Peanut butter in your emergency supplies
How many jars of peanut butter your household needs, what the date on the label means, and allergens to check.
Use-by is a safety date: food can't be sold after it. Best-before is about quality: food can still be sold if fit to eat.1 For 30 days, one adult would need about 34 jars on peanut butter alone, or 9 jars as a quarter of their food. SupKit estimate
What the date on the label means
- Use-by is a safety date: food can't be sold after it. Best-before is about quality: food can still be sold if fit to eat.1
- Foods that keep for two years or more, such as some canned foods, don't need a best-before date.1
Store peanut butter somewhere cool and dry, and check each jar for damage before you use it.
How much to store
SupKit estimates one peanut butter 340g at about 8,368 kJ (2,000 Cal), deliberately on the low side so stores aren't overestimated.2 An adult needs around 9,414 kJ (2,250 Cal) a day in SupKit's planning figures.
Nobody should live on one food, so this table assumes peanut butter makes up a quarter of the food.
| Household | 3 days | 7 days | 14 days |
|---|---|---|---|
| One adult | 1 | 2 | 4 |
| Two adults | 2 | 4 | 8 |
| Two adults and two children | 3 | 7 | 14 |
The calculator above changes the household, the days and the share of food.
When to start using it
At everyday pace, two adults get through 4 jars of peanut butter in about 7 days, so SupKit starts suggesting it about 3 weeks before the date.3
Eating your reserve in everyday meals and replacing it as you go keeps it fresh, so nothing ends up in the bin.
Allergies, dietary needs and children
Plan around everyone at home: allergies, intolerances and diets come first, and familiar food matters most for children. Recipes vary between brands, so always read the label of the product you buy.
| Food | Typical allergens | Typically suitable for |
|---|---|---|
| Peanut butter | peanuts | vegan, gluten free |
Typical allergens and diets are SupKit's guide to the main ingredient, not a product's label.
- Labels must declare wheat, fish, crustacean, mollusc, egg, milk, lupin, peanut, soy, sesame, named tree nuts, gluten cereals (barley, oats, rye) and added sulphites.4
- Allergens must be in bold in the ingredient list, plus a separate bold summary starting with 'Contains' near the ingredients.4
- 'May contain' statements are voluntary and not regulated by the Food Standards Code.4
Young children
Questions
How many jars of peanut butter for 30 days?
For one adult, about 34 jars on peanut butter alone, or 9 jars as a quarter of a mixed diet. This uses SupKit's estimate of 8,368 kJ (2,000 Cal) per jar and 9,414 kJ (2,250 Cal) a day for an adult.
What allergens does peanut butter contain?
Typically peanuts. Recipes vary, so always read the label of the product you buy.
Sources
- Use-by and best-before dates, Food Standards Australia New Zealand. Checked 28 October 2026.
- SupKit product catalogue (typical nutrition estimates), SupKit. SupKit's own planning data.
- SupKit Use First rotation rules (2026.1), SupKit. SupKit's own planning data.
- Allergen labelling for consumers, Food Standards Australia New Zealand. Checked 28 October 2026.
- Nuts and seeds, Better Health Channel, Department of Health, State Government of Victoria. Checked 28 October 2026.
- Introducing solid food, Pregnancy, Birth and Baby (Healthdirect Australia, funded by the Australian Government). Checked 28 October 2026.
We summarise official guidance in our own words. Always follow advice from your local authorities.
