Lumber Calculator
Calculate lumber quantities, board feet, and costs for construction and woodworking projects
Framing Project
Materials Needed
Decking Project
Decking Materials
Board Feet Calculator
Board Feet Results
Wall Studs Calculator
Stud Count
Board Feet Formula
Board feet is a volume measurement for lumber
Where: Thickness and Width are in inches, Length is in feet
Common Lumber Sizes & Prices
Uses: Framing, studs
Lengths: 8', 10', 12', 16'
Uses: Joists, rafters
Lengths: 8', 10', 12', 16'
Uses: Floor joists, beams
Lengths: 8', 10', 12', 16'
Uses: Floor joists, headers
Lengths: 8', 10', 12', 16'
Uses: Large spans, beams
Lengths: 8', 10', 12', 16'
Treatment: Ground contact rated
Premium: 20-40% over regular
Lumber Selection & Tips
📏 Actual vs Nominal
Lumber dimensions are nominal. A 2x4 actually measures 1.5" × 3.5". Always use actual dimensions for calculations.
🌲 Wood Species
SPF (Spruce-Pine-Fir) is most common for framing. Southern Pine and Douglas Fir are stronger but cost more.
💧 Moisture Content
Kiln-dried (KD) lumber is more stable but costs 10-15% more. Green lumber shrinks as it dries.
📊 Lumber Grades
Stud grade is sufficient for most framing. Construction grade has fewer defects but costs more.
📦 Ordering Tips
Order 10% extra for waste. Buy from the same lot when possible to ensure consistent color and grain.
🏪 Cost Savings
Bulk purchasing, off-season buying, and shopping multiple suppliers can save 20-30% on costs.