Francesco Zinghinì
Author and curator of GarageDoorCalcs.
Author and curator · GarageDoorCalcs
Francesco Zinghinì is the author and curator of GarageDoorCalcs. This is a truthful role: I am not a licensed garage-door installer, an IDEA-accredited door systems technician or a manufacturer engineer, and I do not claim any such trade credential.
My relevant, verifiable competence is building deterministic online calculators (open-source Python projects) and electronic-engineering training — rigor on the arithmetic and sizing math. Every formula on this site shows its basis, every convention is cited under Sources, and every calculator is numerically self-checked against known values (see Methodology).
Everything here follows one rule: the tools must stay correct with no ongoing maintenance. That is why every cost tool works only on the quantities you measure and the prices you enter from your own quotes and bills — the site keeps no door, opener or labor price list, no regional cost database and no live rates that would silently go stale. The only baked-in numbers are stable identities (square feet = width × height, 365 days a year, the geometry of framing clearances) and clearly labeled industry sizing typicals (material weight per sq ft, opener HP bands, R-value bands, spring cycle-life ratings, standard US door sizes) you can adjust to your own project.
A garage door is a real spend and, with springs, cables and off-track doors, a real safety matter. So every cost tool is framed as a planning estimate, not a bid; the spring, cable and off-track tools carry a prominent spring-safety warning to hire a trained technician; the opener tools note that a hard-wired circuit is a licensed-electrician job; the sizing tools note their values are labeled typicals; and the insulation payback tool is illustrative only. The aim is a neutral, free, no-signup reference you can use to sanity-check a company’s numbers — nothing that pretends to replace a professional.
Elsewhere
Reach me through the contact page.