Choose a household size and number of days. This starter estimate counts three meal occasions per person per day and the standard planning baseline of one gallon of water per person per day.
The water baseline and several-day food recommendation come from Ready.gov’s emergency kit guidance. Adjust for climate, health needs, pets and local direction.
Starter estimate
A planning baseline—not a shopping cart.
42 meal occasions to plan
14 gal minimum water baseline
A Worked Example
Take a household of four planning for two weeks. The math: 4 people × 14 days × 3 meals = 168 meals, and 4 × 14 × 1 gallon = 56 gallons of water. Two weeks is the right first goal for most households — long enough to matter in a real disruption, small enough to actually finish. Get 14 days right, in food your family will eat, before pricing 90. And notice the second number: freeze-dried meals, rice, and pasta all need water to become food, so the water figure is not a separate plan — it is half of the food plan.
How to Read Your Result
- Meals are servings. A “serving” printed on a pouch is often smaller than what a hungry adult eats at a sitting, and people in a stressful week eat more, not less. Treat the meal count as a floor and round up.
- The gallon is a floor too. One gallon per person per day covers drinking and the basics in mild weather. Heat, physical work, illness, and cooking all push it higher.
- Days are a ladder, not a leap. A household that can cover 14 days calmly is better prepared than one that panic-bought 90 days of food nobody will touch. Climb: 3 days, then 14, then a month.
Mistakes That Leave Pantries Short
- Storing food that needs water — and no water. Freeze-dried meals, rice, beans, and pasta are not food until water is added. Food and water get planned together, which is why this planner counts both.
- Forgetting the pets. Dogs and cats eat and drink every day of an emergency too, and pet food is almost never in the pantry math. Add their food to the shelf and their share to the water.
- Counting calories your family will not eat. A shelf of disliked food gets skipped, traded, or wasted. Store what you already cook with and rotate it — the working pantry beats the exotic bucket.
- No way to cook any of it. If the power and gas are both out, raw ingredients are not meals. A camp stove and fuel belong in the same plan; the power side of the outage is covered by the calculator linked below.
Questions People Ask
How much water should I store per person?
One gallon per day is the standard planning floor — drinking, plus a little for hygiene and cooking. Two weeks for a family of four works out to 56 gallons. Store more if you can; water is the one supply you cannot substitute.
How many meals is a month of food storage?
Ninety per person: 3 meals × 30 days. A family of four needs 360. Run your own household through the planner above — the number usually surprises people in both directions.
Do freeze-dried meals count toward the total?
Yes — a serving is a serving. Just remember that each one also needs roughly a cup of water to rehydrate, and that water belongs in your water number, not as an afterthought.
Should children count as full people?
For water, yes. For food, small children eat roughly half portions, so counting a child as half an adult for meals is a common planning rule. When in doubt, count everyone fully — the surplus keeps, and appetites grow.
Turn Your Numbers Into a Plan
Your estimate is the shopping list — these are the guides that turn it into food and water on the shelf:
- Water Filters Compared: Berkey vs AquaTru vs LifeStraw vs ZeroWater — stored water runs out; a filter that works without power stretches your water plan from days to indefinite
- Starter Kit Reviews — the three ready-made food kits we scored, from a 72-hour starter to a bulk pail, with the true cost per serving of each
- Home Freeze Dryers Compared: Harvest Right vs Blue Alpine vs Stay Fresh — for growing past kits and preserving your own food at home
- Preserve the Pantry — how the shelf comes together: quantities, rotation, and storage that keep food from going to waste
- Preserve the Water — storage containers, treatment, and planning beyond the one-gallon-a-day baseline
- Power Station Size Calculator — the outage half of the plan: what it takes to keep the fridge cold, the lights on, and medical devices running
- All Our Free Tools — every calculator in one place
New to all of this? Start with how to build the right shelf — and see how we rate everything we recommend.