Board Footage Calculator
Calculate the total board feet of lumber based on dimensions and quantity.
Published by:
isCalculator Editorial Team
Reviewed by:
Review Board
Last Updated:
Was this calculator helpful?
How to use this tool?
Board Footage Calculator – Quick Guide
- Enter Thickness (in inches) – e.g., 1.5 for 1½″ lumber.
- Enter Width (in inches) – e.g., 5.5 for a 2×6 actual width.
- Enter Length (in feet) – e.g., 8 for an 8-foot board.
- Enter Quantity (number of identical pieces) – defaults to 1.
- Click Calculate Board Feet. Invalid inputs show red warnings.
- Result displays total board feet using the formula:
(Thickness × Width × Length × Quantity) ÷ 12.
All dimensions must be in imperial units (inches for thickness/width, feet for length).
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
A board foot is a unit of volume for lumber, equal to 1 inch thick by 12 inches wide by 1 foot long.
Board feet = (Thickness in inches × Width in inches × Length in feet × Quantity) / 12.
Yes, you can use decimal values for thickness, width, and length (e.g., 1.5 inches, 5.5 inches).
