How Much Does 15 Yards of Concrete Weigh?

15 yards of concrete weighs about 60,750 lb, which is 30.38 US tons or 27,556 kg, for normal concrete at 150 lb per cubic foot. That is 2 ready-mix trucks of around 10 yards.

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Weight

60,750 lb

30.38 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)675 bags

In US tons: 30.38 tons
In kilograms: 27,556 kg
Weight per square foot: 150.0 lb/ft²
Volume: 405.00 ft³
Volume in cubic yards: 15.00 yd³

Bagged mix in a truck

Truck trips for those bags: 38 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

15.00 yd³ · 675 bags

15 yards of concrete by type

A cubic yard is 27 cubic feet, so 15 yards is 405 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	46,575 lb	23.29	21,126
Plain concrete, no steel	145 lb/ft³	58,725 lb	29.36	26,637
Reinforced concrete, and the usual rule of thumb	150 lb/ft³	60,750 lb	30.38	27,556
Heavily reinforced, a rough figure	160 lb/ft³	64,800 lb	32.40	29,393

The slab 15 yards makes, and what it weighs per square foot

The total stays at 60,750 lb. A thinner slab spreads it over more ground.

Slab thickness	Area from 15 yards	Weight per sq ft	Total weight
3 in	1,620 sq ft	37.5 lb	60,750 lb
4 in	1,215 sq ft	50.0 lb	60,750 lb
5 in	972 sq ft	62.5 lb	60,750 lb
6 in	810 sq ft	75.0 lb	60,750 lb
8 in	608 sq ft	100.0 lb	60,750 lb

Fifteen yards: a driveway pour

15 yards of concrete weighs 60,750 lb, 30.38 tons, and takes 2 trucks of around 10 yards each. It covers 1,215 square feet at 4 inches, 972 at 5 inches or 810 at 6 inches.

That is 405 cubic feet in all. With heavy reinforcement at 160 lb per cubic foot the weight rises to 64,800 lb, which matters if the slab sits on a structure and not on the ground.

Worked example

15 × 27 = 405 cubic feet. 405 × 150 lb = 60,750 lb. 60,750 ÷ 2,000 = 30.38 US tons.

Nearby amounts

Concrete	Cubic feet	Weight	US tons	Truck loads
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
15 yards	405 ft³	60,750 lb	30.38	2
20 yards	540 ft³	81,000 lb	40.50	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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