Contents

- 1 What is the formula for calculating concrete?
- 2 How many square feet will 3 yards of concrete cover?
- 3 How many bags of concrete do I need for a 10×20 slab?
- 4 How much does 4 yards of concrete cost?
- 5 How much does 2 yards of concrete cost?
- 6 How many bags of cement do I need for 100 square feet?
- 7 How many yards are in a 10×10 concrete pad?
- 8 How many 80lb bags of concrete make a yard?
- 9 How many bags of concrete makes a yard?
- 10 Do you need rebar for 4 inch slab?
- 11 How thick should a concrete slab be?
- 12 Can I pour a 2 inch concrete slab?
- 13 How much does it cost for a 12×12 concrete slab?
- 14 Is mixing your own concrete cheaper?

## What is the formula for calculating concrete?

**Calculating** the volume for **concrete** requires using three dimensions: length times width (which is area) times the height (thickness) or L x W x H. If you are using feet as your standard unit of measurement, this **formula** will give you the volume of **concrete** in cubic feet.

## How many square feet will 3 yards of concrete cover?

**One Cubic** Yard of Concrete: 4-inches thick – covers **81 square feet**. 5-inches thick – covers **65 square feet**. 6-inches thick – covers 54 square feet.

## How many bags of concrete do I need for a 10×20 slab?

A 60-pound **bag** yields. 017 cubic yards, and an 80-pound **bag** yields. 022 cubic yards. For a 10 x 10 **slab**, you **would need** 77 60-pound **bags** or 60 80-pound **bags**.

## How much does 4 yards of concrete cost?

Each cubic **yard of concrete costs** $119 to $147 per cubic **yard** delivered.

Short-Load **Concrete Prices**.

Cubic Yards |
Mixing On-site Fees |
---|---|

4 – 4.75 |
$80 |

3 – 3.75 | $90 |

2 – 2.75 | $100 |

1 – 1.75 | $110 |

## How much does 2 yards of concrete cost?

According to the NRMCA – Ready Mixed **Concrete** Industry Data Survey, the **average cost** of **concrete** in 2018 was $120 per cubic yard, or $240 for the **2** cubic **yards** needed for a typical 10-by-10-foot patio.

Bulk **Concrete Prices**.

Cubic Yards |
Price Range |
---|---|

1* | $140-$200 |

2* |
$280-$400 |

3* | $420-$600 |

4* | $560-$800 |

## How many bags of cement do I need for 100 square feet?

Ans.:- 7.6 no of **cement bags** (381.30 kgs) are required for **100 sq ft** rcc roof slab 4 inch thick m20 grade concrete. Ans.:- 7.6 **bags** (381.30 kgs), 9.5 **bags** (476.10 kgs) & 11.4 **bags** ( 570.8 kgs) **cement** are required for **100 sq ft** rcc roof slab 4 inch, 5inch & 6 inch thick respectively in m20 grade of concrete.

## How many yards are in a 10×10 concrete pad?

10 x 10 = 100 square feet. 4 ÷ 12 =.33. 100 x.33 = 33 cubic feet. 33 x.**037** = **1.22** cubic yards.

## How many 80lb bags of concrete make a yard?

**how many 80lb bags of concrete** are in a **yard**? You will need 45 **bags of concrete** mix to **make** a cubic **yard** of **concrete**. There’s 27 cubic feet of **concrete** in a cubic **yard**.

## How many bags of concrete makes a yard?

On average, it will take 90 40lb bags, **60** 60lb bags, or 45 80lb bags to fill one cubic yard of concrete.

## Do you need rebar for 4 inch slab?

No, **you do** not **need rebar** for a **4**–**inch slab** of concrete on grade. A **4**–**inch**-thick **slab** cast on the ground and in permanent contact with it will float and **rebar** is not required. **Rebar** is recommended on concrete measuring 5 – 6 **inches** thick.

## How thick should a concrete slab be?

Standard **concrete** floor **slab thickness** in residential construction is 4 inches. Five to six inches is recommended if the **concrete** will receive occasional heavy loads, such as motor homes or garbage trucks. To prepare the base, cut the ground level to the proper depth to allow for the **slab thickness**.

## Can I pour a 2 inch concrete slab?

If done properly, new **concrete can** often be **poured** right over an existing **slab**. For this to be feasible, the contractor needs to **pour** at least **2 inches** thick, use smaller aggregate, and incorporate reinforcement such as welded wire mesh or fiber mixed into the **concrete**.

## How much does it cost for a 12×12 concrete slab?

How much does a 12×12 concrete slab cost? The average cost to pour a 12×12 concrete slab that is 4” thick is between **$888** and $1,584, with professional labor and materials included.

## Is mixing your own concrete cheaper?

One of the least expensive ways to get **concrete** is to **mix your own**. You can buy bags of the **mix** from a home improvement store. Typically, you only have to add water for it to be ready to pour. Otherwise, you risk getting a weaker **concrete** once it cures, which could lead to cracks or crumbles within a couple of years.