Methodology
How calculations are checked
Each calculator turns published game mechanics into the odds shown on the page. We check the maths and explain the assumptions that affect your result.
When the odds change
We check a calculator again after a relevant game update that could change its result.
Barrows Drop Calculator
For chests where all six brothers were killed, the calculator uses seven reward rolls with a 1/102 equipment chance on each roll. For one exact item, it divides that chance across the 24 Barrows equipment items, giving 7/2,448 per chest.
Scope
The calculator compares Barrows equipment from all-six-brothers chests. It does not cover common rewards, selective brother kills or collection log completion.