Project Maths Calculators
Calculate angles, diagonals, tapers, radii, arcs, and compound angles for precise woodworking layouts.
Angle Calculator
Calculate angles for mitres, bevels, and polygon joints in woodworking.
Diagonal Calculator
Work out diagonal measurements for squaring up frames and cabinets.
Taper Calculator
Calculate taper angles and jig settings for tapered legs and wedges.
Radius Calculator
Find radius from chord and height measurements for curved work.
Arc Calculator
Calculate arc lengths, rise, and radius for curved woodworking pieces.
Compound Angle Calculator
Work out compound mitre and bevel angles for angled joinery.
Wood Expansion Calculator
Calculate seasonal wood movement for proper gap allowances.
Board Layout Calculator
Optimise part placement on sheet goods to minimise waste.
Cut List Optimiser
Optimise cutting patterns to maximise yield from standard boards.
Material Waste Calculator
Calculate waste percentages and material efficiency for projects.
10 free calculators in Project Maths
Workshop Mathematics for Woodworking
Accurate maths is essential for precision woodworking. From calculating compound angles for picture frames to working out expansion gaps for solid wood panels, getting the numbers right means getting the fit right first time.
Compound angles are needed whenever you cut a mitre and a bevel simultaneously — such as for crown moulding, splayed-leg furniture, or hopper boxes. Our compound angle calculator works out both the mitre and bevel settings for your saw, saving trial-and-error on expensive timber.
Checking a frame or cabinet is square requires measuring the diagonals. If both diagonals are equal, the assembly is square. Our diagonal calculator gives you the expected diagonal measurement so you know exactly what to aim for during assembly.
Wood movement across the grain can be significant — a 300mm wide oak panel might move 3–5mm between summer and winter. Our wood expansion calculator estimates seasonal movement based on species and width, so you can design proper allowances into your joints and framing.