About FloorsCalcs
FloorsCalcs is an independent project with one goal: to gather the everyday calculations homeowners and DIYers reach for when a floor is going in — flooring cost & installation, material quantity, subfloor & prep, layout & trim, tile & grout, and refinishing & specialty — in one focused, free, no-signup hub with transparent formulas, so you can budget a flooring project and sanity-check a contractor’s quote.
Who is behind it
Author and curator
To be clear about credentials: I am the author and curator of this site — not a licensed flooring installer, an NWFA- or CTEF-certified installer or a manufacturer rep, and I claim no trade credential. What I bring is relevant and real: building deterministic online calculators (open-source Python projects) and electronic-engineering training, i.e. rigor on the quantity and cost 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 flooring math (material = area × (1 + waste); boxes = ceil(material ÷ box coverage); tiles = ceil(area × (1 + waste) ÷ tile size); carpet sq yd = area ÷ 9 × (1 + waste); rolls, leveler bags, subfloor sheets and trim pieces by coverage; install cost = area × your $/sq ft + labor + Σ add-ons − discount, ×(1 + contingency)) and stable conventions (9 sq ft = 1 sq yd; a 4×8 sheet = 32 sq ft; waste % by pattern; box/tile coverage; grout & thinset coverage; expansion gap & acclimation). There are deliberately no material or labor prices, no regional cost indexes, no product catalog and no installer directory — 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 and material-quantity guides: get itemized written quotes from licensed, insured flooring installers, confirm coverage on your product’s box/spec sheet, and buy 5–10% extra for cuts, waste and future repairs. Questions? Use the contact page.