It even gets more complicated, but probably not significantly, by anti-caking and other additives put in salt. For example, non-iodized Morton table salt contains calcium silicate while Morton coarse Kosher salt contains Yellow Prussiate of Soda. Morton's iodized salt contains dextrose and potassium of iodine in addition to calcium silicate.
There are conversion charts online to help sort this all out.
Jim - Another transplanted Texan
Former KCBS CBJ
Large and Medium Big Green Eggs , Black 18.5" WSM, Blue Weber Performer - Stainless, Green Weber OTG Kettle , Brinkmann SnP Pro, and a Stainless UDS. One retired Portable Kitchen grill.
Red Thermapen, Maverick ET-732, EdgePro Apex Sharpener.
Avatar is the original 1951 Weber Kettle