Lumber Weight Calculator
Estimate the mass of identical rectangular boards from actual dimensions, quantity and wood density.
Formula
mass = length × width × thickness × count × density
Board length: 8 ft · Actual width: 4 in · Actual thickness: 1 in · Wood density (example): 30 lb/ft³ · Total volume ≈ (8 ft × 0.3048 m/ft)×(4 in × 0.0254 m/in)×(1 in × 0.0254 m/in)×(10) · Total mass ≈ (0.06292632576)×(30 lb/ft³ × 16.01846337 kg/m³/lb/ft³) · Pounds ≈ (30.23949133)÷0.45359237
How to use
- Measure actual board dimensions.
- Enter count and density at the wood’s moisture condition.
- Read total volume and mass.
Examples
- Ten 2 m × 10 cm × 2 cm boards at 500 kg/m³ weigh 20 kg.
Frequently asked questions
Can I enter nominal sizes?
Use actual measured dimensions; a nominal size can differ from the finished board.
Which density is right?
Use species and moisture-specific supplier data. The shown density is only an example.
Does this estimate strength?
No. Mass does not determine structural capacity or allowable loading.
Sources
Updated: