Free woodworking & DIY project calculators
Plan a deck, a fence, a floor or a cabinet job and get the exact quantities — boards, sheets, bags, boxes and screws — before you drive to the lumber yard. Every tool accounts for real (milled) lumber dimensions and a sensible waste factor.
Calculators
- Board foot calculatorSizes, quantities & cost
- Deck boards calculatorSizes, quantities & cost
- Plywood sheets calculatorSizes, quantities & cost
- Wall studs calculatorSizes, quantities & cost
- Joist span calculatorSizes, quantities & cost
- Deck cost calculatorSizes, quantities & cost
- Hardwood flooring calculatorSizes, quantities & cost
- Paint coverage calculatorSizes, quantities & cost
- Fence material calculatorSizes, quantities & cost
- Roof pitch calculatorSizes, quantities & cost
- Rafter length calculatorSizes, quantities & cost
- Stair stringer calculatorSizes, quantities & cost
- Lumber waste calculatorSizes, quantities & cost
- Full deck bundle calculatorSizes, quantities & cost
- Nominal vs actual calculatorSizes, quantities & cost
- BF → sq ft calculatorSizes, quantities & cost
- Miter angle calculatorSizes, quantities & cost
- Dowel spacing calculatorSizes, quantities & cost
- Screw quantity calculatorSizes, quantities & cost
- Hardwood yield calculatorSizes, quantities & cost
- Firewood cords calculatorSizes, quantities & cost
- Dust collection calculatorSizes, quantities & cost
Charts & reference
Guides
- How to calculate board feet
- Nominal vs actual lumber
- How much lumber waste
- Deck planning basics
- Plan a deck frame
- Plywood sizes explained
- Choosing hardwood flooring
- Paint coverage rates
- Fence post spacing
- Roof pitch & rafters
- Stair rise and run code
- Beginner woodworking tools
- Best cordless drills
- Best table saws
- Best orbital sanders
- Best home workbenches
- Best wood stains
- Best pocket hole jigs
- Best dowels
- Best wood screws
Why the numbers differ from the lumber tag
Most estimating mistakes come from one thing: a “1×6” board is actually ¾ in × 5⅝ in, and a “2×4” is 1½ in × 3½ in. Every WoodCalc tool uses actual milled dimensions by default and shows you what the nominal answer would have been, so you can see the size of the error before it costs you a second trip.