Workshop tools

Quick reference tools for fabrication and machine shop work - no account, no long forms, calculated instantly in your browser.

What wrench do I need?

Quick lookup for bolts and sockets.

Tap drill size

Find the drill for a given thread.

mm ↔ inches

Quick length converter.

Plate weight

Estimate the weight of a plate.

Drilling RPM

Calculate spindle speed.

Torque

Convert torque units.

Geometry calculators

Circle, right triangle, bolt circle.

Thread table

Metric, UNC and UNF reference.

Reference values only - always verify against the actual part before machining, tapping or tightening anything.