Home Improvement Calculators
These calculators cover the materials homeowners buy most often and a few planning estimates for larger systems. Each one shows the exact formula it uses, states its assumptions, and runs locally in your browser so your project details are never uploaded.
Painting
Estimate paint, plan coats, and prep walls with confidence.
Flooring
Measure rooms, plan waste, and estimate flooring and tile.
Flooring CalculatorTurn room dimensions and a waste allowance into square footage and boxes of flooring.Open calculator →Tile CalculatorEstimate the number of tiles and boxes for a floor or wall at any tile size.Open calculator →Square Footage CalculatorFind the square footage of a rectangular space and convert between common units.Open calculator →
Home Maintenance
Plan yard and home upkeep jobs with simple material estimates.
Room Area CalculatorAdd up the area of several rooms and get a running total in square feet.Open calculator →Mulch CalculatorEstimate cubic feet, cubic yards, and bags of mulch for a garden bed.Open calculator →Gravel CalculatorEstimate cubic yards and approximate tons of gravel for a driveway or path.Open calculator →
Roofing
Understand roof measurements and plan roofing materials.
HVAC
Understand heating and cooling basics and maintain your system.
Materials
Estimate concrete and other pour-in-place materials.
How these calculators work
- Local calculations. Every calculator runs in your browser. No project data is transmitted to HomeCostGuide.
- Published formulas. The formula and assumptions are shown on each calculator page so you can verify the result.
- Planning estimates. Results are estimates for planning. Material coverage and site conditions vary, so always confirm against the product label before ordering.