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.
Tinned foods and dried foods like pasta and rice carry best before dates rather than use-by dates.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
- Tinned foods and dried foods like pasta and rice carry best before dates rather than use-by dates.1
- In the UK, a best before date is about quality: food is usually still safe afterwards but may be lower quality.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 2,000 calories, deliberately on the low side so stores aren't overestimated.2 An adult needs around 2,250 calories 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.
- UK food law names 14 major allergens, including cereals containing gluten, milk, eggs, fish, peanuts, tree nuts, soya, sesame, celery, mustard and sulphites.4
- On pre-packed food in the UK, these allergens must be emphasised in the ingredients list, for example in bold.4
- 'May contain' warnings aren't a legal requirement, so a missing warning doesn't guarantee a food is free of an allergen.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 2,000 calories per jar and 2,250 calories 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
- Food labelling: best before and use-by dates, GOV.UK. Checked 28 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
- 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.
- Food allergy and intolerance advice for consumers, Food Standards Agency (GOV.UK). Checked 28 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
- Foods to avoid giving babies and young children, NHS. Checked 28 October 2026.
We summarise official guidance in our own words. Always follow advice from your local authorities.
