Every result is computed in your browser and checked against published references. Found a discrepancy? Write to us — corrections ship fast.
Design your own
Shelving & Structure1 tool
Woodturning2 tools
Boards & Panels6 tools
Board Foot CalculatorPopularThickness × width × length to board feet, with 4/4–8/4 presets, piece counts, cost — and a live 3D board preview.Wood Movement CalculatorSeasonal expansion and shrinkage by species, grain orientation, and moisture swing — FPL data, gap guidance included.Epoxy Pour CalculatorRiver-table and mold volume in ounces and liters, with waste allowance, A/B mix split, and a deep-pour depth check.End Grain Cutting Board CalculatorStrips to rip, slices to cut, and board feet to buy — with a live checkerboard preview of your pattern.Kerf Bending CalculatorKerf count, spacing, and cut depth for any bend — real geometry, live diagram.Plywood Cut List OptimizerPopularPack your parts onto 4×8 or 5×5 sheets — kerf and grain direction handled, with sheet count, waste %, and a to-scale cutting diagram per sheet.
Shop Reference6 tools
Wood Weight CalculatorSpecies density × your dimensions = pounds and kilograms, with board feet alongside and a 3D preview to scale.Bandsaw Blade Length CalculatorWheel sizes and center distance in, blade length out — with ordering advice.Wood Screw Pilot Hole ChartPilot, clearance, and hardwood/softwood sizes by screw gauge — fractional or metric.Firewood Cord CalculatorStack size to cords, with an effective price-per-cord check for buying season.Router Bit Speed ChartEnter a bit diameter, get the safe max RPM — with the full reference table.Janka Hardness ChartPopularSortable, searchable hardness ratings for 55+ species, in lbf or newtons.
Carpentry & Trim3 tools
Crown Molding Angle CalculatorSpring angle + your actual corner = miter and bevel for cutting crown flat.Compound Miter CalculatorSides and slope in — miter and bevel angles out, in degrees from square, with the miter-gauge setting for sloped-side boxes and frames.Stair Stringer CalculatorTotal rise to full layout: risers, treads, run, stringer length, comfort check.
Built like a good jig
Every tool here shows its formula and cites its sources — mostly the U.S. Forest Products Laboratory’s Wood Handbook and standard machining references. Results are verified against independent hand calculations before they ship, and if a number matters for safety, we say so. Found an error? Tell us and we’ll fix it.