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Flooring Calculator
m
m
m²
Flooring Calculation Formula
Room Area: Length × Width
Total with Waste: Area × (1 + Waste% / 100)
Boxes Required: ceil(Total / Coverage per Box)
Total with Waste: Area × (1 + Waste% / 100)
Boxes Required: ceil(Total / Coverage per Box)
Flooring Calculator — How Much Flooring Do I Need?
Australian homeowners spend an average of $4,200 on flooring per renovation (Houzz Australia, 2024). This calculator determines the exact square metres of flooring required, including wastage allowances for different laying patterns.
Wastage by Pattern
| Pattern | Wastage % | Reason |
|---|---|---|
| Straight / Brick Bond | 5–7% | End cuts only |
| Diagonal (45°) | 10–15% | Angled perimeter cuts |
| Herringbone / Chevron | 15–20% | Complex angled cuts |
Formula
Total Flooring = Room Area (m²) × (1 + Wastage %). Divide by coverage per box and round up.
Frequently Asked Questions
How do I calculate flooring for a room?
Length × Width = m². Add wastage (5–10% standard, 15–20% herringbone). E.g., 5m × 4m = 20m² + 10% = 22m².
How many boxes of flooring do I need?
Divide total area by coverage per box (typically 1.5–2.5m²) and round up.
What wastage for herringbone?
15–20%. The angled cuts at borders create more waste than straight laying.
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