🔨 Construction & DIY Calculators
Plan your build before you buy. Our construction calculators estimate drywall sheets, deck boards and joists, concrete, lumber, and fasteners from your project dimensions — with waste factors included so you don't end up short on materials mid-project.
Drywall Sheet Calculator
How many drywall sheets, joint compound and screws your room needs.
🪵Deck Board & Joist Calculator
Boards, joists, rim boards and fasteners for your deck build.
🏗️Concrete Slab Calculator
Cubic yards of concrete for your slab plus 80/60/40 lb bag counts, with a waste allowance.
🪨Fence Post Concrete Calculator
How many bags of concrete per fence post, plus the total for your whole fence.
🏠Roof Shingle Calculator
Roofing squares and shingle bundles for your roof size and pitch, with a waste allowance.
🟩Sod Calculator
Square feet of sod, pallets to order and rolls needed for your lawn.
Frequently asked questions
Should I add extra material for waste?
Yes — every calculator on this page adds a sensible waste allowance (typically 10%) for cuts, mistakes, and damaged pieces.
Are material estimates exact?
They're planning estimates based on standard formulas. Always confirm with your supplier or contractor before ordering.
Do these work on a phone at the job site?
Yes — every calculator is mobile-friendly and works offline once the page is loaded.