Sudoku Calcudoku Solver: Solve KenKen-Style Math Puzzles Online
Our free Calcudoku Solver is built for KenKen-style arithmetic puzzles on grids from 4x4 to 9x9. Draw the cages, enter each cage target and operation, add any givens if your puzzle includes them, then solve directly in your browser.
Calcudoku combines Latin-square logic with arithmetic. Every row and column must contain the digits 1 to N without repeats, where N is the grid size. Each cage also has a target number and an operation: addition, subtraction, multiplication, division, or a single-cell equals clue.
How to Use the Calcudoku Solver
- Choose a grid size from 4x4 through 9x9.
- Use Cages mode to drag connected cells into a cage.
- Enter the cage target and operation, then save it.
- Switch to Numbers mode to add any printed givens.
- Click Solve to complete the grid and check whether the puzzle has a unique solution.
What the Solver Checks
- No repeated digits in any row or column.
- Every cell belongs to exactly one cage.
- Each cage matches its target using the selected operation.
- Subtraction and division cages use the standard two-cell Calcudoku rule.
- The solution is unique or multiple solutions are possible.
The solver runs locally in your browser, so your Calcudoku layout and exported JSON are not uploaded anywhere.
Calcudoku, KenKen, and Grid Size
Many people search for a KenKen solver when they need a Calcudoku solver. The puzzle style is the same idea: arithmetic cages sit on top of a Latin-square grid. A 4x4 puzzle uses 1 to 4, a 6x6 puzzle uses 1 to 6, and a 9x9 puzzle uses 1 to 9. Larger grids are more demanding because the row, column, and cage rules interact in more places.
For best results, enter all cage clues before solving. If a puzzle has printed numbers, add them in Numbers mode after the cages are saved. The solver can then reject impossible layouts early instead of spending time on a puzzle that is missing a cage or has an impossible target.