Timber weight calculator
Species, sizes, pieces and moisture content: you get total weight, weight per piece and density at that moisture — for loading, hauling or lifting.
Total weight
218.4 kg
- Total weight218.4 kg
- Weight per piece21.84 kg
- Wood volume0.42 m³
- Density at that moisture520 kg/m³
Your prices per language/currency. Used when you enable “Use my prices” in calculators. My prices →
How it's calculated (visible formula)
ρ = ρ12 × (1 + moisture) ÷ 1.12; weight = thickness × width × length × pieces × ρ
- Net geometric measurement, no waste.
- Adjustable waste % for cuts and breakage.
- Purchase rounded up to sellable units (boxes, bags, buckets, boards).
How to calculate it, step by step
- Choose the species.
- Measure thickness, width, length and number of pieces.
- Enter moisture (12% air-dried; 30%+ green).
- Compute volume and apply density at that moisture.
- Add hardware or treatment weight if it matters for lifting.
Average density at 12% moisture
| Species | kg/m³ (lb/ft³) |
|---|---|
| Pine | 520 (32) |
| Spruce / fir | 450 (28) |
| Oak | 700 (44) |
| Beech | 710 (44) |
| Eucalyptus | 800 (50) |
| Iroko | 650 (41) |
Worked example: 10 pine beams 3 × 6 in × 13 ft at 12%
- ≈ 0.42 m³
- 0.42 × 520 kg/m³ = 218 kg
→ About 480 lb total, 48 lb per piece.
Common mistakes
- Using dry density for green lumber.
- Forgetting hardware and treatment weight.
- Confusing bulk density with cell-wall density.
Pro tips
- Use a pin moisture meter to refine the estimate.
- Plan lifts with margin — green wood can weigh 60% more.
- Check van or trailer payload.
- Spread stacked lumber on floors to avoid overloading.
From calculation to quote
Add labour, overhead and your margin, and generate the professional PDF.
FAQs
- How much does a cubic foot of pine weigh?
- About 32–35 lb air-dried; green it can exceed 50 lb.
- What moisture is dry lumber?
- Air-dried 12–15%; kiln-dried 8–12%.
- Which species here is heaviest?
- Eucalyptus, then hardwoods like oak and beech.
- How much does a 4×8 pine beam weigh per foot?
- Roughly 7–8 lb per foot air-dried.
- Which wood is lightest?
- Spruce, fir and pine; hardwoods like oak and beech weigh much more.
- How does moisture affect weight?
- Above about 30% (fiber saturation) weight rises almost in step with water content.
Sources and standards
Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.