🔨 21 Calculators · 14 Topics · Updated April 2026
DIY & Home Improvement Calculators
Free DIY calculators for wallpaper, tile, mulch, carpet, topsoil, and home improvement projects. Calculate materials with waste allowance.
Plan your home improvement projects with accurate material estimates. Calculate wallpaper rolls, tile quantities, mulch volume, carpet area, and more, all with built-in waste allowances so you buy the right amount the first time.
Most Popular
Tile Calculator
Calculate tiles needed for floor, wall, or backsplash.
Wallpaper Calculator
Calculate how many rolls of wallpaper you need for a room.
Mulch Calculator
Calculate how many cubic yards of mulch you need for garden beds and landscaping.
Carpet Area Calculator
Calculate square yards of carpet needed with waste.
Browse by Topic
Flooring
2 calculatorsTile, carpet, and flooring material calculators.
Landscaping
1 calculatorMulch, topsoil, and outdoor material calculators.
Interior
1 calculatorWallpaper, blinds, and interior finish calculators.
Outdoor
2 calculatorsShed, patio, and outdoor project estimators.
Lawn
3 calculatorsPaint
1 calculatorWalls
1 calculatorSealants
1 calculatorExterior
1 calculatorHVAC
3 calculatorsHeating
2 calculatorsDecking
1 calculatorYard
1 calculatorPainting
1 calculatorFrequently Asked Questions
How much extra material should I buy?
Plan for 10% extra for straight-cut installations. For diagonal, herringbone, or complex patterns, buy 15-20% extra. First-time DIYers should add an additional 5%.
Do I need permits for home improvement?
Generally, cosmetic changes (paint, flooring, fixtures) do not need permits. Structural changes, electrical work, plumbing, and projects that change the footprint usually do. Check with your local building department.