How Long Do Emergency Ration Bars Last? (Datrex Guide)
Updated: 7 hours ago
Quick answer: Most emergency ration bars last 5 years from the date they were made. Datrex, one of the best-known brands, lists a shelf life of 5 years from the date of manufacture for its 2,400-calorie pack, and the U.S. Coast Guard rules for lifeboat rations require the package to show the month and year of expiration, 5 years after the date of packing. Keep them sealed, cool and dry, check the printed date once a year, and replace them before it runs out.
That's the short version. Below you'll find what these bars actually are, how to read the date on the pack, how hot is too hot, how many bars one person needs per day, how they compare with MREs and canned food, and a simple rotation checklist you can print.
What are emergency ration bars?
Emergency ration bars (also called emergency food bars or lifeboat rations) are dense, baked bars sealed in a foil pouch. They were built for survival at sea, where a life raft has to carry enough food in a tiny space for years without anyone checking on it.
A typical pack is a small brick of pre-portioned bars. Datrex's 2,400-calorie pack holds 12 individually wrapped 200-calorie bars and weighs 17 ounces (482 grams), about the size of a large bar of soap. Datrex also makes 1,000, 2,400 and 3,600 calorie packs.
What's inside is simple. Datrex lists wheat flour, palm oil shortening, cane sugar, water and natural coconut flavoring, with no preservatives. The company describes the bars as ready to eat and "non thirst provoking," and says they can be eaten solid or mixed with water. SOS Products, a retailer, describes the taste as a shortcake cookie with a mild coconut flavor.
Why so many packs are 2,400 calories
That number isn't random. U.S. Coast Guard lifeboat rules say emergency food for each person must provide at least 10,000 kilojoules (2,390 calories). A 2,400-calorie pack is one person's full lifeboat food supply in one block. Datrex says its rations are approved for use in USCG/SOLAS/ISO life rafts, and the 2,400 pack is listed as meeting Coast Guard requirements under the ISO 18813 standard.
So when a listing says "Coast Guard approved," it means the bar was made to the standard for ship survival craft. It doesn't mean it's a complete diet for weeks. More on that below.
How long do emergency ration bars last?
The standard answer is 5 years. Here's where that number comes from and what it means for you.
Manufacturer shelf life: Datrex lists 5 years from the date of manufacture on its 2,400-calorie ration. Its brochure says the same for its emergency food rations and drinking water.
The legal label rule: Coast Guard rules for lifeboat provisions require the container to be marked with the lot number, the month and year it was packed, and the month and year of expiration, 5 years after packing.
Temperature range: retailer SOS Products lists the Datrex 2,400 bar as able to withstand -22°F to +149°F. That's why these bars are popular for cars, where MREs and canned food have a harder time.
Can you eat ration bars after the expiration date?
The 5-year date is the maker's guarantee, not a timer that turns the food toxic. The USDA explains that most food dates are about quality, and that a product should still be safe and wholesome if handled properly until spoilage is evident, with infant formula being the main exception.
That said, ration bars are high in fat, and fat slowly goes stale (rancid) over time, especially in heat. An old bar may taste off, crumble more or lose some quality. Our advice:
Inside the date: keep it in your kit.
Past the date, pouch intact, smells and tastes normal: fine as a camping or hiking snack, but replace it in your kit.
Past the date and stored hot for years, or any spoilage sign: throw it out. Ready.gov's rule applies here: toss any food with an unusual odor, color or texture.
Don't stake your family's safety on expired food. A new pack costs less than a pizza.
How to read the date on a ration bar pack
Turn the pack over and look for a printed or stamped block of text. On Coast Guard-compliant rations it should include:
Lot number: the production batch. Handy if there's ever a recall.
Packed or manufacture date: month and year it was made.
Expiration date: month and year, 5 years after packing.
If you only see one date, it's almost always the expiration. When you buy, write that date in big marker on the outside of your kit bag or bin too. You'll check it faster later, and you won't have to dig the pack out to look.
Storage: how to make ration bars last the full 5 years
Ration bars are tough, but a few habits make a real difference.
Keep the vacuum seal intact. The foil pouch is what keeps air and moisture out. Don't open the outer pack until you need it.
Cool and dry is best. A closet, under a bed or a basement shelf beats a hot garage or attic.
Heat is the enemy of taste, not usually safety. Bars rated to 149°F can ride in a car, but years of summer heat speed up staleness. Check car-kit bars more often.
Protect from crushing and pests. Keep them in a bag pocket, a hard bin or a canteen cover, away from sharp tools that could puncture the pouch.
Keep them away from fuel and chemicals. Strong smells can seep into food stored in a trunk with gas cans or cleaners.
Signs a ration bar has gone bad
Check for these when you do your yearly kit check:
Puffed, torn or punctured pouch, or a pack that's lost its tight vacuum feel
Moisture, mold or sticky spots inside the wrapper
Sour, paint-like or "old oil" smell when opened
Bars that are discolored or bitter
If you see any of these, throw it out and replace it.
How many ration bars per person per day?
It depends on whether you're trying to survive or trying to feel okay. There are two useful numbers.
The lifeboat survival rate. Coast Guard rules require ration instructions that assume 3,350 kilojoules per person per day. That's about 800 calories, or four 200-calorie bars a day. The SOS Products listing gives the same idea: eat one bar every 6 hours. At that rate, one 2,400-calorie pack feeds one person for 3 days. That's a survival diet for people sitting still in a raft, not a comfortable one.
The normal-day rate. The Dietary Guidelines for Americans, 2020-2025 (PDF) estimate that most adults need about 1,600 to 3,000 calories a day, depending on age, sex and activity. If ration bars are your only food and you're moving around, cleaning up or walking out, plan on about one 2,400-calorie pack per adult per day.
Plan | Bars per person per day | Calories | One 2,400 pack lasts |
|---|---|---|---|
--- | --- | --- | --- |
Lifeboat survival | 4 bars | about 800 | 3 days |
Light activity | 8 bars | about 1,600 | 1.5 days |
Normal adult day | 12 bars | about 2,400 | 1 day |
Simple rule for kits: For a go-bag or car kit, one 2,400-calorie pack per person is a good starting point. That's a full day of food at a normal rate, or 3 days at the survival rate. For home, ration bars are the backup, not the whole plan. Pair them with food you actually like to eat, like canned goods or MREs.
Kids need less. The same Dietary Guidelines put children ages 2 through 4 at about 1,000 to 1,600 calories a day. Bars are crumbly and dry, so for little ones, you can soften a bar with a little water, since Datrex says the bars can be eaten solid or mixed with water.
Ration bars and water: don't skip this part
Ration bars are dry. Even "non thirst provoking" bars don't replace water. Ready.gov says to store at least one gallon of water per person per day for several days, and notes that a normally active person needs about three-quarters of a gallon of fluid a day. In very hot weather, water needs can double.
Ready.gov also warns: never ration drinking water unless authorities tell you to. Drink what you need today and look for more tomorrow. If water is short, cut back on food before you cut back on water.
For kits where a gallon jug is too bulky, sealed water pouches pair naturally with ration bars. Just do the math: a few pouches help, but they won't cover a full day by themselves.
Ration bars vs MREs vs canned food
Each one has a job. Here's how they stack up.
Feature | Ration bars | MREs | Canned food |
|---|---|---|---|
--- | --- | --- | --- |
Typical shelf life | 5 years from manufacture | About 3 years at 80°F, longer when cool | 12-18 months (high-acid) to 2-5 years (low-acid) |
Calories | 2,400 per 17 oz pack | About 1,250 per meal | Varies by can |
Cooking needed | No | No (heater usually included) | No, but a can opener |
Heat tolerance | Rated -22°F to 149°F | About 6 months at 100°F | Avoid heat and freezing |
Taste and variety | One flavor, gets old fast | Many menus | Whatever you buy |
Best place | Car, go-bag, office, boat | Home, camping, go-bag | Home pantry |
Sources: Datrex and SOS Products for ration bars; the Defense Logistics Agency for MRE calories and the 3-years-at-80°F rating, and the Army Leader's Guide to rations (PDF) for the 100°F figure; the USDA shelf-stable food guide for canned food. Our MRE shelf life guide covers how heat changes MRE life, and our canned food shelf life chart breaks down cans by type.
The short take: ration bars win on size, weight and heat. MREs win on real meals and morale. Canned food wins on cost and variety at home. Most smart kits use all three.
Where to stash ration bars
Because they're small, light and heat-tolerant, ration bars fit places other food can't.
Car or truck: one pack per regular passenger, plus water. Our car emergency kit checklist shows what else belongs in the trunk.
Go-bag: one 2,400 pack per person covers a day of walking or a few days at survival rate. See the full list in our bug out bag checklist.
Work desk or locker: in case you're stuck at work after an earthquake, storm or transit shutdown.
Kids' school or daycare kit: check the school's food rules first. Datrex says its rations are nut free and vegan, but they do contain wheat.
Boat, RV or cabin: this is exactly what they were made for.
Ration bar rotation checklist (print this)
Do this once a year. Pick an easy date, like your birthday or the day the clocks change.
Pull every ration pack from cars, bags, desks and bins
Read the expiration date on each pack
Replace any pack that expires in the next 12 months
Check each pouch for tears, punctures, swelling or lost vacuum
Eat or toss older bars (snack them on a hike if they smell and taste normal)
Write the new expiration date in marker on the kit bag
Check water pouches and bottles at the same time
Count: at least one 2,400 pack per person in each kit
Put everything back where your family knows to find it
Shop picks for ration bars and water
These are the items we carry that fit this guide. All ship to the lower 48 states and DC.
Datrex 2400 Calorie Emergency Food Ration: $12.99. Twelve pre-portioned, coconut-flavored bars totaling 2,400 calories in one vacuum-sealed pack. Grab one per person for each car and go-bag.
Datrex Emergency Water, 64 Pack: $41.99. Ready-to-drink 4-ounce pouches with no treatment needed. 64 pouches is about 2 gallons, so think of it as a carry supply for bags and cars, not your whole home water plan.
MRE Meals Ready to Eat A or B Case: $89.95 for 12 meals, plus $19.99 shipping per case. Real meals for home storage, to go with bars in the car. Not sure how many? Use our MRE calculator.
Single MRE, Random Menu: $9.99. Try one before you buy a case.
FAQ
How long do Datrex ration bars last?
Datrex lists a shelf life of 5 years from the date of manufacture for its 2,400-calorie emergency food ration. The expiration month and year are printed on the pack.
Are expired emergency food bars safe to eat?
If the pouch is intact and the bar looks, smells and tastes normal, a bar a little past its date is usually a quality issue, not a safety one, according to USDA guidance on food dates. But old bars can taste stale or rancid, so replace them in your kit and don't rely on expired food in an emergency.
How many calories do I need per day from ration bars?
Coast Guard lifeboat rules plan on about 800 calories (3,350 kJ) per person per day, which is four 200-calorie bars. That's a bare survival amount. For a normal active day, most adults need about 1,600 to 3,000 calories, roughly one 2,400-calorie pack.
Can I keep emergency ration bars in a hot car?
Yes, that's one of their strengths. The Datrex 2,400 bar is listed as withstanding -22°F to 149°F. Heat still makes them go stale faster, so check car-kit bars every year and replace them on time.
Do ration bars make you thirsty?
Datrex describes its bars as "non thirst provoking," but they're dry food and you still need water. Ready.gov recommends storing at least one gallon per person per day, and you should never ration drinking water unless told to.
Bottom line
Emergency ration bars are one of the easiest preps there is: buy a pack per person, toss it in the car and the go-bag, write the date on the outside, and check it once a year. They last about 5 years, handle heat better than most food, and pack a full day of calories into a pocket-sized block. Just remember they're a backup. Pair them with water and real meals at home, and you've covered both the "stuck on the road" and the "stuck at home" emergencies.
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