Contents

- 1 How do I figure out how much concrete I need for footings?
- 2 How do you calculate footings?
- 3 What concrete do I need for footings?
- 4 How much quikrete do I need calculator?
- 5 How many bags of concrete do I need for a 10×20 slab?
- 6 How many bags of concrete do I need for a 4×4 post?
- 7 What is the standard footing size?
- 8 How thick do footings need to be?
- 9 How deep should my footings be?
- 10 How long do concrete footings take to dry?
- 11 Does a concrete slab need footings?
- 12 How many bags of cement do I need for 1 cubic meter?
- 13 Can you pour concrete directly on dirt?
- 14 How much area does a 80lb bag of quikrete cover?
- 15 How many 80lb bags of concrete makes a yard?

## How do I figure out how much concrete I need for footings?

CONCRETE CALCULATOR FORMULA

- Determine how thick you want the concrete.
- Measure the length and width that you’d like to cover.
- Multiply the length by the width to determine square footage.
- Convert the thickness from inches to feet.
- Multiply the thickness in feet by the square footage to determine cubic feet.

## How do you calculate footings?

How to Calculate Footing Size

- Determine the width and length of the cement slab in inches.
- Divide the width by 12 to convert it to feet.
- Divide the length by 12 to convert it to feet.
- Determine the depth or thickness that is required for the footing in inches.
- Multiply the width by the length and then by the depth.

## What concrete do I need for footings?

A concrete mix of 1 part cement: 2 parts sand: 4 parts coarse aggregate (by volume) should be used for footings. Concrete must be placed within half an hour of mixing. Brickwork – Place your concrete into your trench. Work the concrete into awkward places and corners using a shovel.

## How much quikrete do I need calculator?

Assume a 10-by-10-foot square area with concrete 4 inches thick. When you multiply 10 by 10 by. 333 feet, you get 33.333 cubic feet. Divide the total cubic feet needed by the total cubic feet that can be made from one bag of Quikrete Concrete Mix.

## 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 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.

## What is the standard footing size?

Under every house is a foundation, and under most foundations are footings. Most of the time we take footings for granted, and usually we can: For typical soils, a common 16- or 20-inch-wide footing can more than handle the relatively light weight of an ordinary house.

## How thick do footings need to be?

Depth of Footings Footings should extend to a minimum depth of 12 inches below previously undisturbed soil. Footings also must extend at least 12 inches below the frost line (the depth to which the ground freezes in winter) or must be frost-protected.

## How deep should my footings be?

Footings need to be minimum 1m deep by 600mm wide. We always trench fill with concrete. Final decision will be with building control, hope you dont have any large trees near.

## How long do concrete footings take to dry?

If you use a concrete that has a quick setting additive you need to wait a minimum of one sunny day, if you are using a standard concrete footing mix I would recommend waiting for a minimum of seven days and a maximum of 28 days, of course, that is if the conditions are right for the concrete to cure and set hard.

## Does a concrete slab need footings?

While not a requirement, a concrete slab foundation provides a solid, clean surface for your steel building and can help it last longer. Since the building will require anchoring to minimize shifting, pouring a concrete slab gives you a chance to pour footings as well.

## How many bags of cement do I need for 1 cubic meter?

Batching by volume – DIY

Materials | 0.2 m^{3} concrete |
1 m^{3} concrete |
---|---|---|

cement (no. 25 kg bags ) | 2.5 | 12 |

all-in aggregate (volume in m^{3}) |
0.25 | 1.3 |

water (volume in litres) | 32 | 160 |

cement (no. 25 kg bags ) | 3.5 | 14 |

## Can you pour concrete directly on dirt?

Long story short, yes you can pour concrete over dirt.

## How much area does a 80lb bag of quikrete cover?

4 sq feet in that amount of cement.

## 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.