Free Lumber Calculator – Board Count & Board Feet
Free lumber calculator for deck boards, wall framing studs, and fencing. Calculate number of boards, board feet, and estimated cost for any lumber project.
Lumber Calculator Guide
The Lumber Calculator estimates the number of boards and board feet needed for decks, wall framing, and fencing projects. Select your project type and enter dimensions to get an accurate material count.
For deck boards, enter the deck area and board dimensions. The gap between boards (typically 1/4 inch) affects how many boards you need. For framing, studs are typically spaced 16 or 24 inches on-center — 16 inch spacing is stronger and preferred for load-bearing walls.
Board feet (BF) is a volume measurement used for lumber: 1 BF = 1 inch thick × 12 inches wide × 12 inches long. Use board feet to compare lumber prices and estimate total wood volume. Always add 10–15% extra for cuts, defects, and mistakes.