A 72-hour food kit for a family of four needs about 24,000 calories: 8,000 a day for three days. Four of My Patriot Supply's 72-hour packs hold about 25,280 calories, which covers that target. A pantry built from no-cook items can reach the same total for less.
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What "72 hours" means for a household of four
Seventy-two hours is three days. The number is common in preparedness writing, but the federal guidance is looser than that: Ready.gov's food page asks households to keep "at least a several-day supply" of non-perishable food and does not name a number of hours. Read 72 hours as a sensible minimum for planning, not as an official figure.
A 72-hour supply is the smallest of the usual planning tiers. It suits short interruptions: a winter storm that closes roads, a power outage that lasts a few days, a week when you cannot get to a store. For longer stretches, see the how much food a family of four needs guide, which works the same arithmetic out to a month.
The calorie math, step by step
The guide uses 2,000 calories per person per day. That is the figure FDA gives as a general reference for nutrition advice, and it is the figure My Patriot Supply says its kits average ("2,000+ calories per day").
- One person, one day: 2,000 calories.
- Four people, one day: 4 x 2,000 = 8,000 calories.
- Four people, three days: 3 x 8,000 = 24,000 calories.
- One person, three days: 3 x 2,000 = 6,000 calories.
Needs vary. FDA says calorie needs can be higher or lower with age, sex, height, weight and activity, and the Dietary Guidelines table lists teenage boys at up to 3,200 calories a day when very active. A family with two teenagers should plan above 24,000. The nutrition note covers infants, pregnancy and medical diets.
What the My Patriot Supply 72-hour pack covers
The 72-Hour Food Kit Sample Pack is priced at $34.99 on the company's page (read 2026-10-14). The company lists it as one person for 72 hours, with 20 servings and 6,320 calories. It needs 3.57 gallons of water to prepare everything. My Patriot Supply states its food lasts up to 25 years when stored properly.
The key detail is that it is a one-person kit. Here is the conversion:
| Packs | People it covers for 72 hours | Calories | Family-of-four days at 8,000/day |
|---|---|---|---|
| 1 pack | 1 | 6,320 | 0.8 day |
| 2 packs | 2 | 12,640 | 1.6 days |
| 4 packs | 4 | 25,280 | about 3.2 days |
One pack alone is 6,320 / 8,000 = 0.8 of a day for four. To cover four people for three days you need four packs (4 x $34.99), which also means 4 x 3.57 = 14.28 gallons of water to prepare the food. That water is separate from drinking water.
For comparison, Mountain House lists a Just in Case 3-Day Emergency Food Supply at $99.99 for one person and three days, with 18 servings and "approximately 1,706 calories per day" (company page, read 2026-10-14). Three days at 1,706 is 5,118 calories, so the two products size a "72-hour" kit a little differently. Check calories per day, not the day count on the label, before you compare. The survival food kit buying guide lists the other points to check.
The pantry route: no-cook items from Ready.gov's list
You do not need a branded kit to hold 24,000 calories. Ready.gov's food page names items that need no refrigeration, cooking, water or special preparation: canned meats, fruits and vegetables, protein or fruit bars, dry cereal, peanut butter, dried fruit, canned juices, shelf-stable milk and comfort foods. It also reminds households to include a manual can opener and eating utensils.
A practical method is to count meals rather than calories on the shelf:
- 4 people x 3 meals a day x 3 days = 36 meals. (Three meals a day is a planning assumption.)
- Add snacks on top, because children often eat more often than three times a day.
- Check the calories printed on each label and add them up until you reach 24,000.
Label reading is the part that takes time. A can of vegetables may carry only a few hundred calories in total, so a 72-hour pantry leans on higher-calorie items such as peanut butter, cereal and bars. The emergency food list for a family of four turns this into a checklist with quantities.
Water for three days
Ready.gov's water page recommends at least one gallon per person per day for drinking and sanitation. For four people over three days that is 4 x 3 = 12 gallons. Add the preparation water if your food is freeze-dried (14.28 gallons for four of the packs above). The full numbers, storage and purification steps are in the emergency water guide.
How a 72-hour kit differs from a 1-week supply
A week for four is 7 x 8,000 = 56,000 calories, more than twice the 72-hour target. My Patriot Supply's 4-Week kit ($277.95) holds 56,460 calories for one person, which works out to about 7.1 family-of-four days at 8,000 a day. The company says it feeds a family of four for 1 week. Its Family of 4 Starter Pack (1 Week Supply) is $499.99 (regular $576.51) and includes that 4-week kit plus survival straws, a solar power bank, a folding stove, Canned Heat+ and waterproof matches.
If you are starting from nothing, many households build the 72-hour tier first and extend it. The 30-day plan shows the next step up, and our overview of an emergency food supply for family of four shows every tier on one page. Prices are as read from the company's pages on 2026-10-14 and can change.
Who a 72-hour kit fits, and who should plan more
- Fits: a first purchase, a small budget, a household that already stocks groceries and wants a grab-and-go box, or a car or workplace kit.
- May not be enough: families in areas with long road closures or extended outages, households with teenagers, or anyone who needs special diets. In those cases plan for a week or more.
See the Family of 4 Starter Pack, a one-week bundle
FAQ
How many calories does a family of four need for 72 hours?
About 24,000 calories, from 4 people x 2,000 calories x 3 days. Individual needs vary by age and activity, so a household with teenagers should plan above that.
Is one 72-hour kit enough for a family of four?
No. The My Patriot Supply 72-hour pack is listed for one person and holds 6,320 calories, or 0.8 of a family-of-four day. Four packs are needed for three days.
Does Ready.gov say to store 72 hours of food?
Ready.gov asks for "at least a several-day supply" of non-perishable food and does not state a number of hours or days on the pages read for this guide.
How much water does a 72-hour kit need?
Ready.gov's baseline is one gallon per person per day, so 12 gallons for four people over three days. Freeze-dried food needs more water on top of that to prepare.
Sources
- Ready.gov, Build a Kit, read 2026-10-14
- Ready.gov, Food, read 2026-10-14
- Ready.gov, Water, read 2026-10-14
- FDA, Calories on the Nutrition Facts label, read 2026-10-14
- Dietary Guidelines for Americans 2020-2025, Appendix 2, read 2026-10-14
- My Patriot Supply, 72-Hour Food Kit Sample Pack, read 2026-10-14
- My Patriot Supply, Family of 4 Starter Pack, read 2026-10-14
- Mountain House, Just in Case 3-Day Emergency Food Supply, read 2026-10-14
Update history
| Date | Change |
|---|---|
| 2026-10-14 | First published |