How to Calculate Lumber
What is Lumber?
A lumber calculator estimates the quantity and cost of timber needed for construction projects — framing, decking, fencing, or furniture — based on dimensions and member count.
Step-by-Step Guide
- 1List each member type (e.g., 2×4 studs, 2×6 joists, 4×4 posts)
- 2Calculate length per member × number of members
- 3Convert to board feet or linear metres for pricing
- 4Add 10% for waste, cuts, and miscuts
Worked Examples
Input
25 studs at 2.4m · 15 joists at 3.6m · 10×10 post timber
Result
Total linear metres by member type + 10% waste
Price varies by species and treatment
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