How do you calculate concrete for a round hole?

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. Unless you are doing a monster hole it might be easiest to do this all in inches.

How much concrete do I need to fill a hole?

Regarding this, How much concrete do I need to fill a hole, if you are filling a round hole of 12 inch diameter and depth of 24 inch in the ground to set a concrete, generally you need around 1.57 cubic feet or 0.058 cubic yards of concrete.

How do you calculate concrete fill?

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 much does a 80lb bag of concrete cover?

30 cubic feet, 60 pounds of concrete mix yields . 45 cubic feet and an 80-pound bag yields . 60 cubic feet.

How many bags of concrete do I need for a 3 foot 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 yards of concrete are in a 50 pound bag?

Volume of a 50 lb bag of concrete:- a 50 lb bag of concrete yields 0.375 cubic feet volume which is approximately equal as 0.0138 cubic yards or 2.8 gallons or 10.62 liters volume of concrete.

How much does a 50 lb bag of concrete cost?

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How much concrete to put in a post hole?

The calculator will give you the results in cubic yards and the number of pre-mixed bags of concrete (40 lb, 60 lb, and 80 lb bags). To ensure that your posts are sturdy for a long time to come, remember to make your holes three times the diameter of your post and 1 ⁄ 3 as deep as your fence.

How to calculate the volume of concrete for a round hole?

Use these formulas to calculate volume or, for round holes, use our cylinder cubic yardage calculator . With the volume of the submerged post and the volume of the hole figured out, subtract the post volume from the hole volume, and you will have the volume of concrete needed for each hole.

How many bags of Quikrete for a 6 inch hole?

(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. For 2 inch post diameter / 6 inch hole diameter:

How many bags of concrete to fill one cubic yard?

The table below shows the coverage of different sizes of pre-mix bags. On average, it will take 90 40lb bags, 60 60lb bags, or 45 80lb bags to fill one cubic yard of concrete. Add 5%-10% additional material to account for settling, spillage, and waste.

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