Free tools
61 Calculators
Most popular
Board Foot & Lumber Cost
Calculate lumber volume and total material cost.
Cut List & Waste Optimizer
How many standard boards do you need?
Miter & Bevel Angles
Saw settings for frames and multi-sided boxes.
Pocket Hole Screw Selector
The right screw length and drill stop.
Shelf Sag Calculator
Will your shelf bow under books? Check before you build.
Wood Movement Calculator
Seasonal expansion of tabletops and panels by species.
Finish & Stain Coverage
How much stain, poly or oil to buy for your project.
Inch Fraction ↔ MM Converter
Tape-measure fractions to millimeters and back.
Lumber & materials
Plywood Sheet Calculator
How many sheets of plywood do your parts need?
Linear Feet & Cost Calculator
Total running length and cost of boards or molding.
Lumber Weight Calculator
Estimate the weight of boards by species.
Log Scale Calculator (Doyle, Scribner, International)
Board feet you can saw from a log.
Deck Board Calculator
Boards needed for a deck, with gaps.
Hardwood Flooring Calculator
Square footage and boxes of flooring to buy.
Fence Picket Calculator
How many pickets for a fence run?
Joinery & fasteners
Dovetail Spacing Calculator
Even tail and pin layout for hand-cut dovetails.
Dovetail Angle Calculator
Convert dovetail ratios to degrees.
Mortise & Tenon Size Calculator
Tenon thickness, shoulders and length.
Box Joint (Finger Joint) Calculator
Finger count and exact width for full fingers at both edges.
Dado & Rabbet Depth Calculator
Safe dado and rabbet depths for your stock.
Biscuit Size Calculator
Which biscuit (#0, #10, #20) for your stock.
Wood Screw Length Calculator
Right screw length for joining two boards.
Pilot Hole Size Calculator
Drill bit sizes for wood screws.
Nail Size (Penny) Calculator
Penny size and length for your board.
Geometry & layout
Arc Radius Calculator
Radius from the chord width and arc height.
Circle Calculator
Circumference and area for round tabletops.
Diagonal & Squareness Calculator
Check a carcass or frame for square.
Polygon Side Length Calculator
Side length for hexagons, octagons and more.
Hexagon Calculator
Across flats, across corners and area from side length.
Golden Ratio Calculator
Pleasing proportions for furniture design.
Equal Spacing Calculator (Balusters, Slats)
Even gaps between slats, spindles or pegs.
Shelf Spacing Calculator
Evenly space shelves inside a cabinet.
Taper Jig Angle Calculator
Angle for tapered table legs.
Segmented Bowl Ring Calculator
Segment angle and length for segmented turning.
Crown Molding Angle Calculator
Miter and bevel for cutting crown flat.
Stair Stringer Calculator
Riser height, tread count and stringer length.
Roof Pitch & Angle Calculator
Pitch, angle and slope from rise and run.
Rafter Length Calculator
Rafter length for a shed or gable roof.
Furniture & cabinets
Furniture Height Calculator (Ergonomics)
Seat, table, desk and workbench heights.
Bookshelf Capacity Calculator
How many books fit, and how much they weigh.
Drawer Box Size Calculator
Drawer box dimensions for side-mount slides.
Cabinet Door Size Calculator
Overlay door sizes for single and double doors.
Face Frame Calculator
Stile and rail cut lengths for cabinet face frames.
Picture Frame Cut Calculator
Molding cut lengths for any artwork and mat.
Finishing & moisture
Epoxy Resin Calculator
How much epoxy for a river table or pour.
Wood Glue Calculator
How much glue for a panel glue-up.
Sandpaper Grit Sequence Calculator
Which grits to use, in order.
Equilibrium Moisture Content Calculator
What moisture content wood will settle at in your shop.
Wood Moisture Content Calculator (Oven-Dry)
Moisture content from wet and oven-dry weight.
Machines & tooling
Router Bit Speed Calculator
Maximum safe RPM by bit diameter.
Saw Blade Rim Speed Calculator
Tip speed of a saw blade or sanding disc.
Pulley Speed Calculator
Output RPM from motor speed and pulley sizes.
Band Saw Blade Length Calculator
Blade length from wheel size and center distance.
Band Saw Blade Radius Calculator
Tightest curve each blade width can cut.
CNC Feed Rate Calculator
Feed rate from RPM, flutes and chip load.
Lathe Speed Calculator
Safe turning RPM by blank diameter.
Dust Collection CFM Calculator
Airflow and duct size per machine.
Shop business
Woodworking Project Pricing Calculator
Price custom furniture with labor, overhead and profit.
Woodworker Hourly Rate Calculator
What to charge per hour to hit your income goal.
Markup & Margin Calculator
Turn a cost and target margin into a selling price.
Power Tool Electricity Cost Calculator
What your machines cost to run.