Complete Guide: How to Calculate Fence Materials
A fence material calculator converts your total fence length into the exact number of posts, rails, and pickets you need to build it. This free tool divides your fence into sections based on post spacing, then calculates rails per section and pickets based on their individual width.
💡 Quick Summary
Number of sections = fence length ÷ post spacing (rounded up). Posts = sections + 1 (since each section needs a post on both ends, shared with neighbors). Pickets = fence length ÷ picket width.
Choosing Post Spacing and Rails
- Post spacing: 8 ft is standard for most residential fences; shorter spacing (6 ft) adds strength for taller or windier locations.
- 2 rails: Suitable for shorter fences up to about 4 ft.
- 3 rails: Standard for typical 5-6 ft privacy or picket fences.
- 4 rails: Recommended for taller fences (7 ft+) for added rigidity.
Step-by-Step Instructions
- Enter your total fence length in feet.
- Enter your desired post spacing and fence height.
- Enter your picket width and select the number of rails per section.
- Click ⚡ Calculate Fence Materials.
- Review your posts, rails, pickets, and estimated post-hole concrete, then use 📋 Copy Summary to save your results.
Tip: This calculator estimates about 2 bags of 60 lb concrete per post hole as a general rule of thumb — actual amounts vary based on hole depth and diameter, which depend on your local frost line and fence height.