Play Calcu Doku online, a fast and fun HTML5 math puzzle that mixes Sudoku rules with arithmetic cages. Fill each row and column with the correct digits while using cage targets and operators to solve every puzzle.
This game is ideal for players who want to play a brain training game online. It loads in any modern browser and offers clear puzzles with a single solution so you can focus on logic and math.
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Desktop
- Click a cell with the mouse to select it.
- Press number keys 1-9 to enter digits.
- Use Arrow keys to move between cells.
- Press Backspace or Delete to clear a cell.
- Use on-screen buttons with the mouse for hints, undo, or notes.
Mobile
- Tap a cell to select it.
- Use the on-screen number keypad to enter digits.
- Long press a cell to add or remove pencil notes (if available).
- Tap hint, undo, or clear buttons on the screen to use those functions.
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Calcu Doku is an HTML5 puzzle game that combines classic Sudoku logic with basic arithmetic. Your goal is to fill every row and every column with the required digits so no number repeats in any row or column. The board is split into cages. Each cage shows a target number and an operator such as +, -, ×, or ÷. The digits you place inside a cage must combine with that operator to reach the target value.
The game challenges both logic and arithmetic. Each puzzle has exactly one valid solution, so you solve it by deducing which numbers fit each cell rather than by guessing. Common strategies include scanning rows and columns for missing digits, using cage targets to limit possibilities, and eliminating conflicting choices. Calcu Doku works in short sessions and rewards steady progress as puzzles grow harder.
- Grid logic: Fill each row and column with unique digits.
- Cage arithmetic: Use operators and targets to restrict cell values.
- One solution: Every puzzle is designed to have a single correct answer.
The interface is simple and fast. Because it is built in HTML5, Calcu Doku runs in modern browsers on desktop and mobile without downloads. Players who like Sudoku, KenKen, or quick brain training will find this game ideal for short practice sessions or longer logic challenges.
Game Details
Category
Hypercasual
Developer
Unknown
Technology
HTML5
Platform
Web Browser
Devices
Desktop, Tablet, Mobile
Game Features
Sudoku Meets Math
Combine Sudoku row and column rules with arithmetic cages to create a unique logic challenge.
Cage Operators
Use +, -, ×, and ÷ operators and target numbers in each cage to limit possible values.
Single Solution Puzzles
Each puzzle is designed to have exactly one correct solution so you solve with logic, not guesswork.
Quick HTML5 Play
Runs in modern browsers on desktop and mobile with no download required.
Suitable for All Levels
Puzzles scale from easy to hard making the game suitable for new players and seasoned solvers.
Frequently Asked Questions
Select a cell and enter a digit so that every row and column contains unique numbers. Make sure numbers in each cage combine with the given operator to reach the target value.
Yes. Calcu Doku puzzles are created with a single valid solution so you can solve them using logic and deduction.
Yes. The game is built in HTML5 so it runs in modern mobile browsers. Use tap controls and the on-screen keypad to play.
Use the undo or clear controls to remove an entry. You can also use hints if the game provides them to reveal a correct digit or guide your next move.
Many online versions are free to play in the browser. Check the specific site for any ads or premium features.