About LandscapingCalcs
LandscapingCalcs is an independent project with one goal: to gather the everyday calculations homeowners, DIYers and buyers reach for across a yard project — lawn & seed, landscape materials, hardscaping, fencing & decking, irrigation & watering, and tree & plant care — in one focused, free, no-signup hub with transparent formulas.
Who is behind it
Author and curator
To be clear about credentials: I am the author and curator of this site — not a licensed landscape architect, certified arborist, agronomist, civil engineer or financial advisor. What I bring is relevant and real: building deterministic online calculators (open-source Python projects) and engineering training, i.e. rigor on the geometry and arithmetic. That is what it takes to curate a hub of calculators: transparent method, correct formulas, cited conventions and worked examples.
Our principle: transparent & durably correct
Every calculator shows its formula, a worked example and a reference table. The tools rest only on timeless landscaping math (cu yd = area × depth ÷ 324; tons = cu yd × density; grass seed lb = area × rate ÷ 1,000; pavers = area ×(1+waste) ÷ paver size; watering gal = area × inches × 0.623; cost = quantity × your unit price) and stable conventions (324 area-depth factor; 27 cu ft per cu yd; 0.623 gal per sq ft per inch; ~13.5 bags per cu yd; ~450 sq ft per pallet; labeled seeding, density, paver and spacing typicals). There are deliberately no material or service prices, labor rates or regional cost indexes — cost tools use the prices you enter — so the results stay valid over time.
Correctness is checked against known reference values (see the methodology and the numeric self-check). The formulas and their basis are documented under Sources & formulas. All results are planning estimates: coverage varies by product, so buy about 5–10% extra and confirm on the bag; get itemized written quotes from licensed, insured landscapers and contractors; tree removal and land clearing are dangerous — hire a licensed, insured arborist; retaining walls over about 3–4 ft usually need an engineer and a permit. Questions? Use the contact page.