Free Construction Calculators

Calculate how many standard 16×8 in concrete blocks you need for any wall — with mortar and a waste allowance.

Calculate exactly how much concrete you need for a slab, footing, post hole, column or wall — in cubic yards, cubic feet and bags, with cost estimates.

Convert any volume between cubic feet, cubic yards, cubic inches, cubic meters and gallons — or calculate it from length, width and height.

Calculate board feet and cost for any lumber size — 2×4, 2×6, 4×4 and more — in seconds.

Calculate the square footage of any room, house or surface — rectangles, circles, triangles, L-shapes and more — in square feet, inches and meters.