Material: Clear Glass
Thickness: 1/4"
Edge Work: Flat Polish
Glass Strength: Tempered Glass
Temper Mark: No Temper Mark
Center Hole: Absent
All Corners Settings: Eased
Example 1: Round 41″ diameter, ¼″ tempered, flat polish
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Area = π × r² = 3.1416 × (20.5²) ≈ 1,320 in²
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1 sq ft = 144 in² → 9.17 sq ft
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Price = $230.99 ÷ 9.17 ≈ $25.20 per sq ft
Example 2: Rectangle 48″ × 20″, ¼″ tempered, pencil polish
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Area = 48 × 20 = 960 in²
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960 ÷ 144 = 6.67 sq ft
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Price = $205.46 ÷ 6.67 ≈ $30.80 per sq ft
Your Octagon (13″ diameter, ¼″ tempered, flat polish, eased corners)
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Area ≈ 136 in² ≈ 0.95 sq ft
Using those per-sq-ft rates:
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At $25.20/sq ft → 0.95 × $25.20 ≈ $23.90
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At $30.80/sq ft → 0.95 × $30.80 ≈ $29.30
Reality Check
Because your piece is small (under 1 sq ft), the vendor almost certainly won’t bill only $25–$30. They’ll apply:
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Minimum order pricing (likely around $150–$250, based on the quotes you got).
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Possibly a shape upcharge (octagons are more work than rounds/rectangles).
So your octagon is realistically going to come in closer to $150–$200 total, even though the raw material math says ~$25–30.