How much does a yard of concrete weigh?

About 4,050 lb, or 2.03 US tons, at 150 lb per cubic foot × 27 cubic feet. Inch Calculator puts standard concrete at 3,700–4,220 lb a cubic yard, so the mix moves it a little either way. Bought as bags, a yard is 45 bags of 80 lb, 3,600 lb of dry mix, because the mix weighs less than the concrete it makes once you add the water.

How much does a concrete slab weigh per square foot?

50 lb per square foot at 4 inches thick, 62.5 lb at 5 inches and 75 lb at 6 inches: the thickness in feet × 150 lb. A 10 × 10 ft slab 4 inches thick weighs 5,000 lb.

Does cured concrete weigh less than wet concrete?

A little: fresh concrete holds all its mixing water, and part of it leaves as the concrete dries. The published figures HomeMath uses don't separate the two, so it weighs both at 150 lb per cubic foot, Dumpsters.com's figure for a solid slab, and offers Quikrete's 140 lb for its bagged mix as it comes out of the mixer.

How much does rebar add to a slab's weight?

Little. #4 bars 12 inches apart each way add 1.34 lb per square foot, against 50 lb of concrete in a 4 inch slab, about 2.7% more. Tick the rebar grid to add it for your bar and spacing.

How much does a cubic meter of concrete weigh?

About 2,403 kg, 2.40 tonnes: 150 lb per cubic foot converted exactly. Inch Calculator rounds it to 2,400 kg per cubic meter. Switch the calculator to metric for meters, kilograms and tonnes.

How much does a concrete block weigh?

It depends on the block, so the weight calculator doesn't do blocks: it weighs poured concrete. The concrete block calculator counts the blocks for a wall and the concrete to fill their cores.

Concrete Weight Calculator

A cubic yard of concrete weighs about 4,050 lb, 2.03 US tons, at the usual 150 lb per cubic foot. Enter a slab, a footing, a round column or a volume to get its weight in pounds, tons and kilograms, per cubic yard and per square foot of slab, with a rebar grid added if the slab is reinforced, the dumpsters it would fill once it comes out, and the loads at your truck's payload.

Units

LengthWidthThickness (in)

How manyConcrete

Typical concrete: a solid slab or a typical mix, by Dumpsters.com and Inch Calculator.

Reinforced with a rebar grid

Truck payload, optional (lb)

5,000 lb (2.50 tons) of concrete

In kilograms:: 2,268 kg (2.27 t)
Volume:: 1.23 cu yd (33.33 cu ft)
Per cubic yard:: 4,050 lb (2.03 tons)
Per sq ft of slab:: 50.0 lb per sq ft
10 yard dumpsters at a 10 ton limit, if broken out:: 1 dumpster

Need the volume in yards and bags instead? Use the concrete calculator; taking out an old slab, the concrete removal cost calculator.

How HomeMath calculates concrete weight

HomeMath works out the volume first, as the concrete calculator does (length × width × thickness, or π × radius² × height), and multiplies it by the weight per cubic foot: 150 lb for typical concrete, 4,050 lb a cubic yard. A reinforced slab adds the steel: two layers of bars, one each way, at the spacing, × the bar's weight per foot. Tons are pounds ÷ 2,000, and the weight per square foot is the thickness in feet × the weight per cubic foot. In metric the weight comes out in kilograms and tonnes.

The published rules it uses: concrete weight; rebar sizes and mesh; removal, weight and hauling; US customary units; metric conversion. Their sources, and how HomeMath tests every result, are on the about page.

What common pours weigh

At 150 lb per cubic foot, before any rebar.

1 cubic yard4,050 lb (2.03 tons)
6 cubic yards24,300 lb (12.15 tons)
10 × 10 ft slab, 4 in thick5,000 lb (2.50 tons)
12 × 12 ft pad, 6 in thick10,800 lb (5.40 tons)
16 × 40 ft driveway, 4 in thick32,000 lb (16.00 tons)
40 ft of footing, 16 in wide, 8 in deep5,333 lb (2.67 tons)
One 12 in pier, 4 ft deep471 lb (0.24 tons)
1 cubic foot150 lb (0.08 tons)

What do half a yard to 10 yards of concrete weigh?

A cubic yard is 27 cubic feet, so a yard of typical concrete weighs 27 × 150 = 4,050 lb, just over 2 US tons. Inch Calculator gives standard concrete 3,700–4,220 lb a cubic yard. The table runs from half a yard to a full truck's worth.

Concrete weight per cubic yard, at 150 lb/cu ft
Volume	Pounds	US tons	Kilograms
0.5 cu yd	2,025 lb	1.01 tons	919 kg
1 cu yd	4,050 lb	2.03 tons	1,837 kg
2 cu yd	8,100 lb	4.05 tons	3,674 kg
3 cu yd	12,150 lb	6.08 tons	5,511 kg
4 cu yd	16,200 lb	8.10 tons	7,348 kg
5 cu yd	20,250 lb	10.13 tons	9,185 kg
6 cu yd	24,300 lb	12.15 tons	11,022 kg
8 cu yd	32,400 lb	16.20 tons	14,696 kg
10 cu yd	40,500 lb	20.25 tons	18,370 kg

What does a concrete slab weigh per square foot?

A slab's weight per square foot is its thickness in feet × 150 lb: a 4 inch slab is 4 ÷ 12 × 150 = 50 lb per square foot. Multiply by the area for the whole slab, or use the table.

Weight per square foot by thickness
Thickness	Per sq ft	Per m²
3 in	37.5 lb per sq ft	183.1 kg per m²
4 in	50.0 lb per sq ft	244.1 kg per m²
5 in	62.5 lb per sq ft	305.2 kg per m²
6 in	75.0 lb per sq ft	366.2 kg per m²
8 in	100.0 lb per sq ft	488.2 kg per m²
12 in	150.0 lb per sq ft	732.4 kg per m²

How do I work out the weight of concrete by hand?

Take a 12 × 16 ft patio, 4 inches thick.

Volume: 12 × 16 × 0.333 = 64 cu ft.
Weight: 64 × 150 = 9,600 lb.
Tons: 9,600 ÷ 2,000 = 4.80 US tons; in kilograms, × 0.4536 = 4,354 kg.

For a round pier or hole, the volume is π × radius² × depth: a 12 inch pier 4 ft deep holds 3.14 cu ft and weighs 471 lb.

Does wet, cured or reinforced concrete weigh more?

Cured concrete: a solid slab weighs 150 lb per cubic foot by Dumpsters.com, the figure the calculator starts with and the one the removal estimates use.
Wet concrete: it holds all its mixing water, and part of it leaves as the slab dries. The published figures here don't give the difference; Quikrete gives its bagged Concrete Mix about 140 lb per cubic foot freshly mixed, which the calculator offers for bagged pours.
Reinforced concrete: the steel adds its own weight, little against the concrete. Tick the rebar grid to add it.

Rebar grid steel, and how much it adds to a 4 in slab
Grid	Steel	Of the concrete
#3 at 12 in each way	0.75 lb per sq ft	1.5%
#3 at 18 in each way	0.50 lb per sq ft	1.0%
#4 at 12 in each way	1.34 lb per sq ft	2.7%
#4 at 18 in each way	0.89 lb per sq ft	1.8%
#5 at 12 in each way	2.09 lb per sq ft	4.2%
#5 at 18 in each way	1.39 lb per sq ft	2.8%

The rebar calculator counts the bars and sticks for the same slab; #4 bars weigh 0.668 lb a foot.

What do lightweight and bagged concrete weigh?

The calculator starts at 150 lb per cubic foot and offers the others below; Inch Calculator gives lightweight concrete 2,360–3,120 lb a cubic yard. You can also type your own figure from a mix design or a supplier's ticket.

The weights the calculator offers
Concrete	Per cu ft	Per cu yd	Per m³
Typical concrete	150 lb/cu ft	4,050 lb/cu yd	2,403 kg/m³
Bagged mix, fresh	140 lb/cu ft	3,780 lb/cu yd	2,243 kg/m³
Lightweight concrete	101.5 lb/cu ft	2,740 lb/cu yd	1,626 kg/m³

How much concrete fits in a dumpster or on a truck?

A 10 yard dumpster for concrete usually allows 10 tons, by Dumpsters.com. That is 4.9 cubic yards of solid concrete, or about 400 sq ft of a 4 inch slab, so concrete reaches the weight limit long before it fills the box. Broken up, it takes about twice the space of the slab it came from. A pickup or trailer carries what the payload sticker in the driver's door allows; type it and the calculator counts the loads.

Common slabs and the dumpsters they fill
Slab	Weight	Dumpsters
10 × 10 ft, 4 in	5,000 lb (2.50 tons)	1 dumpster
10 × 12 ft, 4 in	6,000 lb (3.00 tons)	1 dumpster
12 × 12 ft, 4 in	7,200 lb (3.60 tons)	1 dumpster
12 × 24 ft, 4 in	14,400 lb (7.20 tons)	1 dumpster
20 × 20 ft, 4 in	20,000 lb (10.00 tons)	1 dumpster
20 × 20 ft, 6 in	30,000 lb (15.00 tons)	2 dumpsters
24 × 24 ft, 6 in	43,200 lb (21.60 tons)	3 dumpsters
30 × 40 ft, 4 in	60,000 lb (30.00 tons)	3 dumpsters

To price taking a slab out, use the concrete removal cost calculator; the rebar calculator counts the bars for a reinforced slab, and the cubic yards to tons calculator weighs gravel and sand.

What does concrete weigh in metric?

Switch to metric and the sizes go in meters and centimeters; the weight comes out in kilograms and tonnes. Typical concrete at 150 lb per cubic foot is 2,403 kg per cubic meter, which Inch Calculator rounds to 2,400. A 3 × 3 m slab 10 cm thick is 0.9 m³ and weighs about 2,162 kg.

Frequently asked questions

How much does a yard of concrete weigh?: About 4,050 lb, or 2.03 US tons, at 150 lb per cubic foot × 27 cubic feet. Inch Calculator puts standard concrete at 3,700–4,220 lb a cubic yard, so the mix moves it a little either way. Bought as bags, a yard is 45 bags of 80 lb, 3,600 lb of dry mix, because the mix weighs less than the concrete it makes once you add the water.
How much does a concrete slab weigh per square foot?: 50 lb per square foot at 4 inches thick, 62.5 lb at 5 inches and 75 lb at 6 inches: the thickness in feet × 150 lb. A 10 × 10 ft slab 4 inches thick weighs 5,000 lb.
Does cured concrete weigh less than wet concrete?: A little: fresh concrete holds all its mixing water, and part of it leaves as the concrete dries. The published figures HomeMath uses don't separate the two, so it weighs both at 150 lb per cubic foot, Dumpsters.com's figure for a solid slab, and offers Quikrete's 140 lb for its bagged mix as it comes out of the mixer.
How much does rebar add to a slab's weight?: Little. #4 bars 12 inches apart each way add 1.34 lb per square foot, against 50 lb of concrete in a 4 inch slab, about 2.7% more. Tick the rebar grid to add it for your bar and spacing.
How much does a cubic meter of concrete weigh?: About 2,403 kg, 2.40 tonnes: 150 lb per cubic foot converted exactly. Inch Calculator rounds it to 2,400 kg per cubic meter. Switch the calculator to metric for meters, kilograms and tonnes.
How much does a concrete block weigh?: It depends on the block, so the weight calculator doesn't do blocks: it weighs poured concrete. The concrete block calculator counts the blocks for a wall and the concrete to fill their cores.