Shop math, without the subscription
A cut list optimizer with printable diagrams, wood movement for 100 species, board feet, stair stringers, shellac cuts, pilot holes. Free and unlimited — your project never leaves your device.
The tools
- No. 01
Cut List Optimizer
Parts list in, cutting layout out — sheet goods or boards, with kerf, grain locks, waste %, and a printable diagram.
- No. 02
Wood Movement Calculator
Species + board width + humidity swing → how much that panel will expand or shrink, flatsawn vs quartersawn.
- No. 03
Board Foot Calculator
Thickness × width × length → board feet and cost, with the 4/4–8/4 quarters convention explained inline.
- No. 04
Stair Stringer Calculator
Total rise → riser count and height, tread run, stringer length, and layout dimensions within IRC limits.
- No. 05
Finish Mixing Calculator
Shellac pound cuts, dilution ratios, and coverage — flakes to alcohol by the gram or the ounce.
- No. 06
Pilot Hole & Screw Chart
Screw gauge + hardwood or softwood → pilot, clearance, and countersink bit sizes from one chart.
Know your wood before you cut it
The species library covers 100 woods with the numbers that decide a design: Janka hardness, density, and — the one that ruins projects — seasonal movement, tangential and radial, with a calculator preset on every page. All of it from the USDA Wood Handbook, the public-domain reference the industry runs on.
Every calculator here runs entirely in your browser — there’s no server doing your math, no account holding your projects hostage, and nothing to upload. Hosting that costs almost nothing, so the tools cost nothing. If they earn a bookmark or a link to a fellow woodworker, that’s the business model.
New tools, when they’re ready
An occasional email when a new calculator ships. No spam, easy out.