Math for the workshop.
Calculators and reference tables for woodworkers, built to be fast, accurate, and bookmarkable. No login. No ads in your face. Just the numbers.
Calculators
Coming Soon
Lumber
Wood Movement
Estimate seasonal expansion and contraction by species and humidity change.
Shop
Shelf Sag
How much will that shelf bend? Calculate deflection by span, load, and material.
Lumber
Lumber Cost
Total project lumber costs across multiple boards, species, and prices.
Finishing
Finish Coverage
How much stain, poly, or oil for your square footage and number of coats.
Joinery
Pilot Hole
Correct pilot hole diameter for any screw size and wood species.