Free Woodworking Calculators | Popular Woodworking Plans

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Project cost estimator

Total material cost for your project

Lumber ($)

Hardware ($)

Finish ($)

Misc ($)

Total estimated cost$0.00

Board feet calculator

Lumber volume — 1 BF = 12″ × 12″ × 1″

Thickness (in)

Width (in)

Length (ft)

Board feet4.00

Equal spacing calculator

Space between balusters, slats, spindles

Total length (in)

Number of items

Width of each item (in)

Gap between each item5.250″

Shelf sag estimator

Estimated deflection under load

Shelf span (in)

Shelf depth (in)

Thickness (in)

Load (lbs)

Estimated sag0.0000″

Sheet good yield

Max pieces from a sheet of plywood

Sheet width (in)

Sheet length (in)

Piece width (in)

Piece length (in)

Max pieces from sheet16

Right angle (diagonal)

A² + B² = C² — check for square

Side A (in)

Side B (in)

Diagonal (side C)5.000″

Golden ratio

Pleasing proportions for furniture design

Shorter side (A)

Longer side (B)

Total (A + B)261.8

Wood movement

Expansion and contraction by species

Wood species

Board width (in)

Moisture change (%)

Predicted movement0.210″

Coefficients based on USDA Forest Products Laboratory data. Values are approximate.

Finish estimator

Paint, poly, or stain coverage needed

Surface area (sq ft)

Number of coats

Coverage per quart (sq ft)

Finish needed1.00 qts

Polygon miter angle

Correct miter for multi-sided shapes

Number of sides

Miter angle (each piece)

30.0°

Corner angle

60.0°

Stair stringer

Riser height and tread depth

Total rise (in)

Total run (in)

Number of risers

Riser height / Tread

8.0″ / 10.0″

Arch radius

Radius needed to draw a smooth arch

Arch width / span (in)

Arch height / rise (in)

Required radius13.50″

Waste lumber cut calculator

Pieces per board, waste offcut, and visual cut layout

Board length (in)

Piece length (in)

Blade kerf (in)

Pieces from board

Waste offcut

5.375″

Waste %

5.6%

Cut layout — top view of board

Usable piece

Kerf (blade width)

Waste offcut

Recommended resources

Tools and guides trusted by woodworkers at every skill level.

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The ultimate pricing guide for woodworkers

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20 woodworking tricks the pros use

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This page contains affiliate links. We may earn a small commission if you purchase through our links, at no extra cost to you. All calculators are provided for estimation purposes only — always verify measurements before cutting.