Building your own concrete slab, patio driveway or walkway is great home advancement and most diy residence handymen are capable of perfect this type of project. All the is required is some knowledge and also the right tools.

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### Concrete (Sonotube) or Column

Download a cost-free automatic ready-mix, by the yard and also quantities compelled of 60 lb. And 80 lb. Pre-mixed bags - concrete calculator - (you must have Microsoft Excel or various other compatible spreadsheet program)

Information ~ above concrete sealers.

Information on hand mixing concrete.

It have to be detailed that cement, is just one of the 4 item that provides up concrete. Concrete is a mixture that cement, aggregate, sand and also water.

### Square or Rectangle Concrete Slab: Notes:

Pre-mix concrete comes in bags that are 60 lbs. And also 80 lbs.A 60 lb. Bag offers 0.45 cubic feet of cured concrete.A 80 lb. Bag gives 0.6 cubic feet of cured concrete.If you have concrete yielded it is offered by the yard (which is a cubic yard = 27 cubic feet).

Following space the recipe to calculate exactly how much concrete you will require for a square or rectangle-shaped shaped pour:

L (feet) x W (feet) x T (inches) ÷ 12 = cubic feet that concrete (CF)Number the bags of concrete needed:CF ÷ 0.45 = number of 60 lb. BagsCF ÷ 0.6 = number of 80 lb. BagsNumber that cubic yards the concrete needed:CF ÷ 27 = cubic yardsL = length in feetW = width in feetT = Thickness in inchesCF = Cubic feet of concrete

### Example:

A patio 10' long by 8' large - 6″ thick

10 x 8 x 6 ÷ 12 = 40 cubic feet of concrete

10 x 8 x 6 ÷ 12 = 40 cubic feet the concrete

40 ÷ 0.6 = 67 (66.7) 80 lb. Bags of concrete

40 ÷ 27 = 1.5 cubic yards that concrete

### Circular Concrete Slab: Notes:

Pre-mix concrete come in bags that are 60 lbs. And also 80 lbs.A 60 lb. Bag provides 0.45 cubic feet that cured concrete.A 80 lb. Bag offers 0.6 cubic feet that cured concrete.If you have actually concrete yielded it is offered by the yard (which is a cubic garden = 27 cubic feet).

Following room the formulas to calculate just how much concrete you will need for a one slab:

3.14 x r (feet) x r (feet) x T (inches) ÷ 12 = cubic feet that concrete (CF)Number that bags the concrete needed:CF ÷ 0.45 = variety of 60 lb. BagsCF ÷ 0.6 = number of 80 lb. BagsNumber that cubic yards the concrete needed:CF ÷ 27 = cubic yardsr = radius the the circle in feet (1/2 that the diameter)T = Thickness in inchesCF = Cubic feet of concrete

### Example:

A one 6″ thick where the circle has actually a radius the 5.5' (11' diameter circle)

3.14 x 5.5 x 5.5 x 6 ÷ 12 = 47.5 cubic feet the concrete

47.5 ÷ 0.45 = 106 (105.6) 60 lb bags of concrete

47.5 ÷ 0.6 = 80 (79.2) 80 lb. Bags of concrete

47.5 ÷ 27 = 1.8 cubic yards that concrete

### Concrete Sonotube , column Or ring Footing: Notes:

Pre-mix concrete come in bags that are 60 lbs. And 80 lbs.A 60 lb. Bag offers 0.45 cubic feet of cured concrete.A 80 lb. Bag provides 0.6 cubic feet that cured concrete.If you have concrete delivered it is sold by the garden (which is a cubic yard = 27 cubic feet).

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Following space the formulas to calculate exactly how much concrete friend will need for a circle, tube or obelisk shaped pour:

3.14 x r (inches) x r (inches) x H (inches) ÷ 1728 = cubic feet the concrete (CF)Number the bags the concrete needed:CF ÷ 0.45 = number of 60 lb. BagsCF ÷ 0.6 = variety of 80 lb. BagsNumber of cubic yards of concrete needed:CF ÷ 27 = cubic yardsr = radius that the circle in inches (1/2 that the diameter)H = elevation in inchesCF = Cubic feet that concrete

### Example:

A tower 8' high wherein the column has actually a radius that 5″ (10″ diameter tube)

3.14 x 5 x 5 x 96 ÷ 1728 = 4.4 cubic feet that concrete

4.4 ÷ 0.45 = 10 (9.8) 60 lb bags of concrete

4.4 ÷ 0.6 = 8 (7.3) 80 lb. Bags the concrete

4.4 ÷ 27 = 0.16 cubic yards of concrete