Cube Luck Calculator
See how many players would have needed more cubes for your potential.
Your cube luck
Add how many cubes you used and the lines you kept.
See how many players would have needed more cubes for your potential.
Add how many cubes you used and the lines you kept.
How it works
A cube result can feel lucky or cursed, but the odds are exact. Enter the equipment, cube, the rank you started from, the lines you kept, and how many cubes you used. The calculator finds the chance of your result or better per cube and compares your cube count with every player who chased the same result.
The calculator reuses the Cube Calculator's exact enumeration of every three-line outcome for the selected equipment, level, rank, and cube. It adds up the probability of every roll that matches your kept lines or better to find the chance per cube. With a rank-up, it combines the published rank-up rate for each step with the line chance, including the fact that the cube which ranks the item up also rolls new lines. Your luck is the share of players who would have needed more cubes than you, with an exact tie counted as half.
A level 200 Legendary hat with Bright Cubes has about a 0.14% chance per cube of rolling 33% or more total STR, roughly 1 in 700. The median player needs about 486 cubes. If you hit it on cube 50, you were luckier than over 90% of players. If it took 2,500 cubes, fewer than 3% of players needed that many, which lands deep in the unlucky tail.
Enter only the lines you actually wanted. Leaving a junk line as Any line keeps the comparison fair, because a player who rolled a different junk line still hit the same goal. If you were happy with either of two results, enter the one you got. To check rank-up luck by itself, choose a lower starting rank and leave all three lines empty.
GMS does not publish complete regular Potential tables, so line and rank-up rates use Nexon Korea's published KMS rates mapped to GMS cube names, the same assumption as the Cube Calculator. Miracle Time and other events, Bonus Potential, reveal costs, and Violet, Equality, and similar cubes are excluded. A luck percentile explains a past result; it cannot predict how many cubes the next attempt will take, because every cube is independent.