Flooring and tile · 7 min read
Tile Waste Percentage Guide: Straight Grid vs Herringbone vs Diagonal
How much extra tile to order based on room layout, tile size, and pattern complexity to avoid running out mid-installation.
Read the guide →Home improvement
Know the real cost before you demo
Room-by-room remodeling cost calculators, material waste estimators, and DIY guides with itemized line items for kitchens, baths, decks, and more.
No sign-up. No data leaves your browser. Updated 2026.
Free calculators
Each tool includes a worked methodology, assumptions, and common pitfalls below the numbers.
Bathroom remodeling
Bathroom Remodel Cost Estimator: Full Bath & Powder Room
Calculate total renovation costs for small powder rooms (25 sq ft), standard full baths (40-60 sq ft), or master suites (100+ sq ft) across three finish tiers.
Open calculator → Kitchen remodelingKitchen Remodeling Cost Estimator by Square Foot
Calculate realistic kitchen renovation costs across minor cosmetic, midrange, and upscale luxury tiers, with an itemized breakdown of materials vs contractor labor.
Open calculator → Flooring and tileTile & Grout Waste Estimator by Layout Pattern
Accurately calculate tile square footage, pattern cut waste factors (10% standard, 15% diagonal, 20% herringbone), boxes needed, and pounds of grout.
Open calculator →Latest guides
Practical walkthroughs with the math shown, not just conclusions.
DIY planning · 8 min read
Remodeling ROI: Which Home Improvement Projects Actually Add Resale Value?
Analyzing the Cost vs Value Report: high-ROI exterior curb appeal projects vs luxury interior remodels and return on investment benchmarks.
Read the guide → DIY planning · 8 min read
Plumbing & Electrical Rough-In Costs: What to Expect Behind the Drywall
Cost per linear foot for PEX plumbing, drain-waste-vent piping, Romex electrical wiring, dedicated 20A circuits, and inspection rough-ins.
Read the guide → DIY planning · 7 min read
Remodeling Permits and Inspections: What Homeowners and DIYers Must Know
When do you need a building permit? What happens if you remodel without permits? How municipal rough-in and final inspections work.
Read the guide → DIY planning · 8 min read
How to Prevent Remodeling Budget Overruns: The Homeowner Playbook
Seven practical strategies to keep your home renovation on schedule and on budget: detailed finish schedules, allowance caps, and change order rules.
Read the guide → DIY planning · 8 min read
Contractor Labor vs Materials: How Renovation Quotes Break Down
How to evaluate contractor estimates: the standard 40/60 rule, markup percentages, line-item transparency, and spotting lowball bids.
Read the guide →Remodeling Cost Guides
Itemized cost breakdowns by project, room size, and finish tier, with labor, material, and contingency line items.
- Kitchen Remodel Cost Breakdown: Line-by-Line Pricing Guide (2026) Detailed cost breakdowns for minor ($15k–$25k), midrange ($30k–$55k), and upscale ($70k–$130k) kitchen renovations with material and labor line items.
- Bathroom Remodel Cost Guide: Half Bath, Full Bath & Master Suite (2026) Detailed national cost averages for powder rooms ($4k–$8k), guest baths ($10k–$18k), and master ensuite retreats ($25k–$50k+).
- Deck Construction Cost Guide: Pressure-Treated Wood vs Composite (2026) Cost breakdown comparing pressure-treated wood ($22–$35/sq ft) against composite decking ($45–$70/sq ft) over a 20-year ownership lifecycle.
- Hardwood Flooring Installation Cost Guide: Solid, Engineered & LVP (2026) Detailed cost analysis comparing solid hardwood ($10–$18/sq ft), engineered wood ($8–$14/sq ft), and waterproof LVP ($4–$9/sq ft) installed.
How these numbers are produced
Every calculator on RemodelMath is deterministic: the same inputs always produce the same output, and the formula is documented in plain language on the tool page. Where a figure depends on an external benchmark — a published rate, a statutory limit, or an industry cost range — the page cites the publisher and links to it.
We separate inputs you control (balances, rates, dimensions, weights) from assumptions we supply (default rates, waste factors, contingency percentages). Assumption defaults are deliberately conservative and every one of them is editable on the tool page, so you can substitute your own quote or local figure.
Nothing you type is transmitted. The calculations execute in JavaScript in your browser, which means the tools work offline and no personal data is collected.
Frequently asked questions
- Are the RemodelMath calculators free to use?
- Yes. Every calculator and guide on the site is free, runs in your browser, and requires no account. The site is supported by advertising.
- How accurate are the results?
- Each tool documents the formula it uses, the assumptions behind it, and the public data sources it references. Results are planning estimates, not professional advice, and they can differ from quotes or figures you receive from a provider.
- Do you store the numbers I enter?
- No. Calculations run locally in your browser. We do not transmit or store the values you type into the calculators.
- How does RemodelMath keep its content up to date?
- Guides list a publication date and a last-updated date. Pages that rely on published data cite the source and the period the data covers so you can judge how current it is.