Bend Calculator

Generate instant, mathematically perfect flat pattern layouts for complex geometric transitions. Bend Calculator is the ultimate iOS companion for sheet metal professionals, mechanical engineers, and fabricators. Engineered to eliminate tedious manual math, this app delivers instant, field-ready flat patterns for HVAC ductwork, custom welding, industrial piping, and architectural metal roofing. Whether you are at a desk or on the shop floor, get your dimensions in and your precise results out instantly. Core Calculations & Allowances • Cones & Frustums: Generate instant layouts for standard cones, plus parallel and angled eccentric frustums. • Truncated Cylinders: Map out precise cylindrical cuts effortlessly. • Bend Allowances: Compute exact bend deductions and allowances across any angle to ensure flawless folding every single time. Seamless Transitions • Rectangle & Circle: Calculate smooth, mathematically exact transitions for rectangle-to-circle (standard and eccentric). • Reverse Transitions: Effortlessly compute circle-to-rectangle and rectangle-to-rectangle ductwork intersections. Smart Tools for Modern Workflows • Save Your Calculations: Never lose track of a complex layout. Save your frequently used dimensions and access your history instantly for repeat jobs. • Light & Dark Mode: Engineered for comfort in any environment. Use a crisp, high-contrast light theme in the drafting room, or seamlessly switch to a sleek, eye-saving dark mode on the shop floor. The Professional's Choice • Frictionless Interface: A clean, modern iOS UI built for speed. No clunky menus—just rapid data entry and instant calculations. • Absolute Precision: Eliminate drafting errors, reduce costly material waste, and trust the math every time you make a cut. Stop drafting transitions by hand. Download Bend Calculator to bring speed, accuracy, and modern efficiency to your next fabrication project.