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Printable Sudoku

Pick a level, print a puzzle, and check it with the answer key. Every puzzle has exactly one solution, and a computer checks each one.

Pick a level

Difficulty: EasyEasy Printable Sudoku

Only one number fits: good for beginners · All puzzles + answers (US Letter) · A4

All easy puzzles (6)

Difficulty: MediumMedium Printable Sudoku

Look for where a number can go · All puzzles + answers (US Letter) · A4

All medium puzzles (6)

Difficulty: HardHard Printable Sudoku

Needs pencil marks · All puzzles + answers (US Letter) · A4

All hard puzzles (6)

How to play Sudoku

  1. Fill every empty square with a number from 1 to 9.
  2. Each row, each column and each 3 × 3 box must have every number from 1 to 9 exactly once.
  3. Start where a row, column or box is nearly full. Write small pencil marks when you are not sure.

For parents & teachers

For parents and teachers

The levels are graded by how a person solves them, not just by how many numbers are given. Easy puzzles can be finished by spotting squares where only one number fits. Medium ones also need "this number can only go here in this row". Hard ones need pencil marks.

Every puzzle has exactly one solution, checked by a computer before it is published. Each sheet is a one-page PDF in US Letter and A4, with a separate answer key so it can be handed out without spoilers.

  • Print at 100% scale for the clearest grid.
  • Use a pencil, not a pen.
  • Easy puzzles suit most kids from about age 8 who know the rules.