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Gacha & odds

Drop rates: how many boxes until the card you want

Every mapped set has a table: rarity → cards in the set → how many drop from a single box. It is built from the real box structure — a fixed number of packs, tracks inside a pack, slots and guaranteed cards. To find how many boxes one card of a rarity takes, divide one by the "per box" number.

What a box is made of

A box is not a bag of random cards. It holds a fixed number of packs, a pack holds fixed tracks, and a track draws its card from its slot.

Packs The manufacturer sets how many packs a box holds: usually 30, sometimes 18, 20 or 10.
Tracks A pack is split into tracks — the card positions inside it. Six cards per pack means six tracks, each with its own set of possible slots.
Slots A slot is the bucket a track draws from. Inside a slot there can be a roulette of its own: SSR, or far more rarely SER.
Guarantees Some slots declare how many such cards the whole box contains. That is exactly how many drop — no more, no less.
Reprints Some slots draw cards from other sets — reprints with the listed numbers. Such rarities are marked "reprint from …" in the table and are absent from the set's own cardlist.
Duplicate limits Some sets define how many identical cards a pack or box may contain — this does not change the rarity counts, only the repeats.
Case From the factory, boxes come packed in cases of 16–48. In China they are simply called a "box". Not to be confused with print runs.
Print run A single print run of cards made by the printing house. Not to be confused with cases: one case may hold cards from different runs — reprints, for example, are not printed specially for new boxes.
God pack An incredibly rare booster in which the standard rarity distribution is deliberately replaced with the highest possible one.

This is why the odds for a rarity and the odds for one particular card are different numbers: the slot in the box is fixed, but which card fills it depends on the set print run.

A box in detail: NS-02-M09

Read the nesting top down: a case holds boxes, a box holds packs, a pack holds tracks, and a track draws its card from a slot. The diagram is built from the set's drop table — pick any set with a mapped box.

Case48 boxes
Box30 packs
Pack6 cards
  • 1R83,3%CR16,7%30 packs
  • 2R83,3%CR16,7%30 packs
  • 3R83,3%CR16,7%30 packs
  • 4R83,3%CR16,7%30 packs
  • 5SR80,8%SCR19,2%30 packs
  • 6SR80,8%SCR19,2%21 packs
  • orSSR87,5%SER12,5%8 packs
  • orUR50%PTR50%1 pack
Some cards are reprints from: NS-02-M08
  • +1PRbonus in pack #30

Open the set page: pull rates and prices →

The line under a slot is how many packs of the box it appears in; a slot without it is in every pack. Several rarities in one slot mean a roulette — each share is shown next to it.

What "per box" means

It is an expected value: how many cards of that rarity an average box yields.

ValueHow to read it
6six cards of this rarity in every box
1exactly one card per box
0,25about one card per four boxes
0,02about one card per fifty boxes

An expected value describes the average box over a long run, not the one in your hands. Only cards with a guarantee in the box structure are actually guaranteed.

Odds for one specific card

Divide the expected number of cards of a rarity per box by how many cards of that rarity the set has.

  1. Open the "About the set" tab It sits next to the cardlist on every set page.
  2. Take two numbers from the rarity row How many cards of that rarity the set has, and how many drop per box.
  3. Divide One SSR per box with 30 SSR cards in the set means roughly 30 boxes per specific SSR.

The maths assumes all cards of a rarity are equally likely. Where cards carry a print number, rare print runs show up less often — such a card costs more than the estimate suggests.

How exact these numbers are

Some odds are official, others are reconstructed. We do not pass the latter off as the former.

Kayou sets For this manufacturer the box structure and odds come from official sources.
Everything else Where the manufacturer publishes nothing, the structure is reconstructed from large unboxings, available data and hands-on experience with boxes. It is a close approximation, not a manufacturer document.
Refined as data arrives The more opened boxes enter the statistics, the more accurate the table gets — we fix discrepancies.
Spotted a discrepancy? Tell us Data about your box helps refine the table for everyone: feedback.

Even an official table describes an average box: manufacturers change contents between print runs, and some cards are printed in limited quantities.

Common questions

Where do I see the odds for a specific set?
On the set page, "About the set" tab: a table of rarity → cards → per box → market price → on sale. Find a set in the catalogue.
Where do the odds come from?
For Kayou sets, from official sources. For the rest the box structure is reconstructed from large unboxings and available data, so it is a close approximation. Odds like "1 in 2.74" are converted into cards per box.
Does every set have a drop table?
No. The box structure is mapped for over a hundred sets; for the rest the "per box" column is empty, while the cardlist, prices and stats are still there.
What is a special pack?
A rare pack that replaces a normal one and consists entirely of high rarities. It is tied to the case: the odds are set as special packs per case, and the box maths already accounts for them.
Do these odds match the virtual gacha?
Yes — the gacha opens a copy of the same box from the same table. See the gacha guide.

Check the odds for your set

Open a set and its "About the set" tab for the rarity table, prices and stats.

Set catalogue How the gacha works

Other guides

The virtual gacha: is it fair The virtual gacha opens a copy of a real box: same slots, guarantees and print runs. Cards come from a deck, not a dice roll. Cost, demo mode and where pulls end up. Waifuchan: a tamagotchi with minigames Waifuchan is a tamagotchi starring the WaifuCards mascot: real-time care, minigames built on the card collection, the Shikaku puzzle with ranks and seasons, its own currency and real consequences for neglect. How to sell your own cards How to list cards for sale: the "To sell" mark, a price (without one a listing is barely found), shop settings with shipping and terms, and handling orders. How to buy a card from a collector Buying cards from collectors: the cart, sending an order to the seller in chat, deal stages from picking to delivery confirmation, payment and reviews. What a card costs, and why A card price on WaifuCards is the median of live collector listings, backed by a reference price per rarity. How to check the price of a card, a rarity or a whole set.