Construction Calculators
Free tools to estimate materials for concrete, paint, flooring, drywall, fencing, roofing and more. Built for DIYers and pros who need fast, practical numbers.
Last updated: September 2026 · 11 free construction calculators
Planning a pour, a paint job, new floors or a fence? These construction calculators help you figure out quantities before you buy — volume, bags, boxes, sheets, posts and gallons — with waste factors built in. Start with the concrete calculator, paint calculator, flooring calculator or fence calculator.
Every tool runs in your browser. No account, no paywall. Each calculator includes practical examples, FAQs and clear how-to guidance so you can order materials with confidence. Need area first? Use the square footage calculator.
Concrete Calculator
Volume, bags and cost for slabs, circular pads and footings.
Open →Gravel Calculator
Cubic yards and tons for driveways, paths and landscaping.
Open →Mulch Calculator
Cubic yards and bags for garden beds at common depths.
Open →Paint Calculator
Gallons for walls and ceilings, with doors, windows and coats.
Open →Flooring Calculator
Hardwood, laminate and vinyl — boxes, waste and cost.
Open →Tile Calculator
Tiles for floors and walls, including grout gap and waste.
Open →Drywall Calculator
Sheets, screws, tape and joint compound for walls and ceilings.
Open →Stair Calculator
Riser, tread, stringer length and angle with IRC guidelines.
Open →Roofing Calculator
Squares, shingle bundles, underlayment and ridge cap.
Open →Fence Calculator
Posts, rails, pickets and concrete bags with gate support.
Open →Square Footage
Area in sq ft, sq m and sq yd — rectangle, circle, triangle.
Open →