Free Woodworking Calculators & Tools
Fast, accurate tools for planning a build — optimize cut lists, estimate lumber, and check whether a shelf will sag. No signup, no ads in the way; everything runs right in your browser.
Cut List Optimizer
Turn your parts list into the fewest boards or plywood sheets with the lowest-waste cutting layout — for both linear boards and 2D sheet goods, with saw kerf, materials and cost built in.
Board Foot Calculator
Total board feet and lumber cost from thickness, width, length and quantity. Accepts inches, feet or metric.
Open toolShelf Sag Calculator
Will your shelf sag? See how far it deflects from span, thickness, material and load — before you build.
Open toolLumber Cost Calculator
Price your whole lumber list by board foot, linear foot or per piece — and get the project total.
Open toolPocket-Hole Screw Guide
The right jig setting, screw length and thread for any material thickness — plus the full chart.
Open toolWood Hardness Chart
Compare 21 species by Janka hardness, weight, cost and workability — sortable and searchable.
Open toolDecking Calculator
Estimate deck boards, joists and screws from your deck size and board width — with a cost total.
Open toolStain Coverage Calculator
How much stain, poly, paint or oil you need from the area and number of coats — plus what to buy.
Open toolWood Weight Calculator
The weight of any board by species and size — handy for shipping, mounting and sizing supports.
Open toolMiter Angle Calculator
Exact miter and bevel angles for frames, boxes and any-sided projects — including compound cuts.
Open toolWood Movement Calculator
Estimate seasonal expansion and contraction so your joinery survives the seasons.
Workbench Height Calculator
Find the right bench, assembly-table and saw-station height for how you work.
Built for the shop, free for everyone
These are the same calculators we reach for when planning a project — accurate, quick, and free of logins or paywalls. They run entirely in your browser, so your measurements never leave your device. New tools are added regularly; if there's one you want, it's probably next on the list. Pair them with our woodworking plans to go from idea to cut list to build.