How much does a yard of concrete weigh?
4,050lb
per cubic yard, about 2.03 tons
A cubic yard of normal-weight concrete weighs about 4,050 lb — just over 2 US tons. That comes from the standard density of 150 lb per cubic foot × 27 cubic feet. Lightweight mixes run 90–115 lb per cubic foot and weigh proportionally less.
weight = 150 lb per cubic foot × 27 = 4,050 lb per cubic yard
- One cubic yard of concrete weighs about 4,050 lb, or 2.03 US tons
- One cubic foot weighs about 150 lb
- A 4 inch slab weighs about 50 lb per square foot
- A 6 inch slab weighs about 75 lb per square foot
- One cubic metre weighs about 2,400 kg
Weight of a finished slab
| Slab | At 4 in thick | At 6 in thick |
|---|---|---|
| 10 × 10 ft | 5,000 lb (2.5 tons) | 7,500 lb (3.75 tons) |
| 12 × 12 ft | 7,200 lb (3.6 tons) | 10,800 lb (5.4 tons) |
| 20 × 12 ft | 12,000 lb (6 tons) | 18,000 lb (9 tons) |
| 20 × 20 ft | 20,000 lb (10 tons) | 30,000 lb (15 tons) |
Concrete calculator
Slabs, footings and columns — in cubic yards, bags and cost.
Why the weight matters
Weight decides whether a trailer, a lift or a floor can take the load, and it is the reason a truck delivering 10 cubic yards is carrying over 20 tons of concrete before you count the truck itself.
Fresh, cured and bagged
Fresh and cured concrete weigh nearly the same — only a small part of the mix water leaves. Bagged mix quotes a lower figure, near 133 lb per cubic foot, because it describes the product as sold rather than the placed concrete.
Frequently asked questions
How much does a yard of concrete weigh?
About 4,050 lb, or 2.03 US tons, at the standard 150 lb per cubic foot.
How much does a 4 inch slab weigh per square foot?
About 50 lb per square foot: 150 lb/ft³ × 0.333 ft.
How much does a cubic metre of concrete weigh?
About 2,400 kg, which is the metric equivalent of 150 lb per cubic foot.