Board Foot Calculator
Convert thickness, width, length, and piece count into board feet for lumber takeoffs. Free online; use the iPhone app for the same board-foot math in the yard or mill.
Board Foot Calculator
Board feet = thickness (in) × width (in) × length (ft) ÷ 12.
Total board feet
- Board feet / piece
- Total linear feet
- Total square feet
- Cubic feet
App screenshots
Real Board Foot Calculator screens from the App Store listing.
How to use this calculator
- Enter nominal or actual thickness and width in inches (or metric converted).
- Set length unit (typically feet for lumber).
- Quantity multiplies per-piece board feet for a cut list total.
Features
- Classic board-foot formula
- Quantity totals
- Linear and square footage
- Cubic volume outputs
- Offline iPhone workflow
Formula
Board feet per piece = thickness(in) × width(in) × length(ft) ÷ 12. Total = per piece × quantity.
1×6 × 8 ft, qty 10
At 1 in × 5.5 in × 8 ft, each piece is about 3.67 BF; ten pieces ≈ 36.7 BF total.
Practical notes
- Nominal vs actual dimensions affect takeoffs — measure what you will buy.
Take it to the job site
Use Board Foot Calculator on your iPhone for fast repeat calculations and the full native workflow — wherever you're working.
Related calculators
Related guides
- How to Calculate Board Feet — Use the classic lumber board-foot formula.
- Feet, Inches, and Fraction Math on the Job — Add and subtract construction measurements without decimal mistakes.
FAQ
Does this include kerf waste?
No. Add waste in your cut list or bump quantity for saw kerfs separately.
Pricing and grade rules vary by supplier — board feet here are geometric only.