Calculate balsa wood weight from length, width, height, or diameter and density, with results in lbs and kg for blocks, sheets, and rods.

Balsa Wood Weight Calculator

Basic
By Density (Block/Sheet)
Round Rod

Enter any 3 values to calculate the missing variable (Basic tab assumes a balsa density of 7.5 lb/ft³).

Balsa Wood Weight Formula

The following formula is used to calculate the balsa wood weight. Note: density varies by grade and moisture content; for a quick estimate you may use ρ = 7.5 lb/ft³ (≈120 kg/m³), but balsa commonly ranges about 6–18 lb/ft³ (≈95–290 kg/m³).

BWW = L × W × H ×

Variables:

  • BWW is the balsa wood weight (lb)
  • L is the balsa wood length (ft)
  • W is the balsa wood width (ft)
  • H is the balsa wood height/thickness (ft)
  • ρ is the balsa wood density (lb/ft³)

How to Calculate Balsa Wood Weight?

The following steps outline how to calculate the balsa wood weight.

  1. First, determine the balsa wood length (ft).
  2. Next, determine the balsa wood width (ft).
  3. Next, determine the balsa wood height/thickness (ft).
  4. Next, gather the formula from above: BWW = L × W × H × ρ.
  5. Finally, calculate the balsa wood weight.
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

balsa wood length (ft) = 10

balsa wood width (ft) = 12

balsa wood height (ft) = 1

BWW = L × W × H × 7.5 = 10 × 12 × 1 × 7.5 = 900 lb (≈ 408.23 kg)