フローリング用量・費用計算機
Room length メートル(m)
Room width メートル(m)
Deduct area m²
Layout pattern
Waste %
Plank length ミリメートル(mm)
Plank width ミリメートル(mm)
Pieces per box pcs
Flooring price ¥/m²
Install price ¥/m²
Underlay price ¥/m²
Net area: -
Buy area: -
Pieces needed: -
Boxes needed: -
Material cost: -
Install cost: -
Underlay cost: -
Total cost: -
Tips: -
Flooring Cost Calculator
Estimate net/buy area, piece count, boxes, and material / install / underlay costs from room size, layout waste and plank specs.
How to use
- Enter room length & width; deduct non-floor areas if any
- Pick a layout (straight / diagonal / herringbone / parquet) or set waste %
- Enter plank size, pcs per box, and optional unit prices
Formulas
- Net area = L × W − deduct
- Buy area = net × (1 + waste%)
- Pieces = ceil(buy area ÷ plank area); boxes = ceil(pieces ÷ pcs/box)
Typical waste: straight 3–5%, diagonal ~8%, herringbone ~10%. Buy from the same dye lot; calculations run locally in your browser.