7 free calculators
Home Improvement & Material Calculators
Plan material quantities for US home projects using feet, inches, square feet, cubic yards and US gallons. Each calculator explains the measurement method, shows a worked example and lets you adjust waste or coverage assumptions. These quantity estimates do not design structures or replace a supplier quote.
Choose a question to explore
Plan an interior room project
Measure floor area first, then estimate tile, wall paint or drywall. Each tool handles its own coverage and waste assumptions.
Estimate outdoor material volume
Use feet for length and width, inches for depth, and cubic yards for bulk orders. Mulch also supports whole-bag estimates.
Compare framing and lumber quantities
Drywall estimates sheet area and basic straight-wall stud counts. Board feet measure lumber volume rather than piece spacing.
- Square Footage Calculator: Feet, Inches & Flooring AreaCalculate room square footage from feet and inches, convert to square yards, and add a flooring waste allowance. Includes a worked US room example.Open calculator →
- Concrete Slab Calculator: Cubic Yards & Cubic FeetEstimate concrete slab volume in cubic yards and cubic feet using feet-and-inches dimensions, thickness in inches, and an adjustable extra allowance.Open calculator →
- Mulch Calculator: Cubic Yards & BagsCalculate mulch in cubic yards, cubic feet and whole bags from bed dimensions and depth in inches. Adjust bag volume and extra allowance.Open calculator →
- Paint Calculator: Room Coverage & US GallonsEstimate paint gallons for room walls and optional ceilings with doors and windows deducted, multiple coats, product coverage and extra allowance.Open calculator →
- Tile Calculator: Floor Area, Tiles & BoxesEstimate floor or wall tile quantities and whole boxes using room dimensions in feet, tile sizes in inches, and adjustable cutting waste.Open calculator →
- Drywall Calculator: Sheets & Straight-Wall StudsEstimate drywall sheets and straight-wall studs using US dimensions, one or two covered faces, opening deductions, stud spacing and waste.Open calculator →
- Board Foot Calculator: Lumber VolumeCalculate lumber board feet from thickness and width in inches, length in feet and whole-piece count. Includes worked examples and nominal-size guidance.Open calculator →