What This Calculator Does
This tool estimates how much a poured concrete slab weighs, based on its volume and the density of the concrete mix used.
The Formula
Volume is calculated as length × width × thickness (with thickness converted from inches to feet), and total weight is volume × density. Standard normal-weight concrete is commonly assumed at about 150 lb per cubic foot, though the exact figure depends on the aggregate and mix design, so this calculator lets you adjust the density.
Knowing the weight of a concrete pour is useful for estimating truck loads, crane lifting capacity, and structural dead-load calculations. For precise structural load calculations, use the specific mix density from your concrete supplier and consult a structural engineer.
Last reviewed August 2026