Francesco Zinghinì
Author and curator of LandscapingCalcs.
Author and curator · LandscapingCalcs
Francesco Zinghinì is the author and curator of LandscapingCalcs. This is a truthful role: I am not a licensed landscape architect, certified arborist, agronomist, civil engineer or financial advisor, and I do not claim any trade, horticultural, engineering or finance credential.
My relevant, verifiable competence is building deterministic online calculators (open-source Python projects) and engineering training — rigor on the geometry and arithmetic. 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 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 324 area-depth factor, 27 cu ft per cu yd, 0.623 gal per sq ft per inch, ~13.5 bags per cu yd) and clearly labeled coverage, density, seeding and spacing typicals that you can adjust to your own project.
Landscaping is a real spend and, with tree work and tall walls, a real safety matter. So every material tool is framed as a planning estimate — coverage varies by product, buy a little extra; every cost tool is a planning estimate, not a bid; the tree-removal and land-clearing tools carry a plain reminder to hire a licensed, insured arborist; and the retaining-wall tools note that tall walls need an engineer and a permit. The aim is a neutral, free, no-signup reference you can use to sanity-check a landscaper’s numbers — nothing that pretends to replace a professional.
Elsewhere
Reach me through the contact page.