Emergency Food for a Family of 3: The Two-Week Numbers
June 18, 2026 · 3min read · Reviewed against FEMA & CDC guidance
A family of three lives between the internet's two favorite households: every emergency list is written for a family of four, every minimalist guide for one. So threes either overbuy by a third or quietly under-stock. Neither is necessary, because the math scales exactly.
A family of three needs about 84,000 calories of food and 42 gallons of water for the two-week supply FEMA recommends. Here is that number as a real shopping list, with the kid-sized adjustments that actually matter.
The family-of-3 math
Planning figures, per person: 2,000 calories per day (FEMA's baseline) and 1 gallon of water per day (CDC guidance). For three people:
| Duration | Calories | Water |
|---|---|---|
| 3 days | 18,000 | 9 gallons |
| 2 weeks | 84,000 | 42 gallons |
| 1 month | 180,000 | 90 gallons |
Kid adjustments are simpler than people expect. A toddler eats well under the 2,000-calorie figure and a teenage boy can eat 2,800 or more, so the honest move is to treat 2,000 as the average and let the child's age tip you slightly under or over. Water stays a full gallon per person regardless of age, and pregnancy or nursing adds a half gallon per day.
The 84,000-calorie shopping list
Three-quarters of the family of 4 mix, organized the same way, storable without refrigeration:
Grains and starches (~34,000 cal): 8 lbs rice, 4 lbs pasta, 4 lbs oats, 3 lbs flour or baking mix, crackers and tortillas.
Proteins (~19,000 cal): 9 cans of beans, 6 cans of tuna or chicken, 3 jars of peanut butter, canned chili or stew, nuts.
Fruits, vegetables, soups (~13,000 cal): 15 cans of vegetables and fruit, 7 cans of soup, dried fruit, shelf-stable milk and juice.
Fats, sugars, comfort (~18,000 cal): cooking oil, honey or sugar, and the comfort layer: hot chocolate, cookies, the cereal your kid actually eats. With one child, familiar food is not a luxury; it is the difference between a hard week and a manageable one.
With a baby or toddler in the three, formula and jar food are their own supply chain with their own math, covered in our baby preparedness guide.
Water for three, without a tanker
42 gallons splits into a manageable mix: ten to twelve cases of bottled water for drinking (stackable under beds and closet floors), plus a few 5 to 7 gallon containers for cooking and washing. Rotate tap-filled containers every 6 months. The per-container comparison, including which ones a normal adult can actually lift, is in our water storage guide.
Build it in five grocery trips
No single $200 run required:
- Trip 1: the water plan plus a manual can opener.
- Trips 2 to 5: add $20 to $30 of list items to each normal shop.
- Ongoing: store what you eat, eat what you store. First in, first out, and the supply never goes stale.
That cadence also spreads the spend across a month of budgets, which is how supplies actually get built in real households.
Three people, one honest number
The list gets your shelves full this month. The harder question arrives in six: after school lunches borrowed the fruit cups, a stomach bug ran through the soup, and the toddler became a kid who eats double, how many days would the three of you actually last right now?
That is the number Provision Planner keeps live. Scan your pantry in, set your household to three, and it recalculates your real coverage every time something is added or eaten, flags expirations, and suggests what to buy next. The family of three finally gets math sized for the family of three, updated daily.
Frequently asked questions
- How much emergency food does a family of 3 need for 2 weeks?
- About 84,000 calories, based on 2,000 calories per person per day for 14 days, plus 42 gallons of water. In groceries that's roughly a single loaded cart of rice, beans, canned proteins, peanut butter, oats, and cooking oil.
- How much water does a family of 3 need for emergencies?
- 42 gallons for two weeks, using the standard 1 gallon per person per day. Stage it in 5-gallon jugs or stackable bricks; that's about eight to nine containers.
- How do you build a family-of-3 food supply on a budget?
- Spread it across about five normal grocery trips, buying the highest-calorie staples first (rice, beans, oats, canned goods). Layering it over a few weeks keeps any single trip affordable while quickly reaching the 84,000-calorie target.
You did the reading. Now get your number.
Provision Planner does this article's math for your real household, automatically, and keeps it current as supplies come and go.