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Eleven calculators a working machinist actually uses - on a phone, in a shop, with no signal. Speeds & feeds, tap drill, threading, metal weight, drill chart, plus optional Pro G-code generator and Tool Library. Free on the App Store and Google Play.
Captured from production build · v1.7.10
Speeds & Feeds - RPM, feed, MRR, chip-thinning
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.
Fanuc-style canned cycles (G81 drill, G82 spot, G83 peck, G84 rigid tap, G85 bore) and helical thread-milling (internal + external, RH/LH, climb/conventional, multi-pass). Output pastes straight into Haas, Mazak, Centroid, LinuxCNC, Mach3/4 - always dry-run before metal. Multi-op programs, machine profiles, and saved jobs live in ShopCAM, the separate advanced workflow app (in development).
Common Starts presets (1/4″ + 1/2″ alum, mild steel, 4140, 304SS, chamfer, drill) tap to auto-fill Speeds & Feeds. Then save your own real tools by name - recall the exact diameter, flutes, chip load, and SFM with one tap. Stored on device, no account.
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 the App Store and Google Play, with every core calculator - speeds & feeds, tap drill, threading, drill chart, metal weight, surface finish, conversions, reference. Want G-code generation, Tool Library save/recall, and the fine-tune sliders? Pick the fit: $4.99/mo to try, $35.99/yr for the best value (saves ~40% over monthly), or $79.99 once - pay once, every future Pro feature included automatically. Original Pro buyers from earlier versions automatically own Lifetime. Family Sharing on iOS Lifetime, restore on any device on Android. No ads. No tracking.
Everything you’d want to know about ShopCalc on a single sheet. No marketing math.
Same DNA - offline, no ads, no accounts, no tracking. Pro Unlock optional, three tiers.
Want a walkthrough of ShopCalc? We do live demos, off-the-record. No salesperson on the call - the people who built it.
