About this calculator
Enter thickness and width in inches and length in feet.
How to use it
- Enter the size of a piece.
- Enter the number of pieces.
- Optionally enter the price per CFT.
The formula
Board feet = thickness (in) × width (in) × length (ft) ÷ 12; CFT = board feet ÷ 12
- 1 CFT
- 12 board feet
Worked example
Ten pieces of 2 × 6 inch timber, 10 ft long
- Board feet = 2 × 6 × 10 ÷ 12 × 10 = 100.
- CFT = 100 ÷ 12 = 8.33; at ₹2,500 per CFT, ₹20,833.
What the result means
Sawn timber shrinks as it dries; buy a little extra.
Assumptions
- Nominal sizes.
Limitations
- Dressed sizes can be slightly smaller than nominal.
Frequently asked questions
How do I calculate CFT of wood?
Length (ft) × width (in) × thickness (in) ÷ 144.
What is a board foot?
A piece 1 ft × 1 ft × 1 in.
How many board feet in a cubic foot?
12.
Last reviewed on 3 October 2026. Found a mistake? Tell us.