Free Construction Calculators
Instant material estimates for concrete, roofing, flooring, paint, and more. Built for contractors, estimators, and serious DIYers. No signup. No ads before results.
Why CalcBlueprint?
Every calculator on this site gives you a real number — not a range, not a "contact us for a quote." Enter your measurements, get your materials. That's it.
We use industry-standard formulas from ACI, NRCA, and manufacturer specs. Results are estimates for planning. For complex projects, verify with a licensed contractor or engineer.
Concrete Calculators
Concrete Slab Cost Calculator
Estimate concrete volume and total cost for slabs, patios, and driveways.
Rebar Spacing Calculator
Calculate rebar grid spacing and total linear feet for slabs and footings.
Roofing Calculators
Roof Pitch Calculator
Convert between pitch, angle, and slope. Includes rafter length.
Shingle Calculator
Calculate bundles of shingles needed for your roof area and pitch.