Fence Calculator
Free fence calculator. Enter fence length, post spacing, height and picket size to get the number of posts, pickets, rails and bags of concrete for a wood privacy or picket fence.
About This Free Online Fence Calculator
Our free fence calculator works out every material you need to build a wood fence. Enter the fence length, post spacing (typically 8 ft), fence height, picket width and gap, and the tool returns the number of posts, pickets, rails (two or three per section), linear feet of railing and bags of concrete for setting the posts. Whether you are building a privacy fence, picket fence or ranch rail, this tool gives you an accurate shopping list. Everything runs in your browser — no signup, perfect for homeowners and fence contractors.
Features of Our Fence Calculator
- Post count from length and on-center spacing
- Picket count from height, width and gap
- Rails and linear feet of railing (two per section)
- Bags of concrete for setting each post
- Adjustable picket width and gap for any style
- 100% client-side and private — instant results, no signup
How to Use the Fence Calculator
Using this tool is simple and requires no signup or registration. Follow these steps:
- Enter the total fence length in feet and the post spacing (usually 8 ft).
- Set the fence height and picket width and gap.
- Confirm the post width for the concrete estimate.
- Read off posts, pickets, rails and concrete bags.
Frequently Asked Questions About Fence Calculator
How far apart should fence posts be?
Most wood fence posts are spaced 6 to 8 feet apart, with 8 feet being the most common for privacy fences because it suits standard 8 ft rails. Closer spacing (6 ft) makes a sturdier fence in windy areas. Enter your spacing and the calculator counts the posts.
How many pickets do I need?
Divide the fence length by the combined picket width plus gap (in feet) to get pickets per row, then multiply by the number of rails the pickets span. For a butt-joint privacy fence with no gap, divide by the picket width alone. The calculator handles the maths for you.
How many bags of concrete per fence post?
Most fence posts need about one to two 50 lb bags of concrete each, depending on hole size and post width. The calculator estimates bags from your post count for the whole run.
How many rails does a fence need?
Fences up to about 5 ft usually use two rails per section; fences 6 ft and taller use three. The calculator figures rails from your fence length and section count.
Is this fence calculator free?
Yes, completely free with no signup. All estimates run in your browser — nothing is uploaded.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.