Arc & Arch Layout Calculator vs FabCalc

Arc & Arch Layout Calculator is the precision toolkit every carpenter, joiner, mason, stonemason, builder and DIY enthusiast needs to lay out perfect arches and curves on any job — without complex trigonometry and without ever pulling string from a nail. TWO PROFESSIONAL CALCULATORS IN ONE APP Large Arc Layout Set out a large-radius arc inside any confined space — an opening, a wall, a panel or a curved trim run. Enter the chord width plus either the rise (height) or radius and instantly see: • Sweep angle, arc length, slice and full-circle area • Inside arc mark-out — heights every increment from chord centre out • Outside arc mark-out with optional outer offset • An interactive set-out diagram you can pinch to zoom and drag to pan • A printable template with automatic A4, Letter, A3, A2 and A1 page-fit guidance • A bonus calculator that derives width, height, length and area from radius and sweep angle Gothic Arch Layout Design true masonry arches with mathematical precision. Choose equilateral, lancet or drop arches — the app classifies them automatically — and instantly receive every dimension you need: • Inner and outer radius, inner and outer height • Triangle chord and triangle drop for the gothic set-out • Intrados and extrados arc lengths • Setout mark-out heights from centre out • Voussoirs: full unit count per side, inner and outer arc per voussoir, plus a dedicated keystone diagram • Optional full-scale keystone and voussoir templates ready to print EVERY MEASUREMENT, METRIC OR IMPERIAL Every input switches instantly between Metric (mm) and Imperial (feet, inches and 1/16 to 15/16 fractions). Imperial inputs use clean three-wheel pickers — feet, inches, fraction — so a 6 ft 3 1/2 in chord takes seconds. INTERACTIVE DIAGRAMS YOU CAN ACTUALLY READ Every calculation is paired with a crisp, vector-quality diagram. Pinch to zoom, drag to pan, double-tap to fit, and use the live measure tool to read distances off the drawing. EXPORT TO PDF FOR THE WORKSHOP One tap exports a complete multi-page PDF: a tidy summary page with all your inputs and results, followed by every diagram on its own page — perfect for printing the template at full scale or sharing with the team. NATIVE iOS DESIGN • Built with SwiftUI for iPhone and iPad • Works completely offline • Saves your last inputs automatically • No accounts, no subscriptions, no ads • Respects Dynamic Type and Dark Mode Stop guessing. Calculate, lay out, print and build — accurately, every time.

The flat pattern calculator your fab shop needs — cylinders, cone gores, duct wraps, and more. Fully offline. No account. No ads. Stop laying out cone gores by hand on the table. Stop guessing developed length on a duct wrap. FabCalc generates shop-ready flat pattern drawings and 1:1 DXF files for common fabricated shapes. WHAT'S INSIDE • Cylinder wrap — full shell and partial segments • Half-pipe sleeve — 180° cylinder segments • Cone / frustum gore — annular sector with slant length and arc development • Rectangular duct wrap — four-panel strip with bend lines and bend allowance • Live 2D preview — cut profile, bend lines, roll direction, dimensions • DXF export — AutoCAD R12 ASCII, layered (CUT, BEND, ROLL, TEXT), 1:1 scale • PDF job sheet — drawing, inputs, calculated values, notes • Saved jobs — reopen and edit patterns locally WHO IT'S FOR Fabricators, sheet metal workers, pipe fitters, boilermakers, plasma/laser operators, and shop owners who need accurate flat patterns without desktop CAD. FREE vs PRO Free forever: all shape inputs, live preview, calculated values, warnings, and DXF cut-file export. Pro unlocks PDF job sheets and unlimited saved jobs. One-time purchase or subscription. Subscriptions auto-renew until cancelled. Manage in your Apple ID Subscription Settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://doublevision.company/privacy NO ACCOUNT. NO ADS. NO DATA COLLECTION. FabCalc works on the layout table, at the plasma table, in the truck. Everything runs locally.