Lumber cubic metre calculator

Add several board sizes and quantities to get the total volume in cubic metres.

Your measurements

Decimals and fractions such as 1.5, 1½ or 1 1/2 are accepted. Do not use thousands separators.

Example calculation

Lumber cubic metre calculator: worked out from the values already filled in the form above.

Inputs

Result

How the calculation works

Enter all three dimensions in the selected unit. Millimetres are converted to cubic metres by dividing the multiplied dimensions by one billion. Use a separate row for each size; quantities must be whole pieces.

Example: 25 × 150 × 2400 mm is 0.009 m³ per board. Twenty boards contain 0.18 m³. A 15% allowance gives a buying estimate of 0.207 m³. Confirm how your supplier rounds an order before purchasing.

m³ = thickness (mm) × width (mm) × length (mm) ÷ 1,000,000,000

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