How Much Does 6 Yards of Concrete Weigh?

6 yards of concrete weighs about 24,300 lb, which is 12.15 US tons or 11,022 kg, for normal concrete at 150 lb per cubic foot. That is 60% of a 10-yard ready-mix truck.

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Weight

24,300 lb

12.15 US tons, at 150 lb/ft³

What to buy

Bags of 80 lb mix one payload carriesPayload ÷ dry bag weight, rounded down. That is 1,440 lb of bags; the driver and other cargo count against the payload18 bags
Bags of 80 lb mix this slab would needAt about 0.30, 0.45 and 0.60 ft³ per 40, 60 and 80 lb bag (Quikrete data sheets)270 bags

In US tons: 12.15 tons
In kilograms: 11,022 kg
Weight per square foot: 150.0 lb/ft²
Volume: 162.00 ft³
Volume in cubic yards: 6.00 yd³

Bagged mix in a truck

Truck trips for those bags: 15 trips

Concrete weighs about 150 lb per cubic foot (4,050 lb per cubic yard), or 12.5 lb per square foot for every inch of thickness. Plain concrete with no steel is about 145 lb per cubic foot and reinforced concrete about 150 (FHWA Lightweight Concrete Bridge Design Primer, 2021, report FHWA-HIF-19-067). Lightweight concrete is much lighter, and the 115 and 160 lb per cubic foot choices are rough figures that are not from that source: ask your supplier for the real density of the mix. A 4 inch slab weighs about 50 lb per square foot. Check that a deck, roof or the ground can carry the weight.

Before you buy: round up to whole packs, check the size printed on the label, and add a little spare. Your supplier has the final say.

Blueprint

6.00 yd³ · 270 bags

6 yards of concrete by type

A cubic yard is 27 cubic feet, so 6 yards is 162 cubic feet. Multiply by the weight of a cubic foot of the concrete you are using.

Type of concrete	Density	Weight	US tons	Kilograms
Lightweight concrete, a rough figure	115 lb/ft³	18,630 lb	9.32	8,450
Plain concrete, no steel	145 lb/ft³	23,490 lb	11.75	10,655
Reinforced concrete, and the usual rule of thumb	150 lb/ft³	24,300 lb	12.15	11,022
Heavily reinforced, a rough figure	160 lb/ft³	25,920 lb	12.96	11,757

The slab 6 yards makes, and what it weighs per square foot

The total stays at 24,300 lb. A thinner slab spreads it over more ground.

Slab thickness	Area from 6 yards	Weight per sq ft	Total weight
3 in	648 sq ft	37.5 lb	24,300 lb
4 in	486 sq ft	50.0 lb	24,300 lb
5 in	389 sq ft	62.5 lb	24,300 lb
6 in	324 sq ft	75.0 lb	24,300 lb
8 in	243 sq ft	100.0 lb	24,300 lb

Six yards: a two-car garage floor

6 yards weighs 24,300 lb, 12.15 tons. At 4 inches thick it covers 486 square feet, and a 20x24 slab at 4 inches takes 5.93 cubic yards and weighs 24,000 lb.

A garage floor is often poured thicker than a patio. At 6 inches the same 6 yards covers 324 square feet and loads the base with 75.0 lb per square foot instead of 50.0, so the gravel under it matters more.

Worked example

6 × 27 = 162 cubic feet. 162 × 150 lb = 24,300 lb. 24,300 ÷ 2,000 = 12.15 US tons.

Nearby amounts

Concrete	Cubic feet	Weight	US tons	Truck loads
3 yards	81 ft³	12,150 lb	6.08	1
4 yards	108 ft³	16,200 lb	8.10	1
5 yards	135 ft³	20,250 lb	10.13	1
6 yards	162 ft³	24,300 lb	12.15	1
8 yards	216 ft³	32,400 lb	16.20	1
10 yards	270 ft³	40,500 lb	20.25	1
12 yards	324 ft³	48,600 lb	24.30	2

For a slab, wall or footing of your own size use the concrete weight calculator, and the concrete calculator for how many yards to order. The guide how much does concrete weigh has the weights per square foot. Hauling bagged mix yourself? See how many 80 lb bags a pickup can carry.

Want to change anything else? The calculator above is the full Concrete Weight Calculator: edit any number and the results update instantly.

Tools & materials for this project

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