Ask ten sources how much food to keep on hand and you'll get ten answers. The Red Cross says three days. Your neighbor who lived through a hurricane says two weeks, minimum. Somewhere online there's a spreadsheet arguing for a year of freeze-dried buckets. No wonder most people either overbuy in a panic or never start at all.
The good news is that the actual math is simple, and you can size a supply to your own household in about five minutes. Here's how to think about it.
Why the recommendations disagree
They're answering different questions. A three-day supply is meant to get you through a storm that knocks out power and closes the roads for a weekend. That's the baseline Ready.gov and the Red Cross start with, and for a lot of people it's enough.
But emergency managers who have actually worked disasters tend to push further. Supply chains hiccup. A regional event can keep stores closed or empty for longer than a weekend, and help doesn't always arrive on schedule. That's why many state agencies now suggest building toward two weeks, then a month, as your budget and space allow. Think of it as a ladder rather than a single number.
The tiers, per person
You don't have to jump to the top rung. Pick the level that matches where you live and what you can afford right now, and add to it later.
| Level | Good for |
|---|---|
| 3 days | The starting point. Short outages, storms, being told to shelter in place for a weekend. |
| 2 weeks | The sweet spot most managers recommend. Covers bigger regional events and slow-to-return power or water. |
| 1 month | A solid goal for anyone in hurricane, wildfire, or winter-storm country. |
| 3+ months | For serious preppers, rural households far from stores, or real peace of mind. |
The simple calorie math
Every plan comes down to one calculation. You're not trying to eat well, you're trying to keep everyone fed and functioning, so plan around calories rather than meals.
People in your household × 2,000 calories × number of days = total calories to store
Say you're a family of four aiming for two weeks. That's 4 × 2,000 × 14, or about 112,000 calories. It sounds like a lot written out. In practice a case of canned chili, a few bags of rice, some peanut butter, and a stack of shelf-stable meals gets you most of the way there without much effort.
A couple of adjustments are worth making. Kids under about eight eat less, so you can round them down. Active adults, teenagers, anyone pregnant or nursing, and cold-weather situations all push the number up, so lean toward 2,500 per person if that describes your house. When in doubt, store more, not less. Extra food never goes to waste if you rotate it into normal meals.
What to actually stock
The best emergency food is boring: shelf-stable, no refrigeration, little or no cooking, and something your family will genuinely eat. Fancy is not the goal. Familiar is.
- Canned protein. Chili, beans, tuna, chicken, stew. Already cooked, eat it cold if you have to.
- Carbs that keep. Rice, pasta, oats, crackers. Cheap calories that last for years.
- Peanut butter and nuts. Dense calories and fat, no prep, kids will actually eat them.
- Canned fruit and vegetables. Vitamins and variety, and the liquid counts toward hydration.
- Comfort items.Coffee, cocoa, hard candy, a jar of something you like. Morale matters more than people expect when the power's been out for three days.
Round it out with a manual can opener, and don't forget anything your household actually depends on: baby formula, pet food, and a few days of any prescription that can't lapse.
Don't forget the water
Food gets all the attention, but water is the part that will stop you first. The standard is one gallon per person per day, half for drinking and half for cooking and cleaning. For that family of four over two weeks, that's roughly 56 gallons. Store what you can, and know where you'd refill or purify beyond that.
The mistakes that trip people up
- Buying food nobody likes.An emergency is a bad time to discover your kids won't touch lentil soup. Stock what you already eat.
- Forgetting the can opener.It's the most common gap, and a wall of cans is useless without one.
- Set it and forget it.A stockpile isn't a monument. Cans and pouches expire, so you have to rotate through them.
- Skipping water. You can go weeks without food. Water is measured in days.
The part nobody tells you: knowing what you already have
Here's the catch with any supply you build over months. The moment it exists, you have to keep track of it. What's in the garage bins? Which cans expire this year? Do you actually have two weeks of food right now, or does it just feel that way because the shelf looks full?
Most stockpiles quietly rot from the back. Things get pushed behind other things, dates slip past, and you end up rebuying what you already own. That's the real work of preparedness, and it's less about the shopping trip than about the tracking afterward.
A simple home inventory turns that guesswork into a number. Log what you store, note the dates, and let something remind you what to use before it expires. You get to rotate the oldest items into everyday meals instead of throwing them out, and you can answer the only question that really matters in an emergency: how many days of food do we have, right now? That's exactly what StockWell is built to do, whether you are building a year supply a little at a time or a deeper preparedness stock. See the CTA below.
The figures here are general planning estimates and vary with age, health, activity, and climate. They aren't medical or safety guidance. For official preparedness recommendations, check Ready.gov and your local emergency management agency, and see our Terms for more.