SALBCALC

Slabcalc is a free, no-signup concrete calculator built for contractors, builders, and DIYers who need fast, accurate concrete estimates. Pick your project type — slab, cylinder (column or footing), curb, or stairs — enter dimensions in either imperial (feet, inches, yards) or metric, and instantly see total volume in cubic yards and cubic meters, the number of pre-mix bags needed at any common weight (40, 50, 60, or 80 lb), the estimated total weight, and a project cost estimate. A built-in waste factor (0%, 5%, 10%, or 15%) accounts for spillage and uneven ground so the order quantity matches what actually gets poured. The tool also publishes guides, project-cost references, and an analyze feature for larger projects — making it a one-stop reference for concrete planning.