Cone Flat Pattern Calculator

Professional sheet metal layout calculator for expanding cones.

Whether you are a sheet metal worker, tinsmith, welder, or fabricator, Cone Flat Pattern Calculator provides highly accurate calculations for developing flat patterns in seconds. Eliminate manual drafting and complex trigonometry on the shop floor!

Calculate straight, truncated, and oblique (eccentric) cones for ventilation, piping, hoppers, and industrial ductwork with flawless engineering precision.

- -- 📐 EXPANSION MODES SUPPORTED ---
• Straight Cone: Full cone development using Radius and Height.
• Truncated Cone: Flat patterns for concentric cone transitions (frustum).
• Oblique Cone: Eccentric cone layouts with offset apex parameters.
• Oblique Truncated: Complex eccentric transitions between flat circular faces.
- -- 🛠️ NEW! ADVANCED SHOP-FLOOR TOOLS ---
• Smart Seam Allowances: Add fabrication tolerances instantly. Supports standard industrial joints including Overlap, Weld, Lock seam, and Pittsburgh allowance (16 mm fixed).
• DXF export — open in AutoCAD, FreeCAD, LibreCAD, any CNC software
• Interactive Formula Book: Access complete geometric relations and formulas for all cone types directly in the app. Ideal for verifying layouts or double-checking calculations manually.
• Fast-Access Templates: Save your frequently used dimensions as templates with custom names (up to 50 slots). Load them instantly to speed up repetitive fabrication workflows.
• Smart Calculation History: Never lose your work. Review your recent calculation parameters, precise sheet weights, and lateral areas at a glance.
- -- ⚙️ KEY FEATURES FOR FABRICATORS ---
• Comprehensive Geometry: Instantly get slant heights (Lmin, Lmax), angles, and precise volumes.
• Weight calculation
• Material & Weight Estimation: Calculate the lateral area and estimated weight based on sheet thickness and material type (Steel, Copper, Aluminum, or Custom density).
• Triangulation Division Table (n=12): Step-by-step layout markers for manual marking. Includes precise chord developments and PatX coordinates for perfect geometric accuracy.
• Clean, High-Contrast UI: Dark industrial theme designed for optimal readability under poor workshop lighting or direct sunlight.
• Flexible Units: Work seamlessly in millimeters (mm), centimeters (cm), or inches (in).

Save time, minimize material waste, and speed up your workflow. Download Cone Flat Pattern Calculator today and optimize your fabrication layout process!