Duct Calculator

A digital duct sizing wheel that quickly sizes new ducts for HVAC engineers and contractors.

Mobile appone_time

A modern digital version of the duct sizing wheel for iPhone and iPad, designed to size and calculate HVAC ductwork quickly on mobile devices. It replaces clumsy, hard-to-read physical wheels with clear, phone- and tablet-friendly calculations for engineers, designers and contractors. The app is established on the App Store and aimed at professionals who need accurate duct sizing in the field.

Website iOS

Full match profile

Behind the summary, Matchbox keeps a richer profile of Duct Calculator - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

Claim Duct Calculator to unlock →

Try Matchbox with your own problem

Describe what is not working - we’ll show you whether Duct Calculator (or something else) actually fits.

Try a problem