Stop doing shop math in your head. Woodworker's Toolbox is a complete set of workshop calculators built for real woodworkers — fraction math, board feet, drill bits, Janka hardness, and more. Large buttons, one-handed operation, no account required. CALCULATORS • Fraction Calculator — add, subtract, multiply and divide fractions without converting to decimals. • Board Feet Estimator — calculate board feet and lumber cost by the piece or by the project. • Pocket Hole Guide — select material type, enter thickness, get the right screw length and thread type every time. • Wood Movement — predict shrinkage and expansion based on species, cut, and moisture change. REFERENCE • Wood Species Database — 280+ species with Janka hardness ratings. Know how hard a wood is before you buy it. • Drill Bit Selector — enter your screw size, get the right bit rounded up to the nearest standard size. • Pilot Hole Chart — quick reference for pilot holes, clearance holes, and countersinks by screw size. • Drill Index — complete reference organized by fractional, numbered, lettered, and metric sizes. • Imperial ↔ Metric Converter — no mental gymnastics. DESIGNED FOR THE SHOP Dark mode. Works offline. No ads, no subscription, no account.