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Reading the spec sheet
Nine calculators a working machinist actually uses — on a phone, in a shop, with no signal. Speeds & feeds, tap drill, threading, metal weight, and more. Free to download. No ads. No accounts. No subscription.
Captured from production build · v1.6.3
Speeds & Feeds — RPM, feed, MRR, chip-thinning
No vanity features. No quarterly redesign. The product solves something specific and gets out of your way.
RPM, IPM, MRR, and chip-thinning compensation in one screen. Material × Tool × Operation presets that match real shop conditions. Surface Speed and Chip Load ±50% sliders for fine-tuning on the fly — drag for feel, type the percent for precision.
Pick the thread, get the drill. Adjustable percent of thread engagement (50%–100%) with a live drill-size readout in decimal, fractional, letter, and number drill equivalents.
Pitch, lead, major / minor diameter, thread depth. 60° and Whitworth profiles. Tap drill size auto-cross-references the threading panel — set it once, use it everywhere.
Decimal, fractional, wire, and letter drills in one searchable, sortable chart. The print-out under your machinist box, in your pocket.
Round, square, rectangle, hex, tube, sheet, plate. Density tables for every common shop alloy. Bar weight by length or length by weight — quoting blanks just got easier.
Theoretical Ra from feed and tool nose radius. Or work backwards: target Ra → required feed. The math you used to do on the back of a traveler.
Length, area, volume, mass, force, pressure, temperature, torque. Imperial ↔ Metric, with shop-relevant precision — not 12 useless decimal places.
Common material data and tooling notes you actually use, baked into the app. No bookmarks. No PDFs. No signal needed.
Zero network requests. No login. No telemetry. No cloud lookup. Walks into a shop with no signal and works the same.
Toggle at the top of every screen. Inputs convert in place. Stop doing unit conversions in your head while a part is running.
Free to install on Google Play. Data Safety: nothing collected. No accounts. No subscription. We're not selling your attention to anyone — the core calculators are yours for life, no strings.
One $19.99 in-app purchase, yours for life, adds the G-code canned-cycle generator, threadmill code generator, advanced Surface Speed and Chip Load tuning sliders, and chip-thinning auto-compensation. No subscription. Ever.
Everything you’d want to know about ShopCalc on a single sheet. No marketing math.
Want a walkthrough of ShopCalc? We do live demos, off-the-record. No salesperson on the call — the people who built it.
