How many fence posts do I need for 100 feet?

For a 100-foot fence with standard 8-foot spacing, you need 13 sections, which requires 14 structural posts. Add 1 extra post if installing a gate.

How deep should fence posts be buried?

Bury 1/3 to 1/2 of the post length underground. For a 6-foot fence, use 9-foot posts with 3 feet buried for maximum stability and frost resistance.

How many concrete bags per fence post?

Typically 2 bags (60lb) per post for a 6-foot fence. Use 1.5 bags for 4-foot fences and 3 bags for 8-foot fences or high-wind areas.

Fence Post & Concrete Calculator

Accurately calculate your project materials and layout spacing instantly.

Total Fence Length (ft)

Post Spacing (ft)

Fence Height (ft)

Rails Per Section

Picket Width (in)

Picket Gap (in)

Total Gates

🛠️ Adjust Local Material Rates ($)

Cost per Post ($)

Cost per Picket ($)

Cost per Rail ($)

Cost per Bag ($)

📋 Estimated Material Requirements

Total Sections:-

Structural Posts:-

Concrete Bags (60lb):-

Support Rails:-

Facing Pickets:-

Approx. Cost (USD): -

📘 How to Use This Calculator

1 Enter your fence dimensions: Total length, post spacing, height, rails, picket size, gap, and gates.
2 Adjust local material prices: Update the cost per post, picket, rail, and concrete bag to match your local hardware store.
3 Click "Generate Shopping Blueprint": Instantly see exact sections, posts, concrete bags, rails, pickets, and total estimated cost.
4 Export or share your estimate: Download a clean 1-page PDF report or copy a shareable link to send to clients, contractors, or family.

💡 Pro Tips: Use the top toolbar to switch Dark Mode, toggle Feet/Meters, or change Language. Your last 5 calculations are saved automatically in Recent History below.

📏 Layout Advice: Always measure your actual property line before purchasing materials. Account for slopes, corners, and underground utilities. Standard post depth is 1/3 of total post length (e.g., 3ft underground for a 6ft fence).

⚠️ Disclaimer: All calculations are approximate estimates based on standard residential fencing practices. Actual material requirements may vary based on terrain, local building codes, wind load requirements, and supplier specifications. Always verify quantities with your local hardware distributor and consult municipal zoning regulations before breaking ground.

Fence Post & Concrete Calculator

📘 How to Use This Calculator

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