Using this Harris Benedict calculator will tell you your Basal metabolic rate (BMR) which is equivalent to the amount of energy (in the form of calories) that the body needs to function while resting for 24 hours.
You can use this calculator to figure out how many days your food storage will last you. remember this is how many calories you need a day while resting which means you will need more calories the more active you are.
Using the amount of calories you would burn in 24 hours and the calories in your food storage will tell you how long it will last.
There are many reasons why someone would need survival food. If a person decided to go on a camping trip and needed to take food along to sustain themselves, survival foods would be a good suggestion because they have value and will guarantee that the person has the correct nutrition in a days’ time. Survival foods will also be something to consider should the SHTF. There will be no electricity or lights so cooking will be a challenge. People that prepare early will stand a better chance at surviving than the ones that do not prepare.