Contents

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

## How much concrete is needed for a sonotube?

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

## 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 much concrete do I need calculator?

For concrete, the formula for volume is as follows: length x width x thickness. 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.

## 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 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**.

## 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 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 many cubic meters is a 25kg bag of concrete?

**Concrete** is a mix, typically of 1 part **cement** to 4-5 aggregate, and a **cubic metre** of finished **concrete** weighs around 2.5 tonnes, so requires around 500kg **cement** or 20× **25kg bags**. In direct answer, there is about 1/100th or 0.01 **m3** in a **25kg bag**.

## How much is a Metre of concrete?

Ready-mixed concrete is sold by the volume, so it’s essential to know the area you’re filling. The price of concrete depends on many factors, including where you’re located and the type you’ve ordered. However, in general, you should be looking at a cost of between **£65** and **£85** per cubic metre.

## How much does a yard of concrete cover?

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

## 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**.

## How much does 20kg of concrete make?

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**.