Fence Calculator estimates posts, rails, pickets, concrete bags and linear cost from fence length, height, spacing, gates and rate, using cost = length × rate plus material buffer formulas and totals.
What the Fence Calculator Estimates
This Fence Calculator takes your fence length, height, post spacing, gate count, and cost-per-linear-unit to produce a full material takeoff — posts, concrete bags, rail boards, pickets or infill, fasteners, and a hardware-store checklist with a 10% waste buffer. It works as a fence material calculator and fence cost calculator in one, covering Wood Privacy, Wood Picket, Vinyl Privacy, Vinyl Picket, and Chain Link types in both US Customary (ft) and Metric (m) modes.
Fence length × cost per linear unit. A material line-item estimate — not a contractor quote. Gate hardware, excavation, permits, and labour are not included.
Four result cards cover posts & footings, rail or channel material, pickets or panels or mesh, and a project summary with section count and DIY labour estimate.
The Hardware Store Checklist consolidates every item — with 10% buffer quantities — into a single printable or shareable list ready for your supplier.
Metric mode converts length and spacing internally. All formulas run in feet; results display with metric labels (m) when Metric mode is active.
| Result Card | What It Shows | Example (100 ft · 8 ft spacing · 6 ft · 1 gate) |
|---|---|---|
| Estimated Linear Cost | Fence length × $/linear unit | $1,500 |
| Posts & Footings | Post count, recommended size, concrete bags | 15 posts · 30 bags |
| Rails to Purchase | Board count, total rail run, fasteners | 39 × 8-ft 2×4 boards |
| Pickets to Purchase | Picket or panel count, size, fastener boxes | 219 pickets |
| Project Summary | Section count, DIY labour hours, +10% buffer totals | 13 sections · 10 hrs |
Fence Cost Formula
The fence cost calculator output is a linear-foot (or linear-metre) estimate based on the cost-per-unit you enter. It reflects fencing material cost only and should be treated as a budget starting point, not an installed contractor price.
Example: 100 ft × $15.00/ft = $1,500. The result card subtitle notes this excludes gate hardware and recommends adding 15–20% for a complete material budget.
The cost field accepts any value, so you can enter a local supplier quote to compare fence types or lengths. Cost-per-linear-metre mode works identically once you switch the Measurement System selector to Metric.
How Post and Section Counts Are Calculated
The fence post calculator uses three chained formulas. The section count drives the post count, and the post count drives concrete bag quantity. Every gate you enter adds one extra post to support the gate frame without reducing the fence run length.
Ceiling division means a partial bay is always treated as a full section. At 100 ft ÷ 8 ft = 12.5 → 13 sections.
The "+1" is the closing terminal post at the end of the run. With 13 sections and 1 gate: 13 + 1 + 1 = 15 posts.
Two 50-lb (US) or 20-kg (Metric) bags of quick-set concrete per hole. At 15 posts: 30 bags (1,500 lbs).
Wood Privacy Picket Formula
The wood fence calculator counts pickets based on the actual coverage width of a nominal 1×6 board — 5.5 inches — with zero gap between boards for a solid privacy screen. Fence length in feet is converted to inches before dividing by that coverage width.
At 100 ft: (100 × 12) ÷ 5.5 = 218.18 → 219 pickets. The ceiling function means a partial picket space is always counted as a full board.
For Vinyl and Chain Link types, infill is not counted per-board. Vinyl panels interlock into post slots and are counted by section. Chain Link fabric quantity equals the fence length, sold in standard roll sizes (50 ft / 15 m typical).
Rails, Fasteners, Concrete, and Gate Assumptions
Rail count per section depends on fence type and height. The privacy fence calculator and picket fence calculator use different rail layouts, and chain link and vinyl fence calculators use different infill hardware entirely.
Rails per section: Wood Privacy 6 ft → 3; Wood Privacy 8 ft → 4; Wood Picket ≤4 ft → 2, >4 ft → 3; Vinyl → 2 U-channels; Chain Link → 1 top rail.
At 39 boards: ⌈39 × 1.10⌉ = ⌈42.9⌉ = 43 boards. At 219 pickets: ⌈219 × 1.10⌉ = 241 pickets.
| Fence Type | Rails / Section | Infill Method | Key Fastener |
|---|---|---|---|
| Wood Privacy (6 ft) | 3 rails | 1×6 dog-ear pickets, 5.5 in coverage | 3" deck screws (6/picket) |
| Wood Privacy (8 ft) | 4 rails | 1×6 dog-ear pickets, 5.5 in coverage | 3" deck screws (6/picket) |
| Wood Picket | 2–3 rails | 1×3.5 Gothic picket, 2 in gap | 3" deck screws (4/picket) |
| Vinyl Privacy / Picket | 2 U-channels | Pre-fab panels by section | Post brackets (no picket screws) |
| Chain Link | 1 top rail | Mesh roll = fence length | Tension ties (1 per 24 in) |
How to Read the Hardware Store Checklist
The Hardware Store Checklist at the bottom of the results consolidates every calculated item into one printable list. Quantities for rails and pickets already include the 10% waste buffer — these are the numbers to order, not the base counts shown in the result cards above.
Use Copy Results to grab key quantities to your clipboard, Print / Save PDF for a store hard copy, or Share Tool to send the calculator link directly.
The Project Summary card shows estimated DIY hours at 10 linear feet per hour. At 100 ft that is 10 hours, shown as approximately 2 days of work.
Calculation Limits
These items fall outside the scope of the formulas and should be verified separately before purchasing materials or beginning installation.
References and Calculation Notes
The formulas use standard unit relationships and common trade practices for residential fence construction. The following sources inform the measurement conventions, code context, and material specifications applied in each calculation.
nist.gov/pml/special-publication-811
iccsafe.org — International Residential Code