The chart below is based on 3 servings per person per day of Legacy Premium which has an average of 371 calories per serving.  Look for the number of people you need to feed and then look at the amount of time you are trying to prepare for. Remember to plan for 1 gallon, or 4 litres of water per person per day for drinking, cooking and cleaning.

Note: Augason Farms and ReadyWise have differing calories per serving and will not automatically work with the matrix. Please refer to their product pages for calories per serving to determine how many servings you will require.