that is more accurate since it reflects the salt's use in "koshering" meat (which is covered in salt to soak up any blood - blood is not kosher - left after shechita, the ritual slaughter carried out in strict accordance with Jewish law) so that it can be eaten by Jews rather than some presumed property of the salt.
No kosher salt available
By default, all salt is kosher unless something is added to it to render it not kosher (usually flavourings). If you're just following a recipe that calls for coarse kosher salt, any coarse salt will do, or you could just use table salt.
MOST supermarkets have it. It's in the baking section.
Kosher salt
Kosher salt is basically regular salt because salt is kosher. Salt isn't good for you if you eat too much.Answer:Chemically speaking, table salt and coarse (kosher) salt are the same.
Kosher salt can be purchased in grocery stores
All salt is kosher. "Kosher salt" is a particular grade of salt, with coarse crystals, that is used for making meat kosher, and is also useful in cooking. It's no more kosher than any other kind of salt.
All salt is kosher unless something is added to it that isn't kosher. Kosher salt is just a large grained salt. Use the same amount of any salt.
Most salt is kosher by default unless additives such as flavourings are added, at that point the salt would have to be certified kosher. 'Kosher salt' refers to a large grain salt that is used during the process of kashering meat. Iodized salt is kosher.
When substituting sea salt for kosher salt in a recipe, it is recommended to use about half the amount of sea salt as the recipe calls for kosher salt.
Yes, you can substitute table salt for kosher salt in a recipe, but you will need to use less table salt because it is more concentrated than kosher salt.
Table salt and kosher salt are both 39% sodium by weight.