Frequently Asked Questions

They use standard contractor-style formulas (area, volume, waste factors) and round up so you are less likely to run short. Always confirm critical numbers against product labels, especially batch-matched paint, tile, and wallpaper.

Yes. Use the unit toggle on each calculator. Dimensions convert when you switch units so totals stay consistent—same behavior as switching from feet to meters on a tape measure.

Calculations run in your browser. HomeScope does not store your room dimensions on our servers for these tools. Contractor directory pages use public-style listings only.

City and category pages are set up for structured listings. Use the site contact flow your team defines for claiming or updating a business profile as you grow the directory.

Use these estimates as a planning starting point. Formal bids should include site verification, local codes, and supplier quotes. The app is informational, not a substitute for licensed pros where required.

Most tools currently estimate material quantities only. Cost overlays are planned in Phase 3, including DIY vs contractor budget ranges.

Yes. Most calculators now include a Draw mode where you can place points on a grid and estimate using your custom shape.

Defaults follow common trade practice. You can adjust waste based on project complexity (e.g., diagonal tile or complex cuts need more).

Yes. Calculator pages include Download PDF and Email Estimate actions for easy sharing with suppliers or contractors.

Some city/category pages are placeholders while we complete real listing coverage. We show a clear coming soon state instead of empty results.

Yes. Inputs convert when toggled so calculations remain consistent, with display values shown in your selected unit system.

Use HomeScope as a planning baseline, then verify pack/coverage specs and final quantities with your supplier before purchase.

Calculator math runs in-browser. We do not currently provide account-based saved projects for calculator inputs.

A common planning range is about 350 to 400 sq ft per gallon per coat on smooth, prepared walls. Rough or porous surfaces can need more paint.

Include primer for new drywall, major color changes, stains, or patched/porous surfaces. Primer often reduces topcoat usage and improves finish consistency.

Paint is purchased in whole containers, so rounded totals may stay the same for small changes. Use the exact pre-round number for finer planning.

Use around 10% for straight layouts, 15% for diagonal layouts, and up to 20% for complex patterns or many obstacles.

Yes. Keep at least a few extras (or one unopened box) for future repairs because dye lots and product lines can change over time.

A common estimate is roughly 28 to 32 screws per 4x8 sheet, depending on wall/ceiling placement and local code or manufacturer guidance.

Longer sheets can reduce seams on taller or longer walls, but they are heavier to handle. Use what best matches room dimensions and install logistics.

Multiply length x width x thickness (in feet) to get cubic feet, then divide by 27 for cubic yards. Add a buffer before ordering.

Small jobs can work with bags, but around 1 to 1.5 cubic yards and above, ready-mix is often faster and less labor-intensive.

One roofing square equals 100 sq ft of roof surface. Many asphalt shingles are estimated around three bundles per square, then adjusted for waste.

Plan around 10% for simpler roofs and 12% to 15% (or more) for roofs with hips, valleys, dormers, and complex cuts.

R-value targets vary by climate zone and assembly (attic, walls, crawlspace). Check local energy-code guidance and product labeling for your region.

Yes, larger openings are usually subtracted from gross wall area, then waste is added for cuts and starter/trim conditions.

End cuts, defects, pattern alignment, and board lengths create unavoidable loss. Adding a realistic waste factor helps avoid shortfalls mid-build.