Board Foot Lumber Calculator

Board Foot Lumber Calculator helps you price and plan lumber fast - for a single board or a whole project list.

Use this board foot calculator to turn thickness, width, and length into board feet and cost, using the standard lumber-industry formula, shown right on screen so you can check the math.

QUICK BOARD FOOT
• Enter thickness as lumber "quarters" (4/4, 5/4, 6/4, 8/4, 10/4, 12/4, 16/4) or as decimal inches
• Enter width in inches and length in feet or inches
• Set quantity and an optional price per board foot
• See board feet per piece, total board feet, and total cost instantly
• Formula shown on screen for trust: bf = (thickness x width x length) / 12 (or / 144 for length in inches)

LUMBER LIST
• Build a running project list of species, dimensions, quantity, and price
• Track running totals for board feet and cost as you add items
• Edit or delete any line item
• List is saved on your device between sessions
• Export a formatted summary to share or paste into an estimate

CONVERTER
• Convert linear feet to board feet (and back) for a given cross-section
• Convert cost per linear foot to cost per board foot (and back)
• Useful when a supplier quotes by the linear foot instead of the board foot

SIZE REFERENCE
• Nominal vs. actual (dressed) sizes for common softwood boards and dimensional lumber
• Hardwood "quarters" explainer - how rough-sawn thickness relates to surfaced (S4S) thickness
• Quick lookup chart for hardwood quarters to approximate surfaced thickness

BUILT FOR REAL LUMBER YARD AND SHOP WORK
• Fast entry with minimal taps
• Works offline at the yard, in the shop, or on a job site
• No account required
• Your lumber list stays on your device

This app is ad-supported. Board foot math and the reference charts are available to use; watching a short ad unlocks exporting your lumber list.

If you need a reliable board foot calculator for hardwood, softwood, or a full lumber project list, this app gives you the numbers fast.