Board foot calculator
Lumber is sold by volume, not length. Enter each board’s dimensions below and this tool works out total board feet and total cost as you type. Nothing leaves your browser.
| Species | Thick (in) | Width (in) | Length (in) | Qty | $ / bd ft | Board feet |
|---|
Total board feet
0.00 bf
With waste allowance
0.00 bf
Estimated cost
$0.00
How this is calculated
Each board’s feet come from (thickness × width × length) ÷ 144, since one board foot equals 144 cubic inches: a piece 1″ thick, 12″ wide, and 12″ long.
That figure is multiplied by quantity for each row, then all rows are summed. The waste allowance adds a percentage on top to cover cutoffs and defects. Cost is board feet (with waste) × price per board foot, per row, summed.