Total volume of concrete needed = (10,800in³ - 1200in³) * 144 = 1,382,400in³Ĭoncrete is usually given in cubic yards, so after conversion, we see that we will need 29.63 cubic yards of concrete. Now all we need to do subtract the post volume from the hole volume and multiply the result by the total number of posts. Next, we calculate the volume of the cuboid hole: First we need to calculate the volume of the part of the post that's underground with the cuboid post volume equation:
⅓ should be buried in the ground, so the height of the buried part will be 60 inches. Remember to change the height of the post into inches for this calculation - 15 feet equals 180 inches. Let's say we are using cuboid posts that are 5 inches wide and 4 inches thick. Total number of pickets = 12,000in / (5in + 1in) = 12,000 / 6 = 2,000Īll we need to do now is to estimate how much concrete we will need to secure the posts to the ground. As 1,000 feet equals 12,000 inches, the total number of pickets will be:
Let's say our fence will be built out of 5-inch-wide pickets, with 1 inch of spacing. In this case, the total number of rails we need is: Let's say we want our fence to have 4 rails per section. Number of posts = (1,000ft / 7ft) + 1 = 142.85 + 1 = 143.85Īs we need to round the number up, the number of posts is 144. We will start by calculating the number of posts and how long they should be: Let's say we want to build a fence that's 1,000 feet long, with 7 feet in between each post and a height of 10 feet. To make the process of estimating fencing materials even clearer, let's go through an example together.
Read this short set of instructions to learn how to use it. Although our fence estimator may seem complicated at first, in reality it is quite a simple tool.