Free · Material quantities

Timber Piece Volume & Weight Calculator

Estimate individual and total timber mass using actual dimensions and wood density.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

A solid timber cube with 0.3048-meter sides occupies one cubic foot. At a custom density of 16 lb/ft³, one piece has a mass of 7.25747792 kg; two pieces have a combined mass of 14.51495584 kg.

Piece volume = length × width × thickness; piece mass = volume × density; total mass = piece mass × quantity

Worked example

Enter these known values and leave the other values blank.

Type of wood
Enter a custom wood density
Density
16 lb/cu ft
Actual piece length
0.3048 m
Actual piece width
0.3048 m
Actual piece thickness
0.3048 m
Piece quantity
2
Total mass
14.515 kg
Mass per piece
7.257 kg
Total volume
0.05663 m³
Volume of a beam/plank
0.028317 m³

Assumptions and limitations

  • All pieces share dimensions and density. Quantity scales the result directly; fractional entries represent equivalent portions of a piece.
  • Dimensions, density and quantity must be positive. The model reports mass; it does not assess lifting or load limits.

Common questions

Which wood density should I use?

Species presets are approximate values. Moisture, treatment and natural variation affect density. Choose the custom option to enter a measured or supplier density for the timber's current condition. Check the density unit beside the field.

Should I enter nominal board dimensions?

Use actual measured dimensions. Nominal trade sizes can differ from finished dimensions. The model treats each piece as a solid rectangular prism and does not subtract notches, holes or defects, or determine structural capacity.

References

Bookify uses exact customary mass and volume definitions for density units, replacing rounded factors in the reference. Bookify replaces the captured rounded US gallon with the exact 3.785411784-liter definition.

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