Salt equivalence

From All About Salt - The Virtual Weber Bullet.

Salt Equivalent Measures

Table salt and kosher salt do not have the same saltiness in a flavor brine when measured by volume, but they do when measured by weight.

Table salt weighs about 10 ounces per cup, while kosher salt weighs 5-8 ounces per cup, depending on the brand. If using kosher salt in a brine, you must use more than a cup to achieve the same salt flavor you would get from a cup of table salt.

The chart below shows equivalent amounts of table salt and the two most popular brands of kosher salt.

Table Salt	1 cup
Morton Kosher Salt	1-1/2 cups
Diamond Crystal Kosher Salt	2 cups

Morton Kosher Salt weighs about 7.7 ounces per cup, making it three-fourths as strong as table salt. Diamond Crystal Kosher Salt weighs about 5 ounces per cup, making it half as strong as table salt.
What if you're using something other than Morton Kosher or Diamond Crystal Kosher salt? Regardless of the type of salt - sea salt, canning and pickling salt, or any other brand of kosher salt - just measure 10 ounces of it on a kitchen scale, and you will have the equivalent of 1 cup of table salt.

Notes:

1 cup = 16 Tablespoons
1 oz = 32 grams
10 oz =320 grams

Grams | Table salt  | Morton Kosher | Diamond Crystal
20    | 1 T         | 1 1/3 T = 4t  | 2 T
15    | 3/4 T=2 1/4t| 1T            | 1 1/2 T
10    | 1/2 T=1 1/2t| 2/3 T = 2t    | 1 T


Recipes that don't specify a specific brand of kosher salt tend to use the Diamond Crystal Kosher volume measurements.

Feb 1 2013 ETA:  I just noticed the amounts in the table from the Virtual Bullet for Morton Kosher don't match the results from their weighing.  It should be 1-1/3 cup, not 1-1/2 cup if you go by their weight.