Materials
Timber volume & linear metres
- where
- total length (m)
- pieces
- length per piece (m)
- volume (m³)
- width (mm)
- thickness (mm)
Explain this equation
Totals a batch of rectangular timber as linear metres and as cubic metres. Use it for ordering, pricing or estimating weight.
n is the number of pieces and l the length of each, in metres, giving the total length Lt. w and t are the width and thickness of the section in millimetres. V is the volume in m³.
Total length is simply count times length. Volume is length times cross-section. Because w and t are in millimetres, their product is in mm², and dividing by 1,000,000 converts it to m² so the volume comes out in m³.
Ten 4.8 m lengths of 145 × 47 are 48 m, about 0.327 m³. Halving the thickness halves the volume.
Watch out: use the actual finished section for installed volume. Ordered sawn sizes are often larger.
Calculate a batch of rectangular timber using actual finished section sizes.
Enter your values to see the result.
Good to know
Lengths in metres, section in mm. Use finished dimensions for installed volume; ordered rough sizes may differ.
Sources
- Geometry / arithmetic
This is a calculation aid, not a structural design or compliance certificate. Every default is an example, not a specification for your project.