Fence Calculator
Estimate fence posts and pickets.
Input
Result
What is a Fence Calculator?
The Fence Calculator helps you instantly estimate your fence materials — posts, pickets, rails, and concrete. Just enter your numbers and the tool does the rest — no manual math, no guesswork.
How to calculate Fence manually (the formula)
The specific formula depends on what you are calculating. The calculator applies the correct equation automatically, but understanding the formula helps you verify the results and adapt them to your own needs.
Example calculation
Enter your values into the calculator and it will produce an instant result. For a step-by-step walkthrough, try different inputs and observe how each one affects the outcome.
Common mistakes
- Forgetting to account for post depth — A 6 ft fence needs posts buried about 2 ft deep, so each post must be 8 ft long, not 6 ft.
- Not subtracting the gate width — A 4 ft gate reduces the number of pickets and rails needed on that section.
- Using incorrect post spacing — Wider spacing saves posts but may violate local building codes or create a weak fence.
Frequently asked questions
How many fence posts do I need?
Divide the total fence length by the spacing between posts (typically 6–8 ft) and add one for the end post.
How far apart should fence posts be?
Standard fence post spacing is 6 to 8 feet apart. Closer spacing gives a sturdier fence.
How many pickets do I need?
Divide the total fence length by the picket width plus gap. For privacy fences, pickets are usually placed flush with no gap.
How much concrete per fence post?
A typical 4×4 post sunk 2–3 ft deep needs about one 50 lb bag of concrete mix per post.
How do I calculate the total fence material cost?
Multiply the number of posts, pickets, rails, and concrete bags by their unit prices and add them together.
Should I include a gate in my fence estimate?
Yes. A gate takes up fence length and requires extra hardware. Subtract the gate width from the total fence length.