21 Industrial Calculators

Engineering Math, Simplified

Professional-grade calculators for machinists, fabricators, and engineers. Get accurate results for CNC operations, welding, hydraulics, and more.

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Popular Calculators

The most-used tools by machinists and engineers

Machining

CNC Speed & Feed

Calculate optimal spindle speed and feed rate for machining operations based on material and tooling.

Materials

Hardness Converter

Convert hardness values between Rockwell, Brinell, Vickers, and other scales.

Welding

Weld Consumables

Estimate the amount of welding wire, rod, or shielding gas required for a given joint.

Fasteners

Bolt Torque

Calculate recommended tightening torque based on bolt size, grade, and lubrication.

Machining

Drill & Tap Chart

Quick reference for drill sizes, tap sizes, and clearance holes for standard threads.

Materials

Material Weight

Calculate the weight of metal stock by dimensions and material density.

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FAQ

Everything you need to know

Yes, 100% free. No hidden fees, no premium tiers, no paywalls. Every calculator on ShopMath is completely free to use, forever.
No account required. Just open the calculator you need and start working. We don't collect your data or require any sign-ups.
Our calculators use industry-standard formulas and are tested against established engineering references. We show our methodology for every calculator so you can verify the math yourself.
Absolutely. ShopMath is designed to work on any device—phone, tablet, or desktop. The interface is optimized for quick, one-handed use when you're at the machine.
We'd love to hear from you. Use our contact page to report issues or suggest new calculators. We're constantly improving based on feedback from machinists and engineers.
Yes! We're actively developing new calculators based on user requests. We regularly add new tools for machining, fabrication, and engineering applications.

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