Free Fencing Calculator

Calculate posts, rails, pickets, and total project costs for any fence type. Perfect for contractors and DIY homeowners.

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Standard: 6-8 feet between posts

How to Use This Fencing Calculator

Our fencing calculator helps you accurately estimate materials and costs for your fence project. Whether you're enclosing a backyard, defining property lines, or adding security, this tool provides professional-grade estimates.

Step 1: Measure Your Fence Line

Walk your property and measure the total linear footage where you want the fence. Include:

  • All straight sections
  • Areas where gates will be installed (measure separately)
  • Count corners where the fence changes direction

Pro Tip: Use a measuring wheel for long distances. They're available at most hardware stores for under $30 and make measuring much faster and more accurate.

Step 2: Choose Your Fence Type

Each fence type has different costs, maintenance requirements, and lifespans:

Wood Privacy Fence ($15-30/linear foot installed)

The most popular choice for residential backyards. Provides complete privacy and a classic look. Typically 6 feet tall with no gaps between boards. Requires staining or sealing every 2-3 years. Lifespan: 15-20 years with proper maintenance.

Wood Picket Fence ($10-20/linear foot installed)

Classic American style with spaced vertical boards. Defines boundaries while maintaining visibility. Common heights are 3-4 feet. Popular for front yards and gardens. Same maintenance as privacy fencing.

Chain Link Fence ($8-15/linear foot installed)

Most economical option. Excellent for security and pet containment. Very low maintenance with a 20+ year lifespan. Available with privacy slats or fabric. Galvanized steel resists rust; vinyl-coated options available in colors.

Vinyl Fence ($20-35/linear foot installed)

Zero maintenance alternative to wood. Never needs painting or staining. Resists rot, insects, and weathering. Higher upfront cost but lowest lifetime cost. Available in white, tan, and wood-grain patterns. Lifespan: 25-30 years.

Aluminum Fence ($25-40/linear foot installed)

Elegant wrought-iron appearance without the rust. Popular for pools (meets code requirements), front yards, and decorative applications. Low maintenance and long-lasting. Not suitable for privacy.

Wrought Iron Fence ($35-60/linear foot installed)

Premium security and aesthetics. Extremely durable with proper maintenance. Requires periodic rust treatment and repainting. Often used for perimeter security and historic properties. Lifespan: 50+ years.

Understanding Post Spacing

Post spacing is critical for fence strength and longevity:

  • 6 feet - Maximum strength, required for 8-foot tall fences
  • 8 feet - Standard spacing for most 6-foot privacy fences
  • 10 feet - Acceptable for chain link and shorter fences

Wider spacing saves on posts but can cause sagging, especially with heavy materials or in windy areas. When in doubt, go with closer spacing.

Gate Considerations

Gates are the most used—and most abused—part of any fence. Plan carefully:

  • Walk gates: 3-4 feet wide, sufficient for people and equipment
  • Drive gates: 10-16 feet wide for vehicles, often double-swing
  • Gate posts: Must be larger/stronger than line posts (4x4 vs 4x6)
  • Hardware: Budget $30-100 for quality hinges, latches, and locks

Setting Posts: The Foundation of Your Fence

Properly set posts are essential. Here's what you need to know:

Depth: Posts should be buried 1/3 of their total length. For a 6-foot fence with posts 8 feet long, bury 2+ feet.

Concrete: Each post typically needs 1-2 bags of 80-lb concrete. Set posts in concrete for maximum stability, especially for gates and corner posts.

Gravel: Add 4" of gravel at the bottom of each hole for drainage. This prevents water from pooling and rotting the post base.

DIY vs. Professional Installation

Factor DIY Professional
Labor Cost $0 (your time) $5-15/linear foot
Time (100ft fence) 2-4 days 1 day
Tools Needed $200-500 in rentals Included
Quality Varies with skill Guaranteed
Permits Your responsibility Often handled

Before You Start: Important Considerations

  • Call 811 - Free utility locating service. Required before digging.
  • Check local codes - Height limits, setback requirements, permit needs
  • Survey your property - Know your exact property lines
  • Talk to neighbors - Sharing costs on boundary fences is common
  • Check HOA rules - Many have specific fence requirements

Do I need a permit for a fence?

Most municipalities require permits for fences over 6 feet tall or in front yards. Some require permits for any fence. Always check local building codes—fines for unpermitted fences can be significant.

Frequently Asked Questions

How much does a 100-foot privacy fence cost?

A 100-foot wood privacy fence typically costs $2,500-4,500 installed, depending on your location, height, and material quality. DIY installation can save 40-50% but requires significant time and tools.

How many posts do I need for 100 feet of fence?

With standard 8-foot spacing, you'll need about 14 posts for 100 linear feet (100÷8+1=13.5, rounded up). Add extra posts for corners and gates—typically 2 posts per gate.

How deep should fence posts be?

Fence posts should be buried 1/3 of their length, or at minimum below the frost line (varies by region, typically 18-48 inches). A 6-foot fence typically uses 8-foot posts with 2 feet buried.

Do I need a permit for a fence?

Most municipalities require permits for fences over 6 feet tall or in front yards. Some require permits for any fence. Always check local building codes—fines for unpermitted fences can be significant.

What is the best fence material for durability?

Vinyl and aluminum fences offer the best durability with minimal maintenance (25-30+ year lifespan). Chain link is also very durable (20+ years). Wood fences require regular maintenance but last 15-20 years with proper care.