Small home project planning

Buy the right amount before you start the job.

Fast calculators for paint, concrete, flooring, tile, drywall, landscaping, fences, decks, and contractor quote checks.

No accountShows the formulaBuilt for store runs
A table with measuring tools, tile samples, a notepad, and a phone calculator for planning a home project.
Project calculator

Paint Calculator

Estimate gallons of paint and primer for a room, including doors, windows, coats, and a practical waste buffer.

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Open full page
Estimate$126

3 gallons

734.8 sq ft of paint coverage after waste

Shopping list

  • 3 gallons of finish paint
  • 1 primer gallon if covering bare drywall or stains
  • Roller covers, tray liners, brush, tape, and drop cloths

Show the math

  1. Wall area = 2 x (12 + 12) x 8 - openings = 334 sq ft
  2. Coverage needed = 334 x 2 coats x 1.1 waste = 734.8 sq ft
  3. Gallons = 734.8 / 350, rounded up = 3
Measure unusual rooms wall by wall.Dark colors and textured walls may need lower coverage.

Calculator library

Start with the number you need at the store.

Paint CalculatorBest for a quick store run before painting one room or several similar rooms.Mulch, Soil, and Gravel CalculatorBest for landscaping beds, gravel paths, raised areas, and topsoil orders.Flooring Box CalculatorBest before buying boxed flooring at a home center or local flooring shop.Tile CalculatorBest for planning a bathroom floor, laundry room, backsplash, or entryway tile job.Drywall Sheet CalculatorBest for finishing a room, garage wall, closet, or patch-heavy remodel.Concrete Bag vs Ready-Mix CalculatorBest for slabs, pads, footings, and post holes where depth matters.Fence Material CalculatorBest for early planning before requesting quotes or shopping for a simple fence line.Deck Material CalculatorBest for a first budget before deciding whether to DIY or call a deck contractor.Contractor Quote Comparison CalculatorBest when bids look close but allowances, deposits, and change-order risk are different.Roof Shingle CalculatorBest for rough planning and quote checking, not for walking or measuring a roof.

Useful guides

Short notes for the choices calculators cannot make.

Paint planningHow Much Paint Does a Room Need?

A practical paint estimate starts with wall area, subtracts openings, multiplies by coats, then adds a small buffer.

Concrete planningConcrete Bags vs Ready-Mix

Small pads can make sense with bags. Larger pours usually become a time, labor, and delivery decision.

Quote sanity checkDIY vs Contractor Cost Check

Use a quick cost check before you decide whether a project is worth doing yourself or quoting out.