Fence Materials Calculator
Calculate exactly how many posts, panels, pickets, and concrete bags you need to build your privacy or picket fence.
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Fence Linear Measurement
Measure the total linear length of your property line. Our calculator determines how many pre-built panels, individual pickets, posts, and concrete bags you need.
How to Use the Fence Calculator
Whether you are installing pre-fabricated 8x6 panels or building a custom fence picket-by-picket, calculating your materials perfectly ensures you don't run out of concrete while mixing.
- Measure the property line: Enter the total linear length of the area you are fencing in.
- Count your gates: Add the number of pedestrian or driveway gates you plan to install. Each gate adds additional heavy-duty posts to your material list.
- Select your spacing: Standard wood fences use 8-foot post spacing. Vinyl fences often use 6-foot spacing.
Fence Calculation Formula
We calculate fence materials by finding the number of segments (panels) and then adding an extra post to cap off the final segment.
Step 1: Calculate Panels
Number of Panels = Total Length ÷ Post Spacing
Step 2: Calculate Posts
Number of Posts = Panels + 1 + (Number of Gates)
Step 3: Calculate Concrete
Concrete Bags = Total Posts × 1.5
Fence Example Calculation
You are fencing your backyard with 150 feet of fencing, using standard 8-foot spacing and 1 gate.
- Panels: 150 ÷ 8 = 18.75 (Round up to 19 panels).
- Base Posts: 19 panels + 1 end post = 20 posts.
- Gate Posts: 20 + 1 gate post = 21 total posts.
- Concrete Bags: 21 posts × 1.5 bags = 31.5 (Buy 32 bags).
Conclusion: You need 19 panels, 21 posts, and 32 bags of concrete.
Tips for Building a Fence
- Use fast-setting concrete: Buy the concrete bags labeled "Fast-Setting" (often with a red label). You do not need to pre-mix this in a wheelbarrow. Simply pour the dry powder directly into the hole around the post, and then pour a gallon of water on top. It sets in 20 minutes.
- Keep wood off the ground: Wood naturally rots when exposed to soil moisture. Always leave a 1 to 2-inch gap between the bottom of your pickets and the soil. Your posts should be rated for "Ground Contact" pressure treatment.
- Call before you dig: Always call 811 (in the US) a few days before you dig your post holes. Utility companies will come out for free and spray paint the ground to show you where dangerous gas and electric lines are buried.
Frequently Asked Questions
How deep should fence posts be buried?
As a general rule, a fence post should be buried exactly one-third to one-half of its above-ground height. For a standard 6-foot privacy fence, you should use 8-foot posts and bury them 2 feet deep.
How many bags of concrete per fence post?
For a standard 6-foot fence with an 8-inch diameter post hole dug 2 feet deep, you will need approximately one and a half to two 50-lb bags of fast-setting concrete per hole.
How many pickets are in an 8-foot fence panel?
If you are building your own fence using standard 5.5-inch wide dog-ear pickets with no gaps (a full privacy fence), you will need roughly 18 pickets to cover an 8-foot section.
Why do gates require extra posts?
A gate acts like a heavy lever that constantly pulls on the post it is hinged to. You must add an additional 'gate post' to frame the opening, and these posts should ideally be set deeper with more concrete to prevent sagging over time.