Fence Calculator

Calculate posts, panels, pickets, and materials needed for wood, vinyl, chain-link, and composite fencing projects.

Fence Calculator

Enter your fence dimensions and specifications to calculate materials needed for your project.

Fence Dimensions

Fence Type

Typical heights: Privacy fence 6-8 ft, Picket fence 3-4 ft, Chain link 4-6 ft

Post Configuration

Typical spacing: 6-8 feet for wood, 8-10 feet for vinyl
Minimum 24" for 6' fence, 30" for 8' fence, or 1/3 of above-ground height

Panel/Picket Configuration

Typical picket spacing: 2.5" for privacy, 3.5" for semi-private

Rail Configuration

Gates

Standard gate width: 3-4 feet for pedestrian, 10-16 feet for driveway

Hardware & Fasteners

Typically 1-3 bags per post depending on post size and soil conditions
Extra material for cuts, defects, and mistakes (5-15% typical)

How to Use the Fence Calculator

  1. Measure Your Fence Line

    Measure the total linear feet of fence needed. Include all sides of the area to be enclosed.

  2. Select Fence Type

    Choose your fence material and style. Different types have different material requirements and installation methods.

  3. Determine Fence Height

    Select the fence height based on your needs (privacy, security, decoration).

  4. Configure Posts

    Set post spacing, size, and depth based on fence type, height, and local building codes.

  5. Configure Panels/Pickets

    Select panel type or picket dimensions and spacing based on your fence style.

  6. Add Gates

    Specify number and width of gates needed for access.

  7. Choose Hardware

    Select appropriate fasteners and concrete quantities for post installation.

  8. Add Waste Factor

    Include 5-15% extra material for cuts, defects, and mistakes during construction.

  9. Calculate

    Click "Calculate Fence Materials" to get your material list with quantities and estimated costs.

Practical Example: Calculating a 100' Wood Privacy Fence

Let's calculate materials for a typical 100-foot wood privacy fence that's 6 feet tall:

Inputs:

  • Length: 100 linear feet
  • Type: Wood Privacy Fence
  • Height: 6 feet
  • Post Spacing: 8 feet
  • Post Size: 4×4 pressure-treated
  • Picket Width: 5.5 inches
  • Picket Spacing: 2.5 inches
  • Rails: 3 rails (2×4)
  • Gates: 1 gate (4 feet wide)
  • Waste Factor: 10%

Calculations:

  1. Posts needed: ~13 posts (including corners and gate posts)
  2. Panels/sections: ~12 sections (8-foot spans)
  3. Pickets needed: ~240 pickets (accounting for spacing)
  4. Rails needed: ~36 rails (3 per section)
  5. Concrete: ~26 bags (2 per post)
  6. Fasteners: ~1,200 screws/nails

Result:

You would need approximately 13 posts, 240 pickets, 36 rails, 26 bags of concrete, and 1,200 fasteners for a 100-foot wood privacy fence.

Pro Tip: Always check local zoning regulations and property lines before installing a fence. Many areas require permits for fences over a certain height, and some neighborhoods have restrictions on fence materials and styles.

Fence Calculator FAQ

How far apart should fence posts be spaced? +

Standard fence post spacing depends on fence type and material:

  • Wood fences: 6-8 feet apart
  • Vinyl fences: 6-8 feet apart
  • Chain link: 8-10 feet apart
  • Wrought iron: 6-8 feet apart
Closer spacing (6 feet) provides more stability, especially in windy areas or for taller fences. Always check local building codes for specific requirements.

How deep should fence posts be set? +

Fence post depth should be:

  • At least 1/3 of the above-ground height (e.g., 24" deep for a 6' fence)
  • Below the frost line in your area (typically 12-48" depending on climate)
  • Minimum 24" for 4-6 foot fences
  • Minimum 30" for 6-8 foot fences
  • Corner and gate posts should be set deeper (add 6-12") for extra stability
In areas with heavy frost, posts should extend below the frost line to prevent heaving.

Should I use concrete for fence posts? +

Concrete is recommended for most fence posts because:

  • Provides superior stability and longevity
  • Prevents rotting by keeping posts above soil moisture
  • Resists frost heaving better than soil alone
  • Supports heavy gates and corner posts effectively
Alternative methods include compacted gravel (for drainage) or foam expanding foam, but concrete remains the most reliable option for permanent fences.

How many pickets do I need for a privacy fence? +

Picket count depends on:

  • Fence length: Total linear feet
  • Picket width: Typically 3.5" to 5.5"
  • Spacing between pickets: 2.5" for full privacy, 3.5" for semi-private
Formula: Pickets = (Fence length in inches) ÷ (Picket width + Spacing) Example: For 100 feet (1200 inches) with 5.5" pickets and 2.5" spacing: 1200 ÷ (5.5 + 2.5) = 150 pickets. Add 10-15% for waste and mistakes.