Convert between metric and imperial units. Length, weight, volume, and temperature — with woodworking-friendly fractional inches.
Type into either side — the other updates automatically.
Tip: when converting to inches, the nearest 1/64″ fraction is shown below the field.
Common woodworking conversions:
Plans from Europe in millimeters, lumber from the yard in fractional inches: this converter goes both ways and keeps shop-useful precision, including the nearest 1/64″ fraction when converting metric lengths back to imperial.
Save your numbers, not just crunch them
Members save cut lists and estimates to projects, feed them into the cost estimator, and track real spend against the plan.
18 mm is 0.709″ — just under 23/32″, which is why 18 mm Baltic birch and nominal ¾″ plywood are not quite interchangeable in dadoes.
For joinery, work to the nearest 0.1 mm or 1/64″. For rough sizing, 1 mm or 1/32″ is plenty.