No post within.Thanks. Are You Planning a Concrete, Stone, & Brick Project. Check out our deck planning resources to make sure you have everything you need. So, a 6’ high fence needs holes a minimum of 2’ deep. How Much Is a Bag of Concrete? This depends on the application and the climate where you live. The amount of overage you plan for will vary based on your quantity, but plan for at least 10% overage to accommodate spillage, settling, and grading inconsistencies. Hole Diameter: * mm. 1.069 cubic ft x 20 posts = 21.38 cubic ft. In most cases the lower hole portion only (usually about 1/2 to 2/3) will be filled with pre-mix concrete. Use this post hole volume calculator to accurately figure the amount of concrete required for any sized post hole with or without any common sized post. Length (mm) Please provide a valid value. Or, if you need a cubic yard or more, order mixed and delivered. bags. Use the fence calculator to estimate the number of posts, slats, and pickets needed for your fence project. Width (mm) Please provide a valid value. To complete this project you will need the following quantity of concrete: Click on the product images for more infomation. Finally, digging can be hard, time-consuming work. Concrete Footing: How Thick Should it Be? See the example video below for more information. For step-by-step instructions, please select a project guide below: Dig an extra 10cm and fill with drainage gravel. Length (mm) Please provide a valid value. Therefore, 2’ of post will be in the ground. Add the size of the post. Step 2: Size of holes. bags of concrete have a retail value of between $3.10 and $3.50, although you may be able to buy it cheaper in-bulk. Tutorials, Calculators, and Building Codes. Use our handy concrete calculator below to compute the volume you will need for a range of structures, including square slabs, footings, round slabs, columns, stairs and fence post holes. So, in this example, you would want to buy bags. Look at our collection of building photos for creative ideas! First, you need to calculate the volume for the post hole. What are the dimensions of the path, slab or post holes you are building? There’s No Education Like Real Life Business Experience, What Hansen Pole Buildings Offers for Prospective Barndominium Owners, Floor Trusses, Plywood Floor, and Post Frame Conversion, Seven Reasons Why Your Next Barndominium Should Be Pole Frame Construction. Pre-Mix Concrete Bag Calculator Calculated at 133.3 lb per ft³ - Allow extra for waste Cubic Feet - 100# Bags 80# Bags 75# Bags 60# Bags 50# Bags 40# Bags 25# Bags 20# Bags 10# Bags @ $ per bag It is also more expensive. What are the dimensions of the path, slab or post holes you are building? If there are multiple different size post holes that need to be filled, calculate each set with matching dimensions separately, then add the totals together. The design is done so the footing (concrete below the column) and the collar can be poured all at one time. Let’s get started! The calculator will then tell you the number of bags you need based on the different size of bags we carry. Simply input the appropriate figures of your intended construction, along with the suitable units, and then click ‘calculate’ to view the final volume figure. The following table shows the approximate yield of mixed concrete for common bag weights. Click the button to calculate the volume of concrete and man-hours (not including mixing) needed for this job. Let’s say we are installing a 6’ fence. Enter dimensions in US units (inches or feet) or metric units (centimeters or meters) of your concrete structure to get the cubic yards value of the amount of concrete you will need to make this structure.