This calculator will give you number combinations for Killer Sudoku cages based on the size of the cage and the target sum. It will also show if there are any required digits for the cage. If you don't know why any of that is useful, be sure to check out our Killer Sudoku From Scratch tutorial!
If you would rather see number combinations and required digits as a list, we have a cheat sheet here, or as a downloadable printable PDF here.
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