The industry sells days that are worth half a day. An adult needs about 2,000 calories a day, and more in the cold with a shovel in hand. Almost nobody on this shelf uses that number. Here are 2 listings from this page, in their own words:
The first gap is not my arithmetic against their marketing: it is the seller contradicting the maker, by a factor of 4. So this page carries a column the shops do not print — real days at 2,000 calories, worked out from the calories each maker publishes.
And then there is water. Every freeze-dried calorie assumes drinking water and something to heat it. In an ice storm the well pump is dead. A bucket is a promise that depends on 2 other systems; a ration bar depends on nothing.
Ration bars: nothing to add
We start here; shops do the opposite. A ration bar is eaten as it comes: no water, no fire, no dishes. In an ice storm, when the well pump is dead and the stove may be too, this is the only category that depends on nothing else. It is also the cheapest per real calorie.
| Product | Published calories | Claimed duration | Real days at 2,000 cal | Water | Cooking |
|---|---|---|---|---|---|
| BDH milk biscuit, 1.5 kg | 6,870 | 6 jours | 3.4 days | none | none |
| Ocean Food BDH chocolate, 1.44 kg | 6,840 | — | 3.4 days | none | none |
| BDH sea salt and pepper, 1.44 kg | 6,600 | — | 3.3 days | none | none |
| Mainstay, 3 × 2,400 calories | 7,200 | 9 jours | 3.6 days | none | none |
| Datrex, 120 bars of 200 calories | 24,000 | — | 12 days | none | none |
| Datrex, 18 bars of 200 calories | 3,600 | — | 1.8 days | none | none |
BDH milk biscuit, 1.5 kg
6 870 calories · 6 sachets · sans eau
The best calories-per-dollar on this page, by a wide margin. Compressed biscuits, vacuum sealed, eaten straight from the pack. Note the label though: the maker calls this « 6 days », which works out to 1,145 calories a day. At 2,000 the box holds 3.4. The product is fine; its arithmetic is generous.
Ocean Food BDH chocolate, 1.44 kg
6 840 calories · 12 sachets · sans eau
The same product in 12 small packs instead of 6 big ones, chocolate flavoured. The split matters more than it looks: an opened pack gets eaten that day, so 12 portions waste less than 6. Same factory, Qinhuangdao Ocean Food, which also supplies lifeboat rations.
BDH sea salt and pepper, 1.44 kg
6 600 calories · 12 sachets · sans eau
The savoury version, for anyone who does not want 3 days of sweet. A detail, until it is all you have: flavour fatigue makes people stop eating, and they stop eating exactly when they need it most. Buy one sweet and one savoury.
Mainstay, 3 × 2,400 calories
7 200 calories · −40 à 149 °C · sans soif
This one is formulated not to make you thirsty — it is a lifeboat ration, meant to go down with no water at all. The other figure that matters is the temperature range: −40 to 149 °C. It is the only one here that can spend a whole winter in the trunk without spoiling. 5-year shelf life.
Datrex, 120 bars of 200 calories
24 000 calories · homologué Garde côtière
This is the trade reference, and it is printed on the box: approved by the Canadian Coast Guard, the US Coast Guard and the CE. The pack of 18 bars shares the US approval; no other product on this page carries one. The cost per calorie is the highest of the bars. You are paying for the certification and for rationing in 120 pieces.
Datrex, 18 bars of 200 calories
3 600 calories · homologué USCG · sans soif
The small format, and the right place to start if you want to taste before buying a case: it is the same bar as the case of 120, in a pack of 18. Compressed and sub-packaged, ready to eat, no water needed — you open what you eat and the rest stays sealed. Nut-free and non-GMO, coconut flavoured. It is also the format that belongs in the go-bag rather than the basement.
Freeze-dried meals: hot water required
From here on, every claimed calorie assumes drinking water and something to heat it. It eats far better than a bar — and it is the right choice when the problem is an outage, not an evacuation. But if you buy freeze-dried before you have solved water, you have bought a promise, not a meal.
| Product | Published calories | Claimed duration | Real days at 2,000 cal | Water | Cooking |
|---|---|---|---|---|---|
| Mountain House, 72 hours | 5,118 | 3 jours | 2.6 days | required | required |
Mountain House, 72 hours
5 118 calories · 9 sachets · eau chaude
The most respected brand here, and the only one that honestly prints its calories per day: 1,706. It does not pretend to feed an adult at 2,000, and does not hide it. It is still the dearest calorie on this page — you are paying for taste, and the taste is genuinely better. 10 minutes, hot water in the pouch, no dishes.
The buckets: where the fake « 30 days » live
This is the aisle where the gap between the label and the plate is widest. Read the « real days » column before the « claimed » column, not after. A serious bucket tells you its calories per day; a bucket that does not has a reason not to.
| Product | Published calories | Claimed duration | Real days at 2,000 cal | Water | Cooking |
|---|---|---|---|---|---|
| ReadyWise, 60 entrées | 12,720 | 1 mois | 6.4 days | required | required |
| 72HRS, 200 servings | 28,000 | 14 jours | 14 days | required | required |
| 72HRS, large format | 60,000 | 1 mois | 30 days | required | required |
ReadyWise, 60 entrées
12 720 calories · « 1 mois » annoncé · eau chaude
This is the listing that gave this page its title. Amazon.ca sells it as « 1 adult for 1 month ». On its own site ReadyWise says « 7 days » and publishes the total: 12,720 calories. At 2,000 a day that is 6.4 days. The product is not bad — it is the seller's label that lies, by a factor of 4.
72HRS, 200 servings
28 000 calories · 2 000 cal/jour annoncés
This one does exactly what the others avoid: it prints « 2,000 calories per day » and « 28,000 calories total ». The 2 figures agree, so 14 claimed days are 14 real days. A Vancouver company. For a little more than the ReadyWise above you get twice the real days — that is the whole story.
72HRS, large format
60 000 calories · 2 000 cal/jour annoncés
Same maker, 60,000 calories, so 30 real days. One honest caveat: the Amazon listing contradicts itself, claiming « 1 month » in one sentence and « 9 months » in the next. The calories are consistent with 1 month. If you order it, expect 1 month and check the contents on delivery.
№ 10 cans: ingredients, not meals
Last category, and the most misunderstood. A № 10 can is not a ration: it is a freeze-dried ingredient that keeps 25 years and rounds out what you already cook. Cost per calorie makes no sense here and I do not show it: nobody lives on dried meat. These cans make the rest of your pantry edible, they do not replace it.
Mountain House, № 10 can, meats
25 portions · bœuf haché lyophilisé · 25 ans
Ground beef, cooked then freeze-dried, no preservatives. It is expensive, and it only makes sense if you already keep rice, pasta and pulses in quantity. Protein is what is missing from nearly every home store I see.
Ready Harvest, whole foods
lyophilisé · aliments entiers · longue garde
Whole freeze-dried foods rather than assembled meals: you control what you eat and you are not paying for powdered sauces. It is the approach I prefer for a deep store — provided you like cooking, because nothing here is ready to eat.
My reservations
- For 3 to 7 days, your own pantry wins. Tinned food you already eat and rotate is cheaper per calorie than anything on this page, and you know you like it. Buy a case of what you cook with anyway, and a manual tin opener. That is the honest first purchase.
- Solve water before you buy food. A freeze-dried bucket without water is a bucket. 3 days without water kills; 3 weeks without food does not.
- Taste it before you need it. Open one pack this year. Flavour fatigue is real, and people stop eating exactly when they need the calories most.
- 25 years is the can, not the nutrition. Vitamins degrade long before the calories do. A store you rotate beats a store you forget.