Are you obtaining ready to construct a deck, sidewalk, patio, or BBQ pit? need to number out how many bags the concrete for post holes or sonotube footings? depending on how large your project and where that located, it might be easier and also cheaper to mix your own than stimulate ready-mix. So, if you’re trying to number out how numerous bags that concrete in a garden for her project, this guide is because that you.

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

In this guide, we’ll discuss how plenty of square feet room in a yard of concrete, various weights that bagged concrete, cubic feet per bag, the number of bags that make up a yard, and how countless bags top top a pallet. We’ll also explain exactly how to calculation the quantity of concrete you’ll need for a slab, fence post, or sonotube, plus what the dry load of a yard runs. This is the ultimate guide for deciding even if it is ready-mix or bagged concrete is best for your project.


Sonotube footings for decks regularly have a deck anchor put into the concrete rather of a part of the post, for this reason they are fully filled with concrete. Calculation the volume of the sonotube utilizing its radius and length or depth that is sunk into the floor (v = π r²h where pi or π = 3.14). The table below indicates the lot of concrete necessary for various diameters that 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 a rock 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 lot Does a yard of Concrete Weigh

A garden of concrete is created of cement, sand, and stone or gravel, otherwise well-known as aggregates. The dry content is bagged and also shipped on pallets. Various grades or strengths use different ratios in the blend, causing varying weights every yard. The load of water added is about half the load of the cement proportion in the mix.

It takes sixty 60lb or forty-five 80lb bags that 4000psi concrete mix to do a garden of concrete. Mathematically, 60×60 = 3600lbs and 45×80 = 3600lbs, so a dried cubic garden of concrete mix would weigh 3600lbs. Including water to the mix increases the average weight to approximately 4000lbs.

Depending top top the manufacturer, the ratio of measures to make the concrete mix, elevations, and temperatures, a yard of concrete might need in between 27 and 35 (or more) US-gallons the water. A us gallon that water weighs 8.34lbs, therefore the number of gallons increases the weight accordingly.

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

How plenty of Yards of Concrete in a Truck

The quantity of weight a truck can carry depends on what that is designed to carry. Some factors affecting lots are wherein it is traveling and when. Hills and also bridges can restrict pack sizes, and also weight constraints may vary between jurisdictions and also even seasonally. Additionally, statutory us weight boundaries of 80,000 pounds ~ above tractor-trailers restrict tons to in between 43,000 and also 47,000 pounds, as do 48,000 pounds on 3-axle cement trucks.

On mean most ready-mix concrete trucks lug 10.5 yards or 42,000 pounds, back 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 garden of dried mix.

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To determine your vehicle’s transferring capacity, recognize the GVWR and subtract the curb weight. A 1/2-ton truck v a 6600lb GVWR and also a curb weight of 5100lbs, has actually a pack capacity of 1500lbs, consisting of the driver, passengers, and also cargo. It no recommended to exceed the pack capacity.