Know your real odds before you spend
Five calculators for the questions gacha players actually ask: what are my chances, how far am I from pity, what will it cost, and how many runs is this grind really. Everything runs locally in your browser.
Gacha probability
The chance of at least one hit in N pulls, plus the pulls you actually need for 50%, 90% and 99% confidence.
Calculate oddsPity calculator
Soft pity, hard pity and the 50/50 modelled pull by pull, with presets for Genshin, HSR, WuWa, ZZZ and FGO.
Check my pityGacha cost
Convert pulls into currency and dollars, see what a pity really costs, and how a monthly pass changes the price.
Price it outCrit value
Score artifacts with CV = 2 × crit rate + crit damage, strip out base stats, and get a rating band.
Score a pieceDrop rate
How many runs until it drops, the average versus the median grind, and runs for 90% or 99% confidence.
Plan the grindWhy these tools exist
Pity counters, 50/50s and "1 in 100" drop rates are easy to misread, and the mistakes almost always point the same way: players overestimate how likely they are to get something soon, and underestimate how bad the unlucky tail can be. Every calculator here uses the actual probability model rather than a rule of thumb, and shows the assumptions so you can check them.
What you can work out here
- Whether 90 pulls is a plan or a coin flip (it is a coin flip).
- How much a guaranteed character costs once the 50/50 is factored in.
- Why a 1% drop can take 300 runs and still not be unusual.
- Which of two artifacts is actually better, ignoring the noise.
What these tools are not
They are not affiliated with any publisher, they do not connect to your account, and they do not predict the future. Rates change, regional versions differ, and a calculator cannot tell you whether a banner is worth your money. It can only tell you what the numbers say.