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Lumber Weight Calculator — Board Dimensions, Board Feet, Density & Load

Editable live calculator

Change any input — the result updates immediately

No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Starting measurement Actual thickness (in) Actual width (in) Board length (ft) Number of identical boards Wood density (lb/ft³) Use a sourced or measured density for the actual wood condition.Price per board foot (optional)

Calculated result

99.2 lb · 45 kg

Total board feet: 35 BF

Total solid volume: 2.917 ft³

Density used: 34 lb/ft³

Optional price per board foot not entered.

Show the working

1. Board feet = 1.5 × 3.5 × 8 × 10 ÷ 12 = 35 BF.
2. Weight = 2.9167 ft³ × 34 lb/ft³ = 99.17 lb.
3. Kilograms = 99.17 × 0.45359237 = 44.98 kg.

Density is the dominant assumption and varies with species, moisture and individual boards. For critical transport or load limits, use measured weights or authoritative material data.

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