ElbowCalc vs Duct Calc

Elbow Flat Pattern Maker is a professional tool designed for engineers, fabricators, and metal workers who need quick and precise elbow calculations. This app helps you calculate and visualize flat patterns for elbows and reducers in seconds. Enter your values, and get instant pattern graphs with cut coordinates to simplify fabrication and reduce material waste. Key Features: - Calculate various elbow types quickly and accurately. - Generate flat pattern graphs and cut coordinates. - Supports Elbow, Reducer Bend, and Cut Measurement. - Fast and precise calculations for professionals. - Share and save results instantly. - Clean and user-friendly interface. Perfect for sheet metal workers, pipe fitters, and fabrication experts — get precise elbow layouts anytime, anywhere with Elbow Flat Pattern Maker. in-app purchase included Lifetime to Remove Ads Privacy Policy : https://semiconhub.in/manager/privacy.html Terms and Condition : https://semiconhub.in/manager/tcondition.html

Size ductwork in seconds — round, rectangular, and yes, flex. Duct Calc is an offline HVAC duct calculator built for techs and designers who need answers on the job, not another subscription. FREE, FULLY WORKING • Duct sizing (equal friction, round) — enter CFM and friction rate (in. w.c./100 ft), get the exact diameter, the stock size to grab, and the velocity in FPM • Unit converter — airflow, velocity, and duct area. CFM · L/s · m³/h at one tap PRO (ONE-TIME PURCHASE) • Flex duct sizing — friction based on published research data (fully stretched to 30% compressed). Compressed flex loses far more pressure than the charts admit; Duct Calc corrects for it • Rectangular conversion — equivalent diameter to W×H (1-inch increments), with aspect-ratio warning • Airflow back-calc — know the duct, get the CFM: from round diameter or rectangular W×H, by velocity or friction rate • Register / diffuser selection — neck size, free area, and throw estimate from CFM and neck velocity • Static pressure — straight-run loss plus fittings (elbows, tees, transitions), totaled in in. w.c. BUILT FOR THE FIELD • 100% offline — works in the attic, the crawlspace, the mechanical room • Big touch targets, screen stays awake, no account, no sign-in • Your inputs never leave the device ONE-TIME PURCHASE The free version is fully functional — round sizing and conversion are never crippled. One purchase unlocks everything else, forever. No subscription. No ads. No features taken away later. Calculations follow standard practice (Darcy–Weisbach / Colebrook friction, ASHRAE equivalent-diameter equation, published flex-duct compression data). Reference only — verify final designs against applicable codes and manufacturer data.