Free Shikaku Maker
Free Shikaku Generator
Cut the grid into rectangles — one number each, area equal to the number
Updated Oct 31, 2026
Shikaku asks you to partition the whole grid into rectangles so that each rectangle contains exactly one number and has an area equal to that number. A 6 becomes a 1×6, 2×3, 3×2 or 6×1 block, and choosing between those options is the entire puzzle. It is a rare logic puzzle that rewards thinking about factors and space rather than sequences, which makes it a good bridge between maths and geometry work. Sizes are 6×6, 8×8 and 10×10, each exporting as a printable PDF with the answer key.
Why use Puzzone
Factors and Area, Disguised
Each clue is a number that has to become a rectangle, so solvers reason about factor pairs without being handed an arithmetic worksheet.
Three Sizes
6×6 for a short solve or a young solver, 8×8 as the standard, 10×10 when you want a real one.
Built From a Real Partition
Every puzzle is cut from a valid set of rectangles, and a solver checks that the numbers allow exactly one way to divide the grid. The answer key shows it.
Free and Printable
Unlimited generation and no account. Free for personal and classroom use; Premium adds commercial rights and removes the watermark.
How it works
Choose a Size
Pick 6×6, 8×8 or 10×10.
Get Your Puzzle
A new set of numbers is ready at once and remade when you change the size; New puzzle makes another.
Print or Export
Download the PDF with the puzzle and its solution page.
Frequently asked questions
Divide the entire grid into rectangles. Every rectangle must contain exactly one of the given numbers, and its area in cells must equal that number. No cell is left out and no rectangles overlap.