How much concrete do I need for a post hole?

A: Finding the right amount of concrete depends on the size of the hole and the size of the post. The diameter of the hole should equal about three times the diameter of the post and the depth of the hole should be about ⅓ to ½ the total length of the pole.

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 4x4 post hole?

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 quikrete do I need for a post hole?

The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet). Add about 6 inches of QUIKRETE All-Purpose Gravel into the bottom of the hole.

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

1 cubic yard = 27 cubic feet

In order to have enough concrete for one cubic foot, you'll require 2.2 bags of 60-lb concrete. Since bags are only sold in whole (not half, or quarter) quantities, you'll need to purchase three (3) 60-lb. bags for one cubic foot.

How to Dig, Set and Concrete Fence Posts

How many square feet does a 50 lb bag of quikrete cover?

A 50 lb bag of concrete approximately cover around 1.5 square feet area upto standard depth of depth of 3 inch for your patio and sidewalk.

Is 2 feet deep enough for fence posts?

The minimum depth that you should dig your fence post holes for panel sections is 2 feet. A general formula is to dig the holes one-third to one-half of the post's aboveground height. The deeper you dig the holes, the more stability your fence has, but you must also purchase longer posts.

How do you calculate concrete holes?

To find cubic metres needed to fill a round hole

1. EXAMPLE: How much concrete is needed to fill 5 holes 1200mm deep and 1050mm round?
2. ANSWER: One hole takes 1.039 cubic metres, therefore 5 holes = 5 x 1.039 = 5.195. ( say 5.2 cubic metres)
3. NOTE: When the Diameter of a hole is doubled, it takes 4 times more concrete.

How deep should a 12 foot post be in the ground?

The general rule of thumb when setting a post is that the depth of the post's hole needs to be one-third to one-half of the actual above-ground height of the post. So, a six-foot-high finished post ideally needs to be buried three feet into the ground.

How much concrete do I mix per fence post?

Generally, for each fence post, you will need enough cement to fill a hole that is a third to half as deep as the post's above-ground height and three times as wide (in diameter) as the actual post. That leaves you with the job of measuring out the fence posts so that you know how large each post hole should be.

How many bags of concrete make a cubic metre?

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 many posts does a bag of Postcrete do?

depends how 'good' are your holes. you will need minimum 1 bag per post. I usually use one and a half per post but I am using 25kg bags. often poscrete is in 20kg bags so 2 per post is more likely.

How much concrete do I need calculator?

How to calculate concrete:

1. Determine how thick you want the concrete.
2. Measure the length and width that you'd like to cover.
3. Multiply the length by the width to determine square footage.
4. Convert the thickness from inches to feet.
5. Multiply the thickness in feet by the square footage to determine cubic feet.

How many 80 lbs bags of concrete make a cubic yard?

One 80lbs bag of Quikrete Concrete Mix will yield approximately . 60 cu ft. So it will take 45 bag to equal one cubic yard of concrete. If you have a project over a 1/2 a cubic yard you should consider our Mix On-site Concrete especially if you are hand mixing.

How do you figure concrete for a circle?

Two methods for calculating the area of a circle

1. You can do the pi*r² method, where pi = 3.141592..., r = the radius of the circle, and squared is squared.
2. Or, you can shortcut to a ratio: a circle within a square box occupies 78.5% of the space.

How deep should a 7 foot fence post be?

How Deep Should a Fence Post Be? For an average fence post, about 6 to 8 feet tall, prepare to dig a post hole about 2 feet deep. To install a fence post, you'll need a shovel or post digger, a 6-foot level, soil, and gravel or crushed stone.

How deep should a 6ft fence post be?

The width of the post hole should be 3 times the width of diameter of the post. For example, if you are erecting a 6 foot high fence using 4 inch fence posts, the posts need to be 6 feet above the ground. 6 divided by 3 is 2, therefore the depth of the hole required is 2 feet.

How deep should a 5ft fence post be?

Lawsons experts recommend you should dig a hole which has a depth of 2 ft (24 in / 600mm) to ensure you have a stable timber or concrete fence post.

How much does an 80lb bag of concrete cover?

80 lb bag of concrete yields 0.60 cubic feet which is approximately around 0.0222 cubic yards that will cover around 3.6 sq ft area up to standard depth of 2 inch excavation or backfills, and for 1 cubic feet of landfill you will need 1.66 bags of 80 lb concrete.

How much does a 90 lb bag of concrete cover?

A: Each 90-pound bag of QUIKRETE® Concrete Mix will yield approximately 0.675 cubic feet, so for 0.288 cubic yards, 12 90-pound bags will be required. Yields will vary with waste, uneven subgrade, etc. Helpful?

How many square feet does an 80lb bag of quikrete do?

4 sq feet in that amount of cement.