Metalwork Calculators

This section of the site includes a selection of on-line calculators for working out various different things. If you have an idea for a calculator that would be useful, then please get in touch and I'll see what I can do.

Calculators currently available:

Units

• Unit Converter: a quick & simple unit converter.

Printable Scales

• Divider Wheel Generator: a simple tool for generating a printable wheel with a configurable number of division lines.
• Numbered Wheel Generator: a simple tool for generating a printable wheel with a numbers around the dial.
• Linear Scale Generator: a simple tool for generating a printable scale with a configurable number of division lines.

Gear Calculators

• Gear Calculator / Generator: a tool for calculating involute gear parameters and generating DXFs of gears.
• Mini-Lathe Change Gear Calculator: a tool for calculating change-gears for threading on the 7x12 mini-lathe.
• Harrison M250 Change Gear Calculator: a tool for calculating change-gears for threading on the Harrison M250.
• Harrison M300 Change Gear Calculator: a tool for calculating change-gears for threading on the Harrison M300.
• Boley & Leinen LZ4P Change Gear Calculator: a tool for calculating change-gears for threading on the Boley & Leinen LZ4P.

Thread Related Calculators

• Thread Dial Indicator Calculator: a tool for helping with the use of a thread dial indicator.
• Three-Wire Screw Measurement: a tool for calculating dimensions for three-wire measurement of screw threads.
• Tap Drill Sizes: a tool for calculating drill sizes for tapping at different thread engagements.

Other

• Knurling Calculator: a tool for calculating stock diameters for knurling.
• Spring Calculator: a tool for calculating information about springs & how to wind them.
• Cutting Speed Calculator: a tool for calculating cutting speeds for various materials.
• Dividing Head Calculator: a tool for working out how to use a dividing head for a given number of divisions.

I am a hobbyist metalworker and woodworker. I work as an electronic design engineer and spend most of my working days in front of a computer so I enjoy having the opportunity to use my hands and make things in my spare time. I particularly enjoy making tools as I can then use them on other projects. This website showcases some of the things I've made.

This website is free and ad-free, but costs me money to run. If you'd like to support this site, please consider making a small donation or sending me a message to let me know what you liked or found useful.

Please do get in touch if you notice any issues on the site or can think of anything that would be a helpful addition or improvement.