Are you gaining ready to develop a deck, sidewalk, patio, or BBQ pit? require to number out how many bags of concrete for post holes or sonotube footings? relying on how large your project and where it’s located, it may be easier and also cheaper come mix your very own than bespeak ready-mix. So, if you trying to figure out how many bags the concrete in a yard for your project, this overview is for you.

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To mix a garden of 4000psi concrete you’ll require ninety 40lb, seventy-two 50lb, sixty 60lb, forty-five 80lb, or fourty 90lb bags of mix. A dry garden of concrete weighs about 3600lbs and needs 32 come 34 gallons that water. A yard of concrete will certainly make a 4” thick, 81ft² slab.

In this guide, we’ll comment on how many square feet room in a garden of concrete, different weights the bagged concrete, cubic feet every bag, the variety of bags that consist of a yard, and how numerous bags on a pallet. We’ll also explain exactly how to calculate the quantity of concrete you’ll require for a slab, fence post, or sonotube, plus what the dry weight of a garden runs. This is the ultimate overview for deciding even if it is ready-mix or bagged concrete is best for her project.


Sonotube footings because that decks frequently have a deck anchor placed into the concrete rather of a section of the post, so they are completely filled through concrete. Calculate the volume that the sonotube utilizing its radius and length or depth that is sunk into the floor (v = π r²h whereby pi or π = 3.14). The table below indicates the quantity of concrete essential for various diameters of 4-foot sonotube lengths.

Concrete for Sonotube Deck Footings
Sonotube DiameterVolume60lb Bag (0.45ft³)80lb Bag (0.6ft³)
8” x 4ft1.393ft³3.1 or 4 bags

(or 3 bags and also a absent or two)

2.32 or 3 bags
10” x 4ft2.181ft³4.84 or 5 bags3.635 or 4 bags
12” x 4ft3.14ft³6.98 or 7 bags5.23 or 6 bags

How much Does a yard of Concrete Weigh

A yard of concrete is written of cement, sand, and stone or gravel, otherwise recognized as aggregates. The dry contents is bagged and shipped on pallets. Various grades or toughness use different ratios in the blend, leading to varying weights every yard. The load of water added is about fifty percent the load of the cement ratio in the mix.

It bring away sixty 60lb or forty-five 80lb bags that 4000psi concrete mix to make a garden of concrete. Mathematically, 60×60 = 3600lbs and also 45×80 = 3600lbs, for this reason a dry cubic yard of concrete mix would weigh 3600lbs. Adding water to the mix increases the mean weight to roughly 4000lbs.

Depending on the manufacturer, the ratio of steps to do the concrete mix, elevations, and also temperatures, a yard of concrete may need in between 27 and 35 (or more) US-gallons that water. A us gallon that water weighs 8.34lbs, therefore the number of gallons boosts the weight accordingly.

Water is essential for the chemical reaction to harden the powder mix. However, although that doesn’t readjust the as whole finished volume much, it does readjust the early stage weight. As the concrete cures, much of the water evaporates, reduce the weight to about 3700lbs.

How many Yards that Concrete in a Truck

The quantity of load a truck can lug depends on what it is designed come carry. Some factors affecting lots are where it is traveling and when. Hills and bridges deserve to restrict fill sizes, and also weight limitations may vary in between jurisdictions and even seasonally. Additionally, statutory united state weight borders of 80,000 pounds top top tractor-trailers restrict lots to in between 43,000 and 47,000 pounds, as do 48,000 pounds top top 3-axle cement trucks.

On median most ready-mix concrete trucks lug 10.5 yards or 42,000 pounds, return some bring 12.5 yards. A 48’ tractor-trailer regularly carries 14 yards, delivery trucks 2 come 3 yards, and also a half-ton truck about a 3rd of a yard of dry mix.

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To identify your vehicle’s delivering capacity, determine the GVWR and also subtract its curb weight. A 1/2-ton truck v a 6600lb GVWR and a curb load of 5100lbs, has actually a fill capacity of 1500lbs, including the driver, passengers, and cargo. It isn’t recommended come exceed the load capacity.