Fence Estimate
Estimate fence materials including posts, rails, pickets, and concrete volume for any fencing project. Free online fence material estimator with quantity breakdowns.
Post Dimensions (for concrete estimate)
About This Calculator
Our Fence Estimate Calculator helps homeowners, contractors, and DIY enthusiasts quickly determine the materials needed for any fencing project. Whether you're building a privacy fence, garden fence, or property boundary, this tool calculates the exact number of posts, rails, pickets, and concrete volume required — saving you time and preventing costly material shortages or overages.
The calculator uses standard fence construction formulas: posts are calculated by dividing the total fence length by post spacing and rounding up, rails are determined by the number of sections multiplied by rails per section, and pickets are computed from the fence length divided by the effective width of each picket (picket width plus gap). Concrete volume is estimated based on post dimensions, with the hole size set to three times the post width and one-third of the post height buried underground.
Regional Notes
India (IN): Fence lengths are commonly measured in meters. Typical post spacing is 2.0–2.5 m. Concrete for post footings uses standard M20 mix. Common fence heights range from 1.5 m for garden boundaries to 2.0 m for privacy fences.
United States (US): Fence dimensions are often in feet (1 ft = 0.3048 m). Standard post spacing is 6–8 ft. Picket widths are typically 3.5 in or 5.5 in with 1–2.5 in gaps. Concrete is measured in 60 lb or 80 lb bags per post.
United Kingdom (UK): Fencing is measured in meters with post spacing of 1.8–2.4 m. Concrete for fence posts is typically sold in 25 kg bags of post mix concrete. Standard fence heights are 1.0 m (garden) to 1.8 m (privacy).
Frequently Asked Questions
How do I calculate the number of fence posts needed?
To calculate the number of fence posts needed, divide the total fence length by the post spacing and add one. For example, for a 30 m fence with 2.4 m post spacing: (30 ÷ 2.4) + 1 = 13.5, rounded up to 14 posts. Always round up to the nearest whole number for complete sections.
How deep should fence posts be buried?
A general rule is to bury at least one-third of the total post length underground. For a 1.8 m fence height, each post should be about 2.7 m long, with 0.9 m buried underground and secured with concrete. This ensures stability against wind and ground movement.
What is standard post spacing for a fence?
Standard post spacing for residential fences is typically between 6 to 8 feet (1.8 to 2.4 meters). In metric countries, 2.0 to 2.5 m spacing is common. Closer spacing provides more strength, while wider spacing reduces material costs.
How much concrete do I need per fence post?
The concrete volume per post depends on post dimensions and hole size. A typical hole is three times the post width. For a 10 cm × 10 cm post buried 0.9 m deep with a 30 cm × 30 cm hole, you need about 0.08 m³ of concrete per post. This calculator computes total concrete volume based on your post dimensions.
How do I calculate the number of pickets needed?
To calculate pickets, convert fence length to centimeters and divide by the sum of picket width and gap. For a 30 m fence with 10 cm wide pickets and 5 cm gap: 3000 cm ÷ 15 cm = 200 pickets. Always round up to ensure full coverage.
What is the standard picket width and gap?
Standard picket widths range from 8.9 cm (3.5 in) to 14 cm (5.5 in). The gap between pickets is typically 2.5 cm (1 in) to 6 cm (2.5 in). Closer gaps provide more privacy while wider gaps reduce wind resistance and material costs.
How many rails do I need per fence section?
Most fences use 2 or 3 rails per section. Two rails are standard for fences up to 1.5 m tall, while three rails are recommended for taller fences above 1.8 m. Each section between posts gets the number of rails you specify.
Can I use this fence estimate for any fence type?
This calculator works for standard wooden privacy fences, picket fences, and similar post-and-rail designs. For specialized fences like chain-link, vinyl, or board-on-board, use our dedicated calculators. The material quantity formulas apply to most post-based fence types.