Calculator · Ireland

How many tins, jars and packs?

Pick a food, your household and how long, and see how many tins, jars or packs you'd need.

By the SupKit teamUpdated

The short answer

SupKit plans on 2,250 calories a day for an adult, 1,600 calories for a child and 1,100 calories for a toddler.1 Choose a food, who's at home and how many days, and the calculator turns energy into tins, jars or packs. SupKit estimate

How it works

Your household's daily energy comes from SupKit's figures for each age band, the same as the app. The calculator takes the share you choose and divides it by the energy in one pack, rounding up.

Energy per pack comes from SupKit's catalogue estimates. SupKit estimate

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.

  • Irish (EU) law names 14 allergens: gluten cereals, crustaceans, eggs, fish, peanuts, soybeans, milk, tree nuts, celery, mustard, sesame, sulphites, lupin and molluscs.2
  • On packaged food, allergens must stand out in the ingredient list, for example through font, style or background colour.3
  • For unpackaged food, allergen information must be in writing and easy to find before you buy.2
  • 'May contain' warnings are optional, used only where cross-contamination can't be ruled out, and can't replace good manufacturing practice.3

Young children

  • Don't give whole nuts to children under five; crush or grind nuts, and spread nut butter thinly.4
  • Don't give honey to babies under 12 months, and don't add salt to a baby's food.5

Questions

How many tins of beans for 30 days?

For one adult eating nothing but baked beans, about 215 tins; as a quarter of a mixed diet, about 54. This uses SupKit's estimate of 315 calories a tin.

Sources

  1. SupKit planning rules (SupScore 2026.5), SupKit. SupKit's own planning data.
  2. Food Allergens - Advice for Consumers, Food Safety Authority of Ireland. Checked 28 October 2026.
  3. Labelling - Allergens, Food Safety Authority of Ireland. Checked 28 October 2026.
  4. Food choking risks for babies and children, Health Service Executive. Checked 28 October 2026.
  5. Foods to avoid during weaning, Health Service Executive. Checked 28 October 2026.

We summarise official guidance in our own words. Always follow advice from your local authorities.

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