Plywood / OSB Calculator — m to sheets, cost
How to use this calculator
Choose your area shape — Rectangle, L-Shape, or Custom Area. Select sheet size (standard 1220×2440 mm or 1250×2500, 1525×3050), panel thickness, and material. Adjust waste percentage for cuts and fitting.
Results include total sheets needed, coverage area, total weight, and optional cost. Currency is selectable (EUR, GBP, PLN, etc.) with space-separated thousands.
Saved Calculations
| Time | Shape | Area m² | Material | Thick | Sheets | Weight | Cost |
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How to Calculate Plywood and OSB Sheets (Metric)
This metric calculator estimates the number of plywood, OSB, or MDF sheets needed to cover a given area. Enter dimensions in meters, centimeters, or millimeters for a rectangle, L-shape, or custom area. The calculator divides total area (plus waste allowance) by the sheet area.
Standard Metric Sheet Sizes
The most common sheet size in Europe is 1220×2440 mm (2.98 m²), equivalent to the 4×8 ft imperial standard. Larger panels at 1250×2500 and 1525×3050 mm are also available. Common thicknesses: 9 mm (backing), 12 mm (walls), 15 mm (subfloor), 18 mm (structural subfloor/sheathing), 21-27 mm (heavy-duty).
Material Weight per Sheet
A standard 1220×2440 mm, 18 mm thick sheet weighs approximately: plywood 25-30 kg, OSB 28-33 kg, MDF 38-44 kg. Density: plywood ~550 kg/m³, OSB ~600 kg/m³, MDF ~750 kg/m³.
