Plywood Core Species & Blend Density
Compare planning densities for single-species cores, then mix species by share (%) or any relative weights (30 + 70 gives the same blend as 3 + 7). The result is a volume-weighted average density — useful for CBM, weight and container estimates before you have a mill COA.
Core species reference
Planning defaults (kg/m³) for export-style hardwood and softwood cores. Confirm every order against supplier certificates.
Blend density calculator
Enter two or more species with positive shares. Shares don't need to sum to 100 — only the ratio matters. Use “Normalize to 100%” to rewrite rows as percentages for documentation.
| Species | Share | ρ (kg/m³) |
|---|
How blended core density works
A blended core layers veneers from two or more wood species. The effective density is the volume-weighted average of the component species — each species' density multiplied by its volume share, summed, then divided by the total share.
The formula
ρ_blend = Σ(sharei × ρi) ÷ Σ(sharei). Example: 50% Acacia (580) + 50% Eucalyptus (650) = (50×580 + 50×650) ÷ 100 = 615 kg/m³.
Why core species matters
Core species drives weight (shipping cost per container), density (structural strength) and price. Eucalyptus is heavier and stronger but fits fewer sheets per container; styrax and pine are lighter, allowing more volume per shipment at lower density. Rubberwood (Hevea) sits in the middle — a stable, plantation-grown furniture and joinery core.