Fence for 100 ft
8 foot post spacing, 2 bags per post.
Posts
14
Sections
13
Post mix bags
28
posts = (100 รท 8, rounded up) + 1 = 14
About 30.5 m of fence.
Open the Fence CalculatorAbout this estimate
Divide the 100 foot run by your 8 foot spacing for 13 sections, then add one post to close the run. Gates and corners change the count, so adjust for your layout.
Setting posts? A post hole digger or auger saves hours over a shovel on a long run.
View on AmazonAs an Amazon Associate we earn from qualifying purchases.
Common questions
How many posts for a 100 foot fence?
At 8 foot spacing, 100 divided by 8 is 12.5, rounded up to 13 sections, so 14 posts including the closing post.
How many bags of concrete per post?
About two bags of fast setting post mix per post for a standard hole, so about 28 for this fence.
More Calculators
Concrete New
Enter slab dimensions. Result rounds up with a 7 percent waste allowance.
Gravel New
Enter the area dimensions and depth. Result rounds up with a 5 percent waste allowance.
Mulch New
Enter the bed area and depth. Result rounds up with a 5 percent allowance.
Topsoil New
Enter the area and depth. Result rounds up with a 5 percent allowance.
Paint New
Enter total wall area and coats. Result rounds up to whole units.
Flooring New
Enter room area and the coverage printed on the box. 10 percent waste added.
Tile New
Enter the area and one tile size. 10 percent waste added.
Drywall New
Enter total area to cover. 10 percent waste added.
Paver New
Enter the patio size and one paver size. 5 percent waste added.
Sand New
Enter the area and depth. 5 percent allowance added.
Roofing New
Enter the roof surface area. 10 percent waste added. Three bundles per square.
Insulation New
Enter area to cover and the coverage printed on the package. 5 percent added.
Fence New
Enter total fence length and post spacing.
Sod New
Enter the area to cover. 5 percent allowance added.
Grass Seed New
Enter area and seeding rate. Default rates suit a new lawn.
Fertilizer New
Enter area, target nitrogen rate and the first number on the bag.
Cubic Yards New
Enter length, width and depth. No waste added.
Square Footage New
Enter length and width.
Board Foot New
Enter board dimensions and quantity.
Material Cost New
Enter quantity, unit price, tax and delivery. Figures are in your own currency.