What Lunchbox Snacks Actually Cost

Most of what I have written about lunchbox cost is about the main — the sandwich, the pasta, the thing in the Thermos. That is where the recipes are. But a complete lunchbox in this planner is a main plus a piece of fruit plus a second snack, and those two snack slots come to about $1.54 of it. On a $3.85 box that is well over a third of the money, decided in the ten seconds you spend at the fruit bowl.

So this one is about the snacks. All 41 of them, priced a serve at a time.

How this is measured

Each snack is costed the way the planner costs it: the pack price we track for the ingredient, multiplied by the fraction of that pack one serve uses. An apple is a share of a 1kg bag; crackers are a share of the box. That is the number that ends up in your week, rather than the shelf price of the whole pack.

Every one of the 41 snacks priced cleanly — no missing ingredient prices, so nothing here is an average with a hole in it.

The four boxes

† Sweet Treat is priced here for comparison but the planner's generator does not draw from it. It is in the data because it is in the kitchen, not because the tool recommends it.

Fruit & Veg is the dearest box at $0.82 a serve, 11% above Sweet Treat. And Savoury Crunch is the cheapest at $0.59 — which is the part that matches what most people expect. Packet snacks are cheap; fresh fruit is not.

That is where the usual story stops, and it is the least interesting thing in the table.

The gap is inside the box, not between the boxes

Look at the spread column instead of the median column. What it shows is that the gap inside one category is far wider than the gap between categories — 7.6× inside Fruit & Veg against 1.4× between the category medians.

Carrot Sticks at $0.22 and Strawberries at $1.66 are both Fruit & Veg. Same category, same slot in the lunchbox, $1.44 apart — more than the entire distance between the dearest category median and the cheapest one.

Meanwhile Protein & Dairy barely moves at all: 1.5× from Cheese Cubes to Probiotic Drink. If you are packing something from that box, which one you grab is very nearly a free choice.

Read those two blocks together and the practical question changes shape. "Fruit or a packet of something?" moves you between $0.59 and $0.82 — $0.24. "Which fruit?" moves you $1.44. Over a five-day week, holding everything else the same, that one habit is about $7.20.

What this does not say

It does not say to pack Carrot Sticks instead of Strawberries. Berries in a lunchbox are not a budgeting mistake, and a child who eats the strawberries and leaves the carrot sticks has cost you nothing at $1.66 and everything at $0.22. Cost per serve is one axis. It is not the only one, and this site has no opinion on your child's appetite.

It also is not a nutrition claim. Cheapest in the table is not healthiest in the lunchbox, and nothing here is arranged to suggest otherwise — the Savoury Crunch box wins on price precisely because crackers and dried things are cheap per gram, which is not an argument for packing more of them.

These are one chain's tracked prices, read weekly. Fresh produce moves the most of anything we track, so the fruit rows in particular will look different in a month — the spread is the durable finding, not the individual figures. And the categories are mine: I decided that a Probiotic Drink is Protein & Dairy and not a sweet treat, and a different split would produce different medians.

The data

Every pack price and pack size behind these numbers is in lunchbox-ingredients.csv, so any serve cost above can be recomputed from the two numbers it came from. The same pack-size effect across mains rather than snacks is in the shelf price is not the lunchbox price, and the weekly shelf-price movements behind the produce rows are on the NZ Lunchbox Price Index.

If you want this applied rather than read: generate a week and the snack slots get costed with everything else.