Use this construction calculation for preliminary quantity, geometry, material, load, or coverage planning when dimensions and units have been measured consistently.

Thickness (in) (in)

Required number input.

Width (in) (in)

Required number input.

Length Feet

Required number input.

Calculate lumber volume in cubic feet from thickness and width in inches and length in feet; use actual dimensions when physical volume matters. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Volume (ft³) (ft³)

The resulting volume (ft³) returned as a number.

• Lumber calculations depend on actual dimensions, species, grade, moisture content, defects, treatment, orientation, and waste. Nominal size and average density are not substitutes for the specified product or structural grading.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Verify dimensions on site, use current product data and local code requirements, include an explicit waste or safety allowance where appropriate, and obtain qualified structural, electrical, plumbing, or geotechnical review when required.

• Board Feet

  Calculate lumber board feet from nominal or actual thickness and width in inches and length in feet: thickness×width×length/12.

• Concrete Volume

  Calculate rectangular concrete volume in cubic meters from length, width, and pour thickness measured in meters.

• Rectangular Excavation Volume

  Calculate in-place volume of a rectangular excavation from measured length, width, and depth.