01 / METHOD
How to use this calculator
- Enter actual or nominal thickness and width in inches.
- Enter the length in feet and the number of matching boards.
- Optionally add a price per board foot to estimate cost.
02 / APPLICATION
Useful in the workshop
- Price a stack of identical boards
- Check a lumberyard tally
- Estimate material for a small project
03 / MODEL
Assumptions
- One board foot equals 144 cubic inches.
- Dimensions describe rectangular stock and quantity is a whole number.
- Cost is board feet multiplied by the entered unit price.
04 / CHECKS
Limitations and safety
- Does not account for waste, defects, tax, or milling loss.
- Some suppliers tally nominal rather than measured dimensions; confirm their method.
Before cutting: independently verify important dimensions, angles, clearances, material behavior, and machine settings. Use safe procedures appropriate to your tools and material.
05 / QUESTIONS
Frequently asked questions
What is the board-foot formula?
Thickness in inches × width in inches × length in feet ÷ 12, multiplied by quantity.
Should I use nominal or actual size?
Use the dimensions your supplier uses for billing. Rough lumber is often tallied by nominal thickness.
Can I calculate one short board?
Yes. Enter a decimal length in feet, such as 2.5 for 30 inches.