Do you have enough food for 3 days, a week, a month? Here are the bare minimums you need in a disaster or emergency.
Water – 1Adult for 1 Day
1-3 liters or 68 ounces (about a half gallon)
This could be more depending on the weather, your weight etc. Here’s a good calculator
If you’re doing nothing, as in laying in bed your body can consume about 1000-3000 calories a day depending on weight. So assuming you will be doing some activity you would need about 2000 up to 5000 (sometimes more) of healthy calories to maintain your weight. Basically:
130 lbs – 3000 calories
150 lbs – 3200 calories
180 lbs – 3500 calories
200 lbs – 3650 calories
220 lbs – 3800 calories
Here’s a calculator that will pick your daily caloric intake based on age, height, weight and exercise frequency.