Fence Calculator
Estimate fence posts, rails, pickets, and total cost
Total linear feet
Distance between posts
Height of the fence
Width of each picket
Gap between pickets
Posts Needed
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posts
Rails Needed
—
rails
Pickets Needed
—
pickets
Concrete for Posts
—
bags
Estimated Cost
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USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Our fence calculator helps you determine posts, rails, pickets, and concrete needed.
- Measure total fence line length
- Decide post spacing
- Choose fence height
- Enter specifications
- Add 5-10% extra
Expert Insights
Smart analysis for your Fencing project
Post Depth by Climate
Posts need 2ft minimum depth, or below frost line (36-48" in northern states). AI checks your region's frost depth for stable post settings.
Hardware Longevity Guide
Galvanized hardware lasts 15-20 years. Vinyl-coated: 20-25. Stainless steel: 25+. AI recommends based on coastal proximity and humidity.
Setback & Permit Check
Most municipalities require fences 2-8" inside property lines. AI reminds you to verify local codes and HOA rules before ordering materials.
Calculation Formula
Posts = (Length / Spacing) + 1
Rails = (Posts - 1) x 2
Pickets = Length / ((PicketWidth + Spacing) / 12)
Fence Material Comparison
| Material | Cost/Linear Ft | Lifespan | Maintenance | Post Spacing |
|---|---|---|---|---|
| Wood Privacy | $15-30 | 15-20 years | Annual staining | 6-8 ft |
| Chain Link | $8-18 | 20-30 years | Minimal | 8-10 ft |
| Vinyl | $20-40 | 25-40 years | Wash occasionally | 6-8 ft |
| Aluminum/Steel | $25-50 | 30-50+ years | Minimal | 6-8 ft |
| Composite | $25-45 | 25-40 years | Minimal | 6-8 ft |
Authority References
Our calculations are based on guidelines and standards from these authoritative sources:
- American Fence Association (AFA) — Fence Installation Standards. Learn more
- International Residential Code (IRC) — Chapter 3 — Building Planning (Setback Requirements). Learn more
Frequently Asked Questions
How far apart should fence posts be?
6-8 ft for wood fences, 10 ft for chain link. Use closer spacing for tall fences or high wind.
How much does a wood fence cost?
$15-$45 per linear foot installed. A 100-foot fence costs $1,500-$4,500. DIY saves 40-50%.