Estimate fence posts, panels, rails, pickets, and total cost.
Complete Guide to Fence Planning
Building a fence is one of the most impactful home improvements, providing privacy, security, property definition, and curb appeal. Whether you’re enclosing a backyard, securing a pool area, or adding decorative fencing to your front yard, accurate material estimation is the first step to a successful project.
Our fencing calculator helps you determine exactly how many posts, rails, pickets, and bags of concrete you need based on your fence length, height, and style. It also provides cost estimates to help you budget effectively.
Fence Material Costs by Type
| Fence Type | Material Cost/ft | Installed Cost/ft | Lifespan | Maintenance |
|---|---|---|---|---|
| Pressure-Treated Pine | $8-$15 | $15-$30 | 15-20 years | Stain every 2-3 years |
| Cedar | $12-$25 | $20-$40 | 15-25 years | Seal every 2-3 years |
| Redwood | $20-$35 | $30-$55 | 20-30 years | Seal every 2-3 years |
| Vinyl/PVC | $15-$30 | $25-$45 | 20-30+ years | Occasional washing |
| Chain Link | $4-$10 | $10-$25 | 15-25 years | Minimal |
| Aluminum | $15-$40 | $25-$55 | 20-30+ years | Minimal |
| Wrought Iron | $20-$50 | $30-$80 | 30-50+ years | Paint every 3-5 years |
| Composite | $15-$45 | $25-$60 | 25-30+ years | Minimal |
Post Requirements by Fence Length
| Fence Length | Posts (8ft spacing) | Posts (6ft spacing) | Concrete Bags | Rails (3 per section) |
|---|---|---|---|---|
| 50 feet | 8 | 10 | 16-20 | 21-27 |
| 100 feet | 14 | 18 | 28-36 | 39-51 |
| 150 feet | 20 | 26 | 40-52 | 57-75 |
| 200 feet | 26 | 35 | 52-70 | 75-102 |
| 300 feet | 39 | 51 | 78-102 | 114-150 |
Frequently Asked Questions
How many fence posts do I need?
Divide your total fence length by the post spacing (typically 6-8 feet) and add 1 for the starting post. For example, a 100-foot fence with 8-foot spacing needs 14 posts (100 ÷ 8 = 12.5, rounded up to 13, plus 1 = 14). Add extra posts for corners and gates.
How deep should fence posts be set?
Posts should be set at least 1/3 of their above-ground height into the ground, with a minimum of 24 inches. For a 6-foot fence, posts should be buried 24-30 inches. In areas with frost, posts should extend below the frost line.
How far apart should fence posts be?
Standard spacing is 6 to 8 feet between posts. For wood privacy fences, 8 feet is most common as it matches standard lumber lengths. For chain link, 10 feet is typical. For vinyl, follow manufacturer recommendations, usually 6-8 feet.
How many pickets do I need for a fence?
Divide the total fence length (in inches) by the picket width plus gap width. For standard 3.5-inch pickets with 2-inch gaps: 100 feet × 12 = 1,200 inches ÷ 5.5 inches = 218 pickets. Add 10% for waste.
What is the cheapest fence to install?
Chain link fencing is the most affordable at $5-$15 per linear foot installed. Wire fencing is cheaper for rural areas at $1-$5 per foot. Among wood fences, pressure-treated pine is the most economical at $12-$25 per linear foot.
How much does a wood fence cost per foot?
Wood fence costs vary by type: pressure-treated pine ($12-$25/ft), cedar ($15-$35/ft), redwood ($25-$50/ft). A standard 6-foot privacy fence in cedar costs about $20-$30 per linear foot for materials, $30-$50 installed.
How long does a wood fence last?
Pressure-treated pine lasts 15-20 years with proper maintenance. Cedar naturally resists rot and lasts 15-25 years. Redwood can last 20-30 years. Staining or sealing every 2-3 years significantly extends the lifespan of any wood fence.
Do I need a permit to build a fence?
Most municipalities require a permit for fences over 6 feet tall. Even shorter fences may need permits depending on location, property lines, and HOA rules. Always check local building codes and obtain necessary permits before starting.
How much concrete do I need for fence posts?
Each post hole typically needs 1-2 bags of 50-pound concrete mix. A standard hole is 10 inches in diameter and 24-30 inches deep. For a 100-foot fence with 14 posts, plan for 14-28 bags of concrete.
What is the best wood for fencing?
Cedar is the most popular choice for its natural rot resistance, attractive appearance, and durability. Pressure-treated pine is more affordable with good longevity. Redwood is premium but expensive. All wood fences benefit from sealing or staining.
How do I calculate fence materials for a yard?
Measure the total perimeter you want to fence. Subtract widths for gates. Then calculate posts (perimeter ÷ spacing + 1), rails (2-3 per section × number of sections), and pickets or panels based on the fence style.
Should I use 4×4 or 6×6 fence posts?
4×4 posts are standard for fences up to 6 feet tall with panel sections up to 8 feet. Use 6×6 posts for gates (they bear more weight), fences over 6 feet tall, areas with high winds, and for greater durability and visual appeal.
How many rails do I need per fence section?
Most fences use 2 horizontal rails per section (top and bottom). Fences over 5 feet tall should use 3 rails (top, middle, bottom) for added strength and to prevent warping. Each 8-foot section needs 2 or 3 rails.
What is a shadow box fence?
A shadow box fence has pickets alternating on each side of the rails, creating a fence that looks the same from both sides. It provides privacy while allowing air flow. It uses about 50% more pickets than a standard privacy fence.
How do I build a fence on a slope?
Two methods: stepped (level panels with gaps underneath, best for moderate slopes) or racked (panels follow the ground contour, best for gentle slopes). Stepped is easier to build; racked looks more natural. Both require careful post placement.
Is vinyl fencing better than wood?
Vinyl fencing is maintenance-free, won’t rot or warp, and lasts 20-30+ years. However, it costs more upfront ($20-$40/ft installed), can crack in extreme cold, and offers fewer style options. Wood offers more customization and a natural look.
How do I maintain a wood fence?
Clean annually with a fence wash or pressure washer. Apply stain or sealant every 2-3 years. Repair loose or damaged boards promptly. Keep vegetation away from the fence. Check posts for rot at ground level and replace as needed.
What is the standard fence height?
For backyard privacy fences, 6 feet is the most common height and usually the maximum allowed without a permit. Front yard fences are typically 3-4 feet. Pool fences must be at least 4 feet per most codes.
How much does fence installation labor cost?
Professional fence installation typically costs $5-$15 per linear foot for labor alone. Total installed costs: wood privacy ($25-$50/ft), vinyl ($25-$45/ft), chain link ($10-$25/ft), wrought iron ($30-$80/ft). Gates are extra.
Should I use screws or nails for fencing?
Exterior-rated screws are recommended for fencing. They hold better than nails, are easier to replace damaged boards, and resist pulling out. Use hot-dipped galvanized or stainless steel screws. Nails are acceptable for structural framing.
What size gate do I need for a fence?
Standard pedestrian gates are 3-4 feet wide. For equipment access (lawn mowers), 4-5 feet. For vehicle access, double gates of 10-16 feet total width. Always make gates slightly narrower than the opening for hardware clearance.
How do I prevent fence posts from rotting?
Use pressure-treated wood rated for ground contact. Set posts in concrete with the top slightly above ground. Apply post preservative to cut ends. Consider metal post brackets that keep wood above the soil. Gravel at the base improves drainage.
Can I install a fence in winter?
Yes, but frozen ground makes digging harder. Use a power auger for post holes. Concrete sets slower in cold (protect from freezing for 24-48 hours). Winter installation may cost more for labor but material prices may be lower.
How do I find my property line for fencing?
Check your property survey or plat map (available from your county). Hire a surveyor for precise marking ($200-$800). Many areas require fences to be set 2-6 inches inside the property line. Discuss fence plans with neighbors to avoid disputes.
What is the difference between a panel and picket fence?
Panel fences come as pre-assembled sections (typically 6×8 ft) that attach between posts — faster to install. Picket fences have individual boards nailed to rails — more customizable and easier to follow terrain changes. Both can achieve the same final look.
How many boards are in a fence panel?
A standard 8-foot privacy fence panel uses about 15-17 boards that are 6 inches wide, or about 27 boards that are 3.5 inches wide. Shadow box panels use more boards (20-25 for 6-inch boards). The exact count depends on board width and gap.
What is a good neighbor fence?
A good neighbor (or friendly neighbor) fence looks the same from both sides. Styles include shadow box, board-on-board, and alternating panels. Some areas require the ‘finished’ side to face the neighbor.
How do I attach fence panels to posts?
Use galvanized panel brackets (L-brackets or U-brackets) screwed to the posts. Alternatively, toenail through the rails into the posts with 3-inch exterior screws. Brackets provide the strongest, most professional connection.
Do I need to stain a pressure-treated fence?
While pressure-treated wood resists rot, staining adds UV protection, reduces cracking, and improves appearance. Wait 2-4 weeks after installation for the wood to dry before applying stain. Use a semi-transparent exterior stain for best results.
How much wind can a wood fence withstand?
A standard 6-foot privacy fence can withstand winds of 40-60 mph. For high-wind areas, use deeper posts (36+ inches), closer spacing (6 ft), 3 rails per section, and consider adding gaps or using a semi-private style to reduce wind load.