Join 50 free woodworking plans — no strings, just sawdust.

Fraction & Metric Calculator

Add and subtract tape-measure fractions, round to 1/16", and convert inches ↔ millimetres.

Tape-measure math

Use spaces for mixed numbers (3 5/8). Operators: + − × ÷ (or * and x). Add mm after a number to mix metric in.
—

Inches ↔ millimetres

Divide a board into equal parts

Sixteenths reference