Francesco Zinghinì
Author and curator of PipeCalcs.
Author and curator · PipeCalcs
Francesco Zinghinì is the author and curator of PipeCalcs. This is a truthful role: I am not a licensed master plumber, gas fitter, mechanical engineer or financial advisor, and I do not claim any trade, engineering or finance credential.
My relevant, verifiable competence is building deterministic online calculators (open-source Python projects) and engineering training — rigor on the arithmetic and physics. 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 calculator works only on the quantities you measure and the prices and rates you enter from your own quotes and bills — the site keeps no price list, no regional cost database and no live rates that would silently go stale. The only baked-in numbers are stable conventions (the 7.48-gallon, 2.31-ft-per-psi and 0.0408 pipe-volume identities, BTU↔CFH factors, WSFU/DFU and pipe-size planning bands) that are labeled as planning figures and cited so you can adjust them to your own project.
Plumbing is a big spend and, with gas, a real safety matter. So every cost tool is framed as a planning estimate, not a bid; pipe, drain, vent and gas sizing tools carry a plain reminder that your local plumbing code and inspector govern and to confirm with a licensed plumber and pull permits; every gas tool carries a prominent reminder that gas work must be done by a licensed professional. The aim is a neutral, free, no-signup reference you can use to sanity-check a plumber’s numbers — nothing that pretends to replace a professional.
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Reach me through the contact page.