Free Online Tool
Glulam Weight Calculator
Accurately calculate the weight of glued laminated timber (glulam) beams based on dimensions, wood species, and quantity. Instant results as you type.
Beam Dimensions
Results
Enter beam dimensions to see results instantly.
How to Use the Glulam Weight Calculator
1
Select Wood Species
Choose the glulam wood species or enter a custom density in lbs/ft³.
2
Enter Dimensions
Enter the beam length, width, and depth. Choose a standard size or enter custom values.
3
View Results
Results appear automatically — total weight, weight per foot, volume, and species comparison chart.
Weight (lbs) = Length (ft) × Width (ft) × Depth (ft) × Density (lbs/ft³)
The formula calculates the volume of the rectangular beam in cubic feet, then multiplies by the wood density. Standard glulam densities range from ~28 to 44 lbs/ft³ depending on the wood species used.
Example: A 20 ft long Douglas Fir-Larch beam at 5-1/8" × 12" (standard size):
- Convert width: 5.125 in ÷ 12 = 0.4271 ft
- Convert depth: 12 in ÷ 12 = 1.0 ft
- Volume = 20 × 0.4271 × 1.0 = 8.542 ft³
- Weight = 8.542 × 34 = 290.42 lbs
- Glulam densities can vary based on moisture content — the values used here assume ~12% moisture (standard for construction).
- For the most accurate results, check the manufacturer's spec sheet for the exact density of your glulam product.
- Common US standard widths are 3-1/8", 5-1/8", 6-3/4", 8-3/4", and 10-3/4".
- Depths increment in 1-1/2" lamination layers (e.g., 6", 7-1/2", 9", 10-1/2", etc.).
- This calculator provides estimated weights for planning and logistics — always verify with your supplier for structural applications.
