Construction
Header Lumber Volume Calculator
Calculate board feet of dimensional lumber used in a multi-ply header.
- Free to use
- Runs in your browser
- Level B · Industry formula
- Last reviewed 2026-08-16
Calculator guide
How to use the Header Lumber Volume Calculator
Calculate board feet of dimensional lumber used in a multi-ply header. Enter the requested values and select Calculate. The result and supporting values are produced locally in your browser.
Formula
Worked example
A two-ply header using 1.5 × 9.25 inch lumber over 6 ft contains 13.875 board feet of wood.
What to keep in mind
- This measures wood volume only; it does not size a structural header.
- Header sizing depends on span, loads, species/grade, bearing, and code or engineered design.
Methodology
This calculator uses deterministic arithmetic and performs the calculation locally in your browser. Verify assumptions, units, and source values for your specific use case.
Review standard: Level B · Industry formula. How calculator reviews work.
Frequently asked questions
What does this calculator calculate?
Calculate board feet of dimensional lumber used in a multi-ply header.
How is the result calculated?
Board Feet = Thickness (in) × Width (in) × Length (ft) × Plies ÷ 12.
Can I use the result for an important decision?
Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.
Does CalculateMeasure store the values I enter?
The calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.