Question: 1 can black beans to dry?
Answer: So for a recipe that calls for one 15-ounce can of beans, you can cook 3/4 cup (4.5 ounces) of the dried version and be in the ballpark. Conversely, if a recipe calls for 1 cup of dried beans, you'll need to buy two 15-ounce cans to have the 2+ cups worth of cooked beans the recipe will eventually yield.