S'mores Supplies Calculator

How it works

S'mores = ⌈people × share making them × s'mores each × (1 + extra%)⌉ · Marshmallows = s'mores × marshmallows each · Graham sheets = s'mores · Chocolate = ½ bar, 1 peanut butter cup or ~22 g of chips per s'more · Packages = ⌈amount ÷ pack size⌉ · Roasting sticks ≈ 1 per 2 guests · Firewood ≈ 1 bundle per hour

A s'more is one marshmallow, one full graham-cracker sheet snapped into two squares, and half of a standard 1.55-ounce chocolate bar — the same proportions Hershey’s uses in its own recipe. Because marshmallows get dropped, burnt or eaten straight off the stick, the calculator adds a cushion (15% by default). For a party or wedding s'mores bar, set the share of guests who will actually make one, since not everyone does. You can switch the chocolate to peanut butter cups or chocolate chips, use two marshmallows for a double-decker s'more, and change the package sizes to match what your store sells. The totals become a shopping list in bags, boxes and packs, with what will be left over, plus roasting sticks, napkins or wipes and a firewood estimate for the campfire. Add prices under More options to see the total, the cost per s'more and per person.

Worked example

For 12 people at 2 s'mores each with 15% extra: 12 × 2 × 1.15 = 27.6, so 28 s'mores. That is 28 marshmallows (1 bag of 40, 12 left over), 28 graham sheets (2 boxes of 27, 26 sheets spare) and 14 chocolate bars, or three 6-packs. You also want about 6 roasting sticks, 24 napkins and 2 bundles of firewood for a two-hour fire. At $3 a bag, $4.50 a box and $7 a six-pack, the total is $33, or about $1.18 per s'more.

Sources: Hershey's — classic s'mores recipe (1 bar, 2 graham crackers and 2 marshmallows make 2 s'mores)

Frequently asked questions