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

Density Kg Per M3 (kg/m³)

Required number input.

Weight of one US board foot of lumber from density in kilograms per cubic meter; one board foot is exactly 1/12 cubic foot. 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]

Kilograms Per Board Foot (kg/BF)

The resulting kilograms per board foot 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.

• Concrete Cement Content

  Calculate cement content as cement mass divided by yielded concrete volume in kilograms per cubic meter.

• Lumber Cost Per Board Foot

  Calculate lumber price per board foot from total lumber cost and the board-foot quantity priced on the same nominal or actual dimension basis.

• Rebar Weight Per Foot

  Compute steel reinforcing-bar mass per foot from nominal circular diameter and supplied steel density.