Estimate the weight of a concrete slab, footing or volume from its dimensions, using standard concrete density.
Enter either the slab dimensions or a known volume of concrete, and the tool returns the weight in US tons, tonnes (metric), pounds and kilograms. This matters when you are checking whether a floor, trailer or skip (dumpster) can carry the load, or working out demolition disposal.
| Type | Density |
|---|---|
| Normal reinforced | 2,400 kg/m³ (150 lb/ft³) |
| Plain / unreinforced | 2,300 kg/m³ (144 lb/ft³) |
| Lightweight | 1,600–1,900 kg/m³ |
A 10 ft × 10 ft slab at 4 in deep ≈ 33 ft³. At 150 lb/ft³ that is about 5,000 lb — roughly 2.5 US tons or 2.3 tonnes. The same slab in metric is 0.94 m³ × 2,400 kg/m³ ≈ 2,260 kg.
Tip: broken-up concrete (“hardcore” / rubble) is lighter per volume than a solid slab because of the air gaps — allow about 60–70% of solid weight when filling a skip.
Around 2.4 tonnes (2,400 kg) for standard reinforced concrete. Lightweight mixes weigh less and dense aggregate mixes a little more.
Roughly 1.8 to 2 tonnes (about 3,900 lb), since a cubic yard is 0.765 cubic metres at around 2,400 kg/m³.
It uses 2,400 kg/m³, the standard density for normal-weight reinforced concrete.
Slightly. Wet concrete is a little heavier due to mixing water, and it loses a small amount of weight as it dries and cures.
To check ground or structural load capacity, plan transport and lifting, and ensure a slab or beam is properly supported.
