Free woodworking calculators
The math you actually use, made fast and mobile-friendly. No login, no ads. To save projects, sync between phone and shop, or export branded quotes, create an account.
- ★ FEATURED · TAPE-MEASURE FRACTIONS (MOBILE)CalculatorType 3 5/8 + 1 7/16 the way you'd say it. Multi-format ribbon, named variables, offline reference. Available in the Joixt mobile app.
- WOOD MOVEMENTShrinkulatorHow much will a board move between two moisture contents? Tangential and radial shrinkage per species, USDA FPL math.
- SHELF DEFLECTIONSagulatorMaximum midspan sag under a uniform load, with self-weight. Pick a species, set the span and load, see if it's safe.
- SLOPED POLYGONSCompound miterSaw miter and blade tilt for a sloped vessel with N sides. Sloped boxes, crown molding, hopper joints.
- FLAT POLYGONSPolygon miterFlat miters and interior angles for any regular polygon — squares, hexagons, octagons, more.
- HOW MUCH TO BUYFinish coverageStain / poly / lacquer for a given area and number of coats. Brand-agnostic with a configurable buffer.
- DUCT + SP LOSSDust collectionCFM per tool, duct diameter, and static-pressure loss for a small woodworking shop.
- CIRCUIT LOADShop electricalBreaker size and wire gauge for a 120V or 240V shop circuit. NEC continuous-duty factor included.
REFERENCE
Browsing for a species spec instead? Wood species database →