Wood Volume Calculator (Sawn Timber)

Quality Inspector

Estimate the volume of rectangular wood members like planks, beams, and rafters.

📐 Formula & Method

Volume = Length × Width × Thickness × Quantity. Standard conversion: 1 m³ = 35.3147 CFT.

Volume = L × W × T × Qty

5 rafters of 10ft x 4" x 2":
• Total Volume = 5 × 120" × 4" × 2" = 4800 in³
• Volume ≈ 2.78 CFT

What is a CFT in wood?

CFT stands for Cubic Feet. It is the most common unit for buying timber in many regions.

Should I measure in inches or feet?

You can choose your preferred unit in the input. For thick planks, width and thickness are often measured in inches while length is in feet.