Paint calculator
Estimate rectangular-room wall area, paint litres, waste, whole containers, and optional container cost.
Metric-first estimates
Home Project Calculator Hub
A small, browser-only starting point for home material estimates. Available calculators cover paint, flooring, tile, concrete, gravel, soil, and mulch with transparent formulas and optional cost estimates.
Metric-first, browser-only
V1 calculator inputs are handled in the browser. The source has no accounts, analytics, database, ads, affiliate links, supplier pricing feed, or third-party API lookup.
- Metric units are the primary input format.
- Formula assumptions are visible on each calculator page.
- Optional cost fields multiply by prices you enter; they do not fetch prices.
- Results are planning estimates, not engineering, structural, legal, installation, or supplier advice.
Five Tool Cards
Each card links directly to a crawlable static calculator route.
Flooring calculator
Estimate flooring area across one or more rectangular zones, then round waste-adjusted area up to whole boxes.
Tile calculator
Estimate floor or wall tile area, individual tiles, whole boxes, and optional box cost.
Concrete calculator
Estimate concrete volume for slabs, footings, or cylindrical post holes, with optional bag rounding.
Gravel, soil & mulch calculator
Estimate bulk material volume, tonnes from editable density, and optional litre-bag counts.
How It Works
Measure in metres or millimetres as requested, enter the visible assumptions, calculate in the browser, then review formula details and limitations.
Guides
- How to Measure a Room for Paint
- How to Calculate Flooring Waste
- How to Measure for Floor and Wall Tiles