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RenovationCost Lab

Home Improvement Cost Calculators

Every tool uses transparent formulas, a materials-vs-labor breakdown, editable prices, and a clear disclaimer. Results are for budgeting — not contractor quotes.

CalculatorWindows & Doors

Window Replacement

Estimate the cost to replace windows by entering quantities, sizes, frame material, labor, and removal — with a materials vs. labor breakdown.

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CalculatorInsulation & Energy

Attic Insulation

Estimate the cost to insulate an attic by entering area, insulation type, target R-value, existing condition, air sealing, and labor — with a materials vs. labor breakdown.

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CalculatorFlooring

Garage Epoxy Floor

Estimate the cost to coat a garage floor with epoxy or polyaspartic — entering floor size, coating system, surface prep, coats, and crack repair for a materials vs. labor breakdown.

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CalculatorRoofing & Gutters

Gutter Replacement

Estimate the cost to replace gutters by entering linear footage, material, profile, corners, downspouts, access difficulty, and removal — with a materials vs. labor breakdown.

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CalculatorDecks & Outdoor

Deck Building

Estimate the cost to build a deck by entering size, decking material, height, railing, stairs, and foundation — with a materials vs. labor breakdown.

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CalculatorPainting & Drywall

Interior Painting

Estimate interior painting cost from room dimensions — paint, primer, and labor — using perimeter-based paintable wall area with standard door and window deductions.

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CalculatorFlooring

Flooring Installation

Estimate flooring installation cost across multiple rooms by entering room dimensions (or manual area), material, waste, subfloor prep, removal, underlayment, labor, and trim — with a materials vs. labor breakdown.

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CalculatorRepair or Replace

Repair vs Replace

Compare the annualized cost of repairing versus replacing an item using your own cost and useful-life assumptions — with a cost-only break-even.

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How these calculators are built

Each calculator is a deterministic tool: the same inputs and data version always produce the same result. Prices ship as editable planning assumptions, clearly labeled — never as verified national averages. See our pricing methodology.