Construction
Construction and DIY Calculators
Estimate project quantities for concrete, roofing, paint, flooring, and gravel. Every tool includes its formula, a worked example, limitations, FAQs, and references.
Concrete Calculator
Estimate concrete volume and an approximate 80 lb bag count.
Roofing Calculator
Estimate sloped roof area and roofing squares from footprint and pitch.
Paint Calculator
Estimate paint for walls after openings, coats, and coverage.
Flooring Calculator
Estimate flooring area including a cutting and waste allowance.
Gravel Calculator
Estimate gravel volume and weight for paths, drives, or bases.
Using these tools responsibly
Start with consistent units and realistic inputs. Treat estimates as planning aids and confirm decisions involving safety, regulation, tax, academic policy, or substantial cost with an authoritative source.