For tomato sauce: ½ cup tomato powder and 1 cup water
For tomato paste: ½ cup tomato powder to ½ cup water
For tomato juice: ½ cup tomato powder to 5 cups water
There is no salt in the tomato powder but in most prepared tomato products there is a lot, so make sure to taste and adjust your recipe accordingly.
One #10 can tomato powder makes 110.25 cups of tomato sauce (more if you like it thinner) equal to 63 15oz cans of store bought sauce. Think of the space savings!