Puzzle Edge Piece Calculator

var totalPieces = puzzleWidth * puzzleHeight;\n var edgePieces = (puzzleWidth * 2) + ((puzzleHeight – 2) * 2);\n var cornerPieces = 4;\n var interiorPieces = totalPieces – edgePieces;\n\n if (puzzleWidth <= 0 || puzzleHeight <= 0) {\n displayResult('Please enter valid puzzle dimensions', 'error');\n return;\n }\n\n var resultText = 'Edge Pieces: ' + edgePieces;\n var breakdownText = 'Total Pieces: ' + totalPieces + '\\nEdge Pieces: ' + edgePieces + '\\nCorner Pieces: ' + cornerPieces + '\\nInterior Pieces: ' + interiorPieces;\n\n displayResult(resultText, 'success');\n document.getElementById('breakdown').value = breakdownText;\n}\n\nfunction displayResult(text, type) {\n var resultDiv = document.getElementById('result');\n resultDiv.textContent = text;\n resultDiv.style.color = type === 'error' ? '#dc3545' : '#28a745';\n}\n\nfunction copyToClipboard() {\n var breakdown = document.getElementById('breakdown').value;\n var textArea = document.createElement('textarea');\n textArea.value = breakdown;\n textArea.style.position = 'fixed';\n textArea.style.left = '-999999px';\n document.body.appendChild(textArea);\n textArea.select();\n try {\n document.execCommand('copy');\n alert('Results copied to clipboard!');\n } catch (err) {\n console.error('Failed to copy:', err);\n }\n document.body.removeChild(textArea);\n}\n\nfunction resetCalculator() {\n document.getElementById('puzzleWidth').value = 10;\n document.getElementById('puzzleHeight').value = 10;\n document.getElementById('result').textContent = 'Enter dimensions and click Calculate';\n}\n\nwindow.onload = function () {\n resetCalculator();\n};\n\n\n\n\n

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Calculate the number of edge, corner, and interior pieces in any rectangular puzzle

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\n \n \n Number of pieces along one dimension (e.g., width)\n

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\n \n \n Number of pieces along the other dimension (e.g., height)\n

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Breakdown by Piece Type

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Piece Type	Formula	Count
Total Pieces	Width × Height	–
Edge Pieces	(Width × 2) + ((Height – 2) × 2)	–
Corner Pieces	Fixed	–
Interior Pieces	Total – Edges – Corners	–

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Understanding Puzzle Pieces

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This calculator helps you determine the exact number of edge, corner, and interior pieces in any rectangular jigsaw puzzle. Understanding these counts is essential for strategy, especially in competitions or for sorting large puzzles.

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