Sheet Metal Calc - HVAC Duct

Order the right sheets before the truck leaves the supply house. Sheet Metal Calc estimates sheet count, square feet, and total cost for straight duct, elbows, and transitions in under 30 seconds — no signup, no ads, no scrolling through 15 calculators you'll never use. WHAT IT DOES • Three fabrications: straight duct, 90° elbow, and rectangular transition • Sheet count at standard 4ft × 10ft galvanized stock with 10% scrap built in • Square feet of total sheet metal area • Gauge selector: 24ga / 26ga / 28ga — pick once, set defaults in Settings • Cost estimate at your entered $/sheet per gauge — call the supply house or quote the customer • Imperial or metric input, swap anytime WHO IT'S FOR Working HVAC sheet metal mechanics — fabricators, foremen, and small crews — who need a fast number on-site or in the shop to call the supply house or quote the customer. If you're sizing a residential supply duct, light-commercial branch, or a fitting takeoff from a print, this is built for you. WHY THIS APP Most HVAC sheet metal calculators are either SMACNA-table apps with no cost output, or so basic they only give you a square footage with no way to turn it into a sheet order. Sheet Metal Calc covers the full takeoff workflow: dimensions in, supply-house order out. No clutter. No subscriptions. ON THE JOB Punch width, height, length. Pick the gauge your supplier stocks. Sheet count rounds up to whole sheets — that's how you order. Square footage already includes the 10% scrap factor. Cost is ready to text the customer or call into the supply house. Switch imperial or metric mid-job and the form resets cleanly so a '24' never gets confused between feet and meters. COMMON QUESTIONS Q: Sheet size? Standard 4 ft × 10 ft galvanized stock (40 sqft per sheet) — the HVAC supply-house default. Q: Gauge weights? ASTM A653 — 24ga 1.156, 26ga 0.906, 28ga 0.781 lb/sqft. Cost only, not sheet count. Q: Spiral round duct? Not in v1; on the roadmap. PRICING Free to download. Calculate sheet count and area free, forever. One-time in-app purchase unlocks cost estimation at your local supplier rate. No subscriptions, no recurring charges. PRIVACY No accounts. No tracking. No data leaves your phone. Recent calculations are stored locally — wipe them anytime from settings. DISCLAIMER Estimates only — verify with your supplier and project specs. Support: [email protected]