**How many bags of concrete do I need for a 10×10 slab?** Let me clear first, here we are discussing **ready mix** concrete **bags.** Traditionally,** concrete** is made by **mixing cement, **sand, and **aggregate** together to** make the homogeneous** dry mix. Then **water is added** to the mix to **make concrete** for different work.

**But now** people don’t **want to order **each material **separately **and then **mix them** and use **them for work.** The concrete is **now available** in dry **mix products **which are **filled in bags **like cement bags. So, the **buyer only** needs to add **sufficient water** to make wet **concrete.**

**There are **various** brands** that supply this **dry mix concrete** product such as **Quikrete, Sakrete,** and other brands in** the USA.**

How Many Bags of C**oncrete Do I Need?** depends on the** size of the slab** whether it is a **10×10 slab** o**r 10×12** etc and the** size of** the concrete** dry mix bag **you have **ordered** from the **company.**

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**Different Brands of Dry Mix Concrete Bags**

** 1. QUIKRETE**

**QUIKRETE Rip Rap** is a properly **proportioned** mixture of** portland cement**, graded sand, and other** approved ingredients** that can be** packaged** in various bags. **Examples** of the type**s of bags** include biodegradable paper, **fiberglass **s**crim-reinforced paper, **or burlap bags for **erosion control applications.**

**Quikrete Rip Rap is available in the following weight**

- 60 lb (27.2 kg) Paper Bag (No. 1129-60)
- 60 lb (27.2 kg) Burlap Bag (No. 1129-61)
- 60 lb (27.2 kg) Poly Bag (No. 1129-62)
- 60 lb (27.2 kg) Scrim Bag (No. 1134-60)
- 80 lb (36.2 kg) Paper Bag (No. 1129-80)
- 80 lb (36.2 kg) Scrim Bag (No. 1134-80)

### 2. Sakrete

The **Sakrete** **original bagged concrete mix,** trusted by pros** since 1936.** This professional-grade **mix delivers** consistent performance, **high strength**, and a smooth fi**nish that** makes it ideal for** every concrete** project from **slabs to footings** and everything in **between.**

Bag Size | Yield |

40 lb. (18.1 kg) | 0.30 cu. ft. (.008 cu. m) |

45 lb. (20.4 kg) | 0.34 cu. ft. (.01 cu. m) |

60 lb. (27.2 kg) | 0.45 cu. ft. (.012 cu. m) |

80 lb. (36.2 kg) | 0.60 cu ft. (.016 cu. m) |

90 lb. (40.8 kg) | 0.68 cu. ft. (.02 cu. m) |

**How Many Bags of Concrete Do I Need for a 10×10 Slab?**

You can find out **how many bags of concrete do I need for a 10×10 Slab** by following the below steps,

**Step: 1 Calculate Volume of Concrete Required Pouring 10×10 Slabs**

The **volume of concrete** can be calculated by **multiplying its length, width, and thickness **together.

**For example,**

**We have a 10×10 concrete slab with a thickness of 4”**

Length (L) = 10 ft Width (B) = 10 ft and Thickness = 4”

**Volume of Concrete = L x B X T**

Volume of Concrete = 10 x 10 x (0.33) **(Because 12” = 1 ft, 4/12 = 0.33)**

**Volume of Concrete = 33.3 cu. ft.**

It Is equal to** 0.95 cu. m** and **1.23 cu. yard**

**Explanation:**

3 ft = 1 yard, 3 ft x 3 ft x 3 ft = 1 yard x 1 yard x 1 yard

**27 cu ft = 1 cu. yard.**

S**o,** By dividing **33.3 cu. ft with 27** we will get the **volume of concrete in cu. yard.**

Volume of Concrete = 33.3 / 27 = **1.23 cu. yard**

### Step: 2 Add 10% Extra Volume

Add 10% **Extra Volume** to original volume for **dry volume** and **wastage** during pouring concrete

= 1.23 cu. yard x 10 %

= 1.23 x (10/100)

**= 0.122**

Total Volume of Concrete = 1.23 + 0.122 (10% Extra)

**= 1.35 cu yard**

### Step: 3 To Find Out How Many Bags of Concrete Do I Need

To find **how many bags of concrete do I need** to pour the **concrete slab** divide the **volume of concrete** by** yield of concrete bag **used for **making concrete.**

There are **different sizes** and **weights of concrete bags** available on the** market** such as 40lb,** 45lb**, 60lb, **80lb,** and **90lb.**

**The following table shows the size of concrete bags and their specific yield value.**

Bag Size | Yield |

40 lb. (18.1 kg) | 0.30 cu. ft. (0.008 cu. m) |

45 lb. (20.4 kg) | 0.34 cu. ft. (0.01 cu. m) |

60 lb. (27.2 kg) | 0.45 cu. ft. (0.012 cu. m) |

80 lb. (36.2 kg) | 0.60 cu ft. (0.016 cu. m) |

90 lb. (40.8 kg) | 0.68 cu. ft. (0.02 cu. m) |

**From the above table**, if we use a **40lb bag of concrete **for the **pouring slab,** its **yield value is 0.011 cu. yard**

**Its means,** 40 lb bag of concrete can pour** 0.011 cu. yard of concrete.**

So, for **1.35 cu yard** of concrete **how many bags of concrete do I need?**

**It is calculated **by dividing the **total volume of concrete** by the **yield value of bags of concrete.**

1.35/0.011

**= 122 Bags of concrete I need**

So, For a** 10×10 Slab with 4” thickness,** we need around **122 bags of concrete**.

**How Many Bags of Concrete Do I Need For 10×10 Slab with 4” thickness**

V**olume of Concrete** = 10 x 10 x (4/12) =** 33.3 cu. ft**

**Divide 33.3 with 27 **to get volume in cu yard. **(27 cu ft = 1 cu yard)**

33.3/27 =** 1.23 cu yard**

**Add 10 % extra **= 1.23 + (1.23 x 10 %)

Volume of Concrete = **1.35 cu yard**

No of B**ags of concrete** = 1.35/0.011 **= 122 bags**

Size | Yield (cu. ft) | Yield (cu. m) | Yield (cu. yard | Nos of Bags |

40lb | 0.30 | 0.008 | 0.011 | 122 |

45lb | 0.34 | 0.009 | 0.012 | 112 |

60lb | 0.45 | 0.012 | 0.016 | 84 |

80lb | 0.60 | 0.016 | 0.022 | 61 |

90lb | 0.68 | 0.019 | 0.025 | 54 |

**How Many Bags of Concrete Do I Need For 10×10 Slab with 5” thickness**

**How Many Bags of Concrete Do I Need For 10×10 Slab with 5” thickness**

**Volume of Concrete** = 10 x 10 x (5/12) = **41.6 cu. ft**

**Divide 41.6 with 27** to get volume in cu yard.** (27 cu ft = 1 cu yard)**

33.3/27 = **1.54 cu yard**

**Add 10 % extra **= 1.54 + (1.54 x 10 %)

Volume of Concrete = **1.69 cu yard**

**No of Bags of concrete** = 1.69/0.011 =** 154 bags**

Size | Yield (cu. ft) | Yield (cu. m) | Yield (cu. yard) | Nos of Bags |

40lb | 0.30 | 0.008 | 0.011 | 154 |

45lb | 0.34 | 0.009 | 0.012 | 141 |

60lb | 0.45 | 0.012 | 0.016 | 106 |

80lb | 0.60 | 0.016 | 0.022 | 77 |

90lb | 0.68 | 0.019 | 0.025 | 68 |

**How Many Bags of Concrete Do I Need For 10×10 Slab with 6” thickness**

**How Many Bags of Concrete Do I Need For 10×10 Slab with 6” thickness**

**Volume of Concrete** = 10 x 10 x (6/12) = **41.6 cu. ft**

**Divide 50 with 27 **to get volume in cu yard.** (27 cu ft = 1 cu yard)**

50/27 =** 1.85 cu yard**

**Add 10 % extra** = 1.85 + (1.85 x 10 %)

**Volume of Concrete** =** 2.035 cu yard**

**No of Bags of concrete** = 2.035/0.011 =** 185 bags**

Size | Yield (cu. ft) | Yield (cu. m) | Yield (cu. yard | Nos of Bags |

40lb | 0.30 | 0.008 | 0.011 | 185 |

45lb | 0.34 | 0.009 | 0.012 | 170 |

60lb | 0.45 | 0.012 | 0.016 | 127 |

80lb | 0.60 | 0.016 | 0.022 | 93 |

90lb | 0.68 | 0.019 | 0.025 | 81 |

**How Many Bags of Concrete Do I Need For 10×10 Slab with 8” thickness**

**How Many Bags of Concrete Do I Need For 10×10 Slab with 8” thickness**

**Volume of Concrete** = 10 x 10 x (8/12) = **41.6 cu. ft**

**Divide 66.7 with 27 **to get volume in cu yard. **(27 cu ft = 1 cu yard)**

**66.7/27 = 2.47 cu yard**

**Add 10 % extra** = 2.47 + (2.47 x 10 %)

**Volume of Concrete = 2.717 cu yard**

**No of Bags of concrete** = 2.717/0.011 = **247 bags**

Size | Yield (cu. ft) | Yield (cu. m) | Yield (cu. yard | Nos of Bags |

40lb | 0.30 | 0.008 | 0.011 | 247 |

45lb | 0.34 | 0.009 | 0.012 | 226 |

60lb | 0.45 | 0.012 | 0.016 | 170 |

80lb | 0.60 | 0.016 | 0.022 | 124 |

90lb | 0.68 | 0.019 | 0.025 | 109 |

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