Emergency Food Calculator
Emergency food calories, cans, and rice for any household and days.
What it does
Storms close stores fast. A counted food reserve turns three dark days into camp cooking instead of worry.
The tool above multiplies people by days. Two adults and two kids for three days need 20,400 kcal, or 51 cans and 12.8 lb of rice equivalent. The metric match is 5.8 kg of rice.
Daily rates anchor the math. Adults near 2000 kcal and kids near 1400 cover typical needs, with teens and nursing mothers above the line.
Cans translate calories to shelves. Four hundred kcal per can turns abstract thousands into countable tins that rotate by date.
Rice stretches cans. Dry staple pounds fill calories cheaply where cans add variety and protein.
How to use
- Enter adults and children.
- Enter days: 3 suits a starter kit.
- Read total calories first.
- Read cans next.
- Read rice equivalent.
- Store cool, dry, and rotate.
Formula
- adults
- Adults at 2000 kcal daily.
- kids
- Kids at 1400 kcal daily.
- days
- Days to cover.
Rice runs 1600 kcal per pound. Metric shows kilos at 0.453592 per lb with matching can counts.
Worked example
Example: family of 4, 3 days
Defaults: 2 adults, 2 kids, 3 days. These are also the default values, so the page opens on this answer.
- Household: 2 adults and 2 children.
- Daily: 2 x 2000 + 2 x 1400 = 6800 kcal.
- Days: 3.
- Total: 6800 x 3 = 20,400 kcal.
- Cans: ceil(20400 / 400) = 51 cans. Rice: 20400 / 1600 = 12.8 lb.
- Tool shows 20,400 kcal, 51 cans (400 kcal), 12.8 lb rice.
Reference table
| Household | Days | Calories |
|---|---|---|
| 1 adult | 7 | 14,000 kcal |
| Family of 4 | 3 | 20,400 kcal |
| Family of 4 | 14 | 95,200 kcal |
| 2 adults, 3 kids | 14 | 114,800 kcal |
Limits
- Calorie math only. Nutrition needs variety.
- Water, meds, fuel need own plans.
- Special diets need tailored kits.
- Pets need their own kit.
Common mistakes
- Storing with no dates or rotation.
- Calories with no cooker or can opener.
- All cans, no staple filler.
- Forgetting kids grow into adult rates.
- Hot garage storage that spoils fats.
Try it yourself
Quick checks. Answers sit tucked under each question.
1 adult, 7 days?
(1 x 2000 + 0) x 7 = 14,000 kcal. Cans are ceil(14000 / 400) = 35 cans. Rice is 14000 / 1600 = 8.8 lb after rounding (8.75).
2 adults, 3 kids, 14 days?
(2 x 2000 + 3 x 1400) x 14 = 114,800 kcal. Cans are ceil(114800 / 400) = 287 cans.
Questions
Total calories?
Add adult and kid calories, then multiply by days. Here (2 x 2000 + 2 x 1400) x 3 = 20,400 kcal.
How many cans?
Divide calories by 400 per can. Here ceil(20400 / 400) = 51 cans.
Rice equivalent?
Divide calories by 1600 per pound. Here 20400 / 1600 = 12.8 lb of rice.
Calories per person?
Adults 2000 kcal, kids 1400 kcal daily in this plan. Active teens and nursing mothers need more.
Rotate storage?
Yes. Rotate cans before dates and store cool and dry.
Water included?
No. Water, meds, and cooking fuel need their own plans.