Planning 3 months of emergency food storage is one of the most widely recommended preparedness goals — from FEMA to state emergency management agencies. But translating "3 months" into actual quantities, costs, and shelf space requires real math. This guide gives you exactly that.
The Simple Formula
To calculate your household's 90-day calorie requirement:
Count adults: each needs 2,000 calories/day
Count children under 12: each needs 1,500 calories/day
Add together, multiply by 90 days
Example — family of 4 (2 adults, 2 kids):
(2 × 2,000) + (2 × 1,500) = 7,000 cal/day × 90 = 630,000 calories needed
What 630,000 Calories Looks Like in Products
Product
Cal/Serving
Servings Needed
Approx. Units
Mountain House pouches (2-srv)
500–700
~1,050
~525 pouches
Augason Farms #10 cans (~35 srv)
150–400
~2,000
~57 cans
Mountain Essentials buckets
~200
~3,150
~3 buckets
White rice (bulk, 50 lb bag)
338/cup
—
~90 lbs
Best-value approach: Build a calorie base with bulk staples (rice, oats, beans) and supplement with freeze-dried meals for nutrition, variety, and easy preparation. A 70/30 staples-to-freeze-dried split dramatically reduces cost without sacrificing readiness.
Recommended Storage Breakdown
Water: The Overlooked Part of Food Storage
Freeze-dried food requires 1–2 cups of water per serving to rehydrate. FEMA recommends at least 1 gallon per person per day for drinking and sanitation combined.
Household
Min. Water/Day
90-Day Total
1 person
1 gallon
90 gallons
Family of 4
4 gallons
360 gallons
Family of 6
6 gallons
540 gallons
Storing 90 days of water in full is rarely practical. A quality gravity-fed water filter (Berkey, Sawyer) lets you source and purify water from rivers, rain collection, or a municipal supply during outages — a far more flexible solution.
Budget Plan: Getting to 3 Months in Phases
Phase 1 — $200–300: Buy 3 months of bulk rice, oats, beans, and salt (the calorie base)
Phase 2 — $400–600: Add 8–10 #10 cans of freeze-dried proteins and vegetables
Phase 4 — $100–200: Fill gaps — cooking fuel, manual can opener, vitamin supplements
Frequently Asked Questions
How many calories per day do I need in an emergency?
Plan for 2,000 calories/day per adult at rest. If doing physical labor during an emergency, increase to 2,500–3,000. Children 6–12 need approximately 1,500 cal/day.
How much does 3 months of food storage cost?
For one adult, an all-freeze-dried supply runs $500–800. A family of 4 using a mixed staples + freeze-dried approach can achieve solid 3-month coverage for $1,200–2,000 built over time.
Should I buy freeze-dried food or regular canned goods?
Both have a role. Canned goods are cheaper per calorie but have shorter shelf life (2–5 years) and are heavier. Freeze-dried offers 25–30 year shelf life, lighter weight, and faster preparation. Most preppers use a mix of both.
Can I buy a pre-assembled 3-month kit?
Yes — many brands sell 3-month supply kits (typically 1,800–2,000 cal/day for one person). Convenient, but often more expensive per calorie than assembling your own from individual #10 cans.
I received a kindly email saying that an unexpected delay in shipping occurred, but that the order would be fulfilled at the earliest possible time. It would've been helpful to have been given tracking information so that I could have some idea when it might arrive and so leave my gate open.
As it happened, the package was delivered unexpectedly and left outside of the gate. The mill was packaged reasonably well, although the temporary, transport-security base was broken. All of the iron parts were undamaged.
The assembly instructions do not exactly correspond to the model I received, but it was not too difficult to figure out.
As with most metallic items that come into contact with food, I believed that those surfaces should be cleaned with mild soap and warm water before use. However it is not easy to remove the center shaft. I used a rubber mallet to drive out the shaft, the spring augur, and bearings.
After washing, drying, and re-assembly, a test grind produced nice flour, although not as fine a grind as I have gotten with hand-operated stone mills.
The advantage of this mill is easy cleaning of the grind plates and no stone particles in the flour. Also, the mill is nicely heavy and easy to operate, and can be belt driven with a slow-enough electric motor. Step-down gearing could also be used, if necessary.
A suggestion would be to include an exploded-view diagram, showing all of the clearly named parts.
The Owner's Manual makes no mention of it, but replacement parts *might* be available if they are asked for through the chat feature on the SafeCastle website.
The can arrived well packaged & w/ no dents. My wife used the canned ground beef to make beef stroganoff. The result was excellent & every bit as good as store bought hamburger meat. It's just plain ground beef w/ no spices or flavorings added. We liked that because we could flavor it to our taste. Thank you.
