Gacha & odds

Drop rates: how to read a set table

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.

Rare positions Some tracks only appear in one specific pack of the box — the thirtieth one, for instance.

Case Boxes ship in cases of 24–48. The rarest things — god packs, for example — are tied to the case, not to a single box.

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

Here is how one of the Goddess Story sets is built. 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.

Case 48 boxes

Box 30 packs

Pack 6 cards — 6 tracks

×4 R / CR the base track: usually R, occasionally CR
×1 SR / SCR an SR track; occasionally SCR instead
×1 SR / SCR or SSR / SER ×8 or UR / PTR ×1 the track that decides rarity: usually SR/SCR, but eight times per box it is the SSR/SER slot, and once the UR/PTR one

×1 PR only in the thirtieth pack: a guaranteed PR

This box guarantees: eight packs with the SSR/SER slot — on average seven SSR cards and one SER — one pack with the UR/PTR slot, and one PR. In the remaining 21 packs that track yields SR or SCR.

What "per box" means

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

Value	How to read it
6	six cards of this rarity in every box
1	exactly one card per box
0.25	about one card per four boxes
0.02	about 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.

Open the "About the set" tab It sits next to the cardlist on every set page.
Take two numbers from the rarity row How many cards of that rarity the set has, and how many drop per box.
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 god 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 god 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 explained 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 in your browser 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 search for cards How to search 27,000 cards: filters by character, title, set and rarity, comma-separated values, exclusion with "!", strict mode and ready-made example links. Set codes and how to read them Decoding Goddess Story codes (pack price in yuan plus set index) and Kayou ones (tier and wave). How an online version differs from the offline one and which rarities drop only online. Card rarities Why SSR, UR and other markings follow no single standard, how to read the rarity order inside a set, and how main, bonus, extra, promo and redeem cards differ.