Free workshop tools · no sign-up
Do the math before you make the first cut.
Woodwork Planner is a free set of woodworking calculators that tells you how much lumber to buy, how to cut it with the least waste, which miter angle and screw length to use, and how much finish you need. Every tool works in inches or millimeters, on any phone, with no sign-up.
61 free calculators for board feet, cut lists, miter angles, screw lengths and finish coverage — in inches or millimeters, right on your phone.
Which woodworking calculators can I use for free?
All of them — every calculator on this site is free and needs no account. Start with the most-used tools below, or browse all calculators by category.
Board Foot & Lumber Cost
Calculate lumber volume and total material cost.
02Cut List & Waste Optimizer
How many standard boards do you need?
03Miter & Bevel Angles
Saw settings for frames and multi-sided boxes.
04Pocket Hole Screw Selector
The right screw length and drill stop.
05Shelf Sag Calculator
Will your shelf bow under books? Check before you build.
06Wood Movement Calculator
Seasonal expansion of tabletops and panels by species.
07Finish & Stain Coverage
How much stain, poly or oil to buy for your project.
08Inch Fraction ↔ MM Converter
Tape-measure fractions to millimeters and back.
Need ready-to-build plans?
5 complete build plans with cut lists — $14.
What should I read before my next build?
Read up on lumber choice, cutting waste, safety and budgeting first — those four decide most of a project's cost and outcome. New guides, such as plywood grades explained and pocket holes vs. dowels vs. biscuits, appear every week.
6 min read
Choosing Lumber: Hardwood vs Softwood
Which wood for which project? Pine, oak, beech, plywood and MDF compared.
5 min read
Minimize Cutting Waste in 7 Steps
Save 15–30% on lumber costs with a smart cut list and the right order of cuts.
7 min read
Workshop Safety: The Complete Checklist
Protect your eyes, ears, lungs and fingers. Essential rules for every home shop.
6 min read
Budgeting a Furniture Project
How to calculate the true cost: lumber, hardware, finish, wear and tear, and your hours.