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Calculator collection

Home Project Calculators

Use these calculators for paint, flooring, drywall, tile, concrete, mulch, gravel, topsoil, sod, fencing, decks, wallpaper, and stair carpet planning.

Last reviewed: May 2026

How to use this collection

Measure the project area carefully, choose the right unit, and add waste where material is sold in full sheets, bags, rolls, boxes, yards, or boards.

Buying guidance

For project buying, round up enough to cover cuts, breakage, pattern matching, touch-ups, and future repairs. Confirm exact coverage on the product label.

What to check next

Use related calculators to cross-check material quantities, equipment size, operating cost, and practical buffers before buying products or starting a project.

Tools

Home Projects calculators

Material and cost calculators for practical home improvement jobs.

Home Projects Paint Coverage Calculator Estimate how many gallons of paint to buy based on wall area, doors and windows, number of coats, coverage per gallon, and waste. Home Projects Flooring Cost Calculator Estimate flooring material quantity and project cost using room dimensions, waste percentage, material price, and optional labor cost. Home Projects Mulch Calculator Calculate mulch needs in cubic feet, cubic yards, and bags based on landscape area, desired depth, and bag size. Home Projects Drywall Sheet Calculator Estimate drywall sheet count from wall area, sheet size, number of sides, and waste allowance. Home Projects Tile Calculator Estimate tile quantity from area, tile size, grout layout, and waste for floors, walls, backsplashes, and showers. Home Projects Wallpaper Calculator Estimate wallpaper rolls from wall area, roll coverage, pattern repeat, and waste allowance. Home Projects Concrete Calculator Calculate concrete volume in cubic yards from length, width, thickness, and waste allowance. Home Projects Gravel Calculator Estimate gravel volume in cubic yards and tons from area, depth, and material density. Home Projects Topsoil Calculator Estimate topsoil volume in cubic yards from lawn or garden area and desired depth. Home Projects Sod Calculator Estimate sod rolls or pallets from lawn area, roll coverage, and waste allowance. Home Projects Fence Material Calculator Estimate fence posts, panels, rails, or pickets from total fence length and spacing. Home Projects Deck Board Calculator Estimate deck board count from deck area, board width, board length, gap, and waste allowance. Home Projects Stair Carpet Calculator Estimate stair carpet length from tread depth, riser height, number of stairs, and landing allowance.

Guides

Home Projects supporting guides

Long-tail pages help explain calculator results and give visitors useful buying context.

Home Projects How to Calculate Paintable Wall Area Estimate wall area, subtract openings, plan coats, and add waste before buying paint. Home Projects Flooring Waste Factor Guide Learn how much extra flooring to order for simple rooms, closets, diagonal layouts, and patterned material. Home Projects Mulch Depth and Bag Guide Choose a mulch depth and convert landscape area into bags, cubic feet, or cubic yards. Home Projects How Many Sheets of Drywall Do I Need? Estimate drywall sheet count from wall and ceiling area, sheet size, waste, and project layout. Home Projects How Much Paint for a 12x12 Room? Estimate gallons of paint for a 12 by 12 room using wall height, openings, coats, coverage, and waste. Home Projects Best Painting Supplies for Beginners Build a beginner painting supply list with rollers, brushes, trays, tape, drop cloths, spackle, and prep tools. Home Projects How Many Gallons of Paint for a 12x12 Room? Estimate paint gallons for a 12x12 room by wall height, coats, openings, paint coverage, and waste allowance. Home Projects Complete Paint Coverage Guide A complete guide to estimating paint gallons, wall area, coats, coverage, waste, and beginner painting supplies. Home Projects How the Paint Coverage Works Learn how the paint coverage calculator uses its inputs, formula, assumptions, and examples to produce a practical estimate. Home Projects Paint Coverage Chart and Examples See practical examples, chart-style checkpoints, and common mistakes for the paint coverage calculator. Home Projects How the Flooring Cost Works Learn how the flooring cost calculator uses its inputs, formula, assumptions, and examples to produce a practical estimate. Home Projects Flooring Cost Chart and Examples See practical examples, chart-style checkpoints, and common mistakes for the flooring cost calculator.

Charts

Home Projects charts

Use these chart pages for quick references, printable visuals, and image-search-friendly planning aids.

Home Projects chart Paint Coverage Chart Use this paint coverage chart to estimate gallons for walls, ceilings, coats, and touch-ups.

Recently updated

Recently updated calculators

These calculators are good candidates for seasonal review before demand peaks.

Home Projects Paint Coverage Calculator Estimate how many gallons of paint to buy based on wall area, doors and windows, number of coats, coverage per gallon, and waste. Home Projects Flooring Cost Calculator Estimate flooring material quantity and project cost using room dimensions, waste percentage, material price, and optional labor cost. Home Projects Mulch Calculator Calculate mulch needs in cubic feet, cubic yards, and bags based on landscape area, desired depth, and bag size. Home Projects Drywall Sheet Calculator Estimate drywall sheet count from wall area, sheet size, number of sides, and waste allowance. Home Projects Tile Calculator Estimate tile quantity from area, tile size, grout layout, and waste for floors, walls, backsplashes, and showers. Home Projects Wallpaper Calculator Estimate wallpaper rolls from wall area, roll coverage, pattern repeat, and waste allowance.