How does the Lumber Calculator work?

List each member type (e.g., 2×4 studs, 2×6 joists, 4×4 posts) Then: Calculate length per member × number of members Then: Convert to board feet or linear metres for pricing Then: Add 10% for waste, cuts, and miscuts.

Can you give an example of how to use the Lumber Calculator?

Example: Input 25 studs at 2.4m · 15 joists at 3.6m · 10×10 post timber gives a result of Total linear metres by member type + 10% waste (Price varies by species and treatment).

Is the Lumber Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Lumber Calculator?

Our Lumber Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Lumber Calculator

Structure length (m)

Structure width (m)

Height (m)

Stud spacing (m)

Cost per meter (£)

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.

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Pro Tip

Pressure-treated timber is essential for any application that may contact soil or moisture. Using untreated wood in ground contact leads to rapid rot — a common and expensive DIY mistake.

References

›Lumber — Wikipedia

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