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Free Lumber Calculator - Instantly Estimate Board Feet
Instantly estimate the total board feet needed for your lumber project. Includes expert tips, formulas, and answers to common questions.
Lumber Calculator
Enter your board dimensions and count to calculate total board feet needed.
How to Use the Lumber Calculator
Step-by-step guide to accurately calculate board feet for any project.
- Measure Each Board: Measure the length (ft), width (in), and thickness (in) of each board.
- Count Boards: Count the total number of boards needed.
- Enter Values: Input the length, width, thickness, and count into the calculator.
- Calculate: Click Calculate to see the total board feet needed.
Formula: (Thickness × Width × Length × Count) ÷ 12 = Board Feet
Quick Lumber Answers
Voice search and featured snippet optimized answers
How do I calculate board feet?
Multiply thickness × width × length (in feet) × count, then divide by 12.
What is the formula for board feet?
Board Feet = (Thickness × Width × Length × Count) ÷ 12
How much extra lumber should I buy?
Add 10% extra for waste and mistakes.
What is a board foot?
A board foot is a volume of wood measuring 1 in × 12 in × 12 in.
Lumber Tips
- Order extra lumber for waste and future repairs.
- Double-check your measurements for accuracy.
- Account for defects and knots in boards.
- Consult supplier for specific wood types and grades.
Frequently Asked Questions
How do I measure irregular boards?
Average the width and thickness, then use the calculator.
What if I have different board sizes?
Calculate each size separately and add together.
How do I convert board feet to cubic feet?
Divide total board feet by 12.