A row of ready-mix concrete trucks waiting to load

Reference

How much does concrete weigh per cubic foot and yard

Concrete is heavy enough that its weight is the first thing to check before you load a trailer, pour on a deck or an upper floor, or fill a dumpster — and it is a plain multiplication once you know the density.

How much does concrete weigh? About 150 lb per cubic foot and 4,050 lb per cubic yard — two tons a yard, 2,400 kg per cubic meter. A 4 in slab weighs 50 lb per square foot.

How much does a yard of concrete weigh, by type

ACI 318 uses 145 lb/ft³ for plain normal-weight concrete and 150 lb/ft³ with reinforcing steel; 150 is the planning figure used here. Fresh concrete weighs a few percent more than hardened, air-dry concrete; the difference is water that evaporates as it dries.

Concrete	Per cubic foot	Per cubic yard	Per cubic meter
Normal-weight concrete	150 lb	4,050 lb · 2.03 tons	2,400 kg
Structural lightweight	110 lb	2,970 lb · 1.49 tons	1,760 kg
Insulating lightweight	50 lb	1,350 lb · 0.68 tons	800 kg
Heavyweight (shielding)	250 lb	6,750 lb · 3.38 tons	4,000 kg

How much does a concrete slab weigh

Area times thickness in feet times 150. The per-square-foot column is the one to use for a floor load; the slab-size columns are what the demolition dumpster has to take.

Thickness	Per sq ft	Per m²	10 × 10 ft	12 × 12 ft	20 × 20 ft	24 × 24 ft
2 in	25 lb	122 kg	2,500 lb · 1.3 tons · 1.1 t	3,600 lb · 1.8 tons · 1.6 t	10,000 lb · 5.0 tons · 4.5 t	14,400 lb · 7.2 tons · 6.5 t
4 in	50 lb	244 kg	5,000 lb · 2.5 tons · 2.3 t	7,200 lb · 3.6 tons · 3.3 t	20,000 lb · 10.0 tons · 9.1 t	28,800 lb · 14.4 tons · 13.1 t
6 in	75 lb	366 kg	7,500 lb · 3.8 tons · 3.4 t	10,800 lb · 5.4 tons · 4.9 t	30,000 lb · 15.0 tons · 13.6 t	43,200 lb · 21.6 tons · 19.6 t
8 in	100 lb	488 kg	10,000 lb · 5.0 tons · 4.5 t	14,400 lb · 7.2 tons · 6.5 t	40,000 lb · 20.0 tons · 18.1 t	57,600 lb · 28.8 tons · 26.1 t

How many yards in a concrete truck

A typical mixer drum holds 10–11 cubic yards, and most trucks deliver 8–10 yards a load. At about 9 cubic yards that is 36,450 lb of concrete on a truck that weighs around 27,000 lb empty — roughly 63,450 lb, close to the 66,000 lb a typical four-axle mixer is allowed to gross; limits vary by axle count and state. Small orders, often under 4–6 yards, carry a short-load fee, and that gross weight is why many contractors keep a mixer off a residential driveway and pour from the street.

Bagged concrete yields

Bagged mix comes in 40, 50, 60 and 80 lb bags; yields per bag, bags per yard and mix ratios are on the concrete bag yields guide.

The concrete calculator turns a slab into yards, bags and a truck order.

Figure your slab →

Densities: Portland Cement Association, Concrete Basics — normal-weight concrete about 140–150 lb/ft³ (2,400 kg/m³); ACI 318 design densities (145 plain, 150 reinforced); ACI 213R-14, Guide for Structural Lightweight-Aggregate Concrete (about 70–120 lb/ft³, 110 typical); ACI 304.3R for heavyweight concrete; insulating lightweight per ACI 523. Truck figures are typical for US four-axle transit mixers — 10–11 yd³ drums, 8–10 yd³ loads, about 27,000 lb empty and 66,000 lb gross under the federal bridge formula (FHWA) — and vary by axle count and state; check your supplier. Pickup payload: manufacturer ratings for half-ton trucks. Accessed 2026-10-14. Densities vary with the aggregate; 150 lb/ft³ is the planning figure engineers use for normal-weight concrete.

Concrete weight questions

How much does a cubic yard of concrete weigh?

About 4,050 lb, or two tons. A yard is 27 cubic feet at 150 lb each.

How much does a 4 inch concrete slab weigh per square foot?

50 lb. A 10 × 10 ft patio at 4 in weighs 5,000 lb.

How much does a concrete truck weigh?

Around 27,000 lb empty and about 63,450 lb loaded with 9 yards, close to the 66,000 lb a typical four-axle mixer may gross.

Can a pickup truck carry a yard of concrete?

No. A yard of wet concrete is about 4,050 lb; a half-ton pickup is rated for roughly 1,500–2,000 lb of payload. Haul bags, or have it delivered.

Does concrete get lighter as it dries?

Slightly — fresh concrete weighs a few percent more than hardened, air-dry concrete; the difference is water that evaporates as it dries.

Put these figures to work

These numbers are the inputs every concrete calculator on the site runs on — slabs, footings, steps and the posts set in them. Each tool applies them to one part of the job.

Tools for the job

What makes this job easier

Tools and materials that suit this kind of job. These are affiliate links: if you buy through one, Renovimo may earn a commission at no extra cost to you. It never changes the figures on this page.