Contents

- 1 How many bags of concrete does it take to fill a sonotube?
- 2 How many bags of concrete do I need calculator?
- 3 How do you calculate concrete for a round hole?
- 4 How many bags of concrete do I need for a 4×4 post?
- 5 How much concrete do I need for 10 sonotube?
- 6 How many bags of concrete do I need for a 10×20 slab?
- 7 How many 20kg bags of concrete are in a cubic meter?
- 8 How much does a 25kg bag of concrete cover?
- 9 How many bags of concrete do I need for a 6×6 post?
- 10 How many bags of concrete do I need for a post hole?
- 11 How much concrete do I need for a post hole?
- 12 How many 80lb bags of concrete makes a yard?
- 13 Do you leave sonotube in ground?
- 14 What size sonotube for a 4×4 post?

## How many bags of concrete does it take to fill a sonotube?

16 cubic feet / 0.6 cubic feet / **per bag** = 27 (80#) **bags of concrete** mix.

## How many bags of concrete do I need calculator?

To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. Use the following yields per each bag size: 40 pound bag yields.**011** cubic yards. 60 pound bag yields.017 cubic yards.

## How do you calculate concrete for a round hole?

The **formula** for the **volume** of a **round hole** is pi r2 x depth. Or 3.14 x radius x radius x depth. The radius is half the width of the **hole**.

## How many bags of concrete do I need for a 4×4 post?

Mix two 50lb bags of concrete with water in a mixing tub or 5-gallon bucket. Add concrete into the hole and around the 4” x 4”. Depending on your climate, let concrete set up for **24 – 48** hours.

## How much concrete do I need for 10 sonotube?

For example, a **sono tube** with a **10**” diameter and a 4′ depth requires 0.08 cubic yards of **concrete**.

## 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 many 20kg bags of concrete are in a cubic meter?

**one 20kg bag** will cover an area of 1.1m2 to a depth of approximately 10mm. or **108** x 20kg bags equates to one cubic metre of mixed concrete.

## How much does a 25kg bag of concrete cover?

As a rule of thumb 1 of our **25kg bags will cover** an area of 0.25m to a recommended depth of 50mm.

## How many bags of concrete do I need for a 6×6 post?

As I recall, a 60# **bag of concrete** is about. 5cf, so you’d need 3 **bags** per hole.

## How many bags of concrete do I need for a post hole?

Most fence **post holes** will need between 1 – 4 **bags of concrete** to securely hold the **post** in place. The best way to determine the size of the **hole** is: Diameter of the **hole** is 3 times the width of the fence **post**. Depth of the **hole** is one-third to half the above ground height of the fence **post**.

## How much concrete do I need for a post hole?

Remember, the depth of the **post hole should** be one-half of the above-ground **post** height. (Example: For a 6 feet above ground **post**, use a **post** with an overall height of 9 feet and place 3 feet in the ground). The **calculator** will indicate the number of 50 lb. bags of QUIKRETE® Fast-Setting **Concrete** you **need**.

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

If you’re using **80lb bags of concrete**, you’ll need 45 **bags** to **make a yard**.

## Do you leave sonotube in ground?

No, it’s not a problem to **leave** the **Sonotube** and its plastic “Square Foot” (like these) in the **ground** forever.

## What size sonotube for a 4×4 post?

What **size Sonotube** do I need for a **4×4**” **fence post**? The rule-of-thumb is to use a tube diameter 3 times the **post** width, therefore use a 12” diameter **Sonotube for a 4×4**” **post**.