Fence Calculator

Post count starts from spacing: Posts = ⌈Fence Length ÷ Post Spacing⌉ + 1, because a run of N spans between posts always needs N+1 posts — a 150-foot fence at 8-foot spacing needs 19 spans rounded up, meaning 19 posts plus one more to close the run, then additional posts added for each gate opening since gates need their own posts on both sides beyond the standard line.

Panel count for panel-style fencing equals the number of spans, Panels = ⌈Fence Length ÷ Post Spacing⌉, since one prefabricated panel typically fills exactly one post-to-post span. Picket count instead comes from linear coverage: Pickets = ⌈(Fence Length in inches) ÷ (Picket Width + Gap)⌉, because pickets are individual boards spaced with a small gap between them rather than pre-assembled sections.

Rail count depends on height and style: taller fences (over roughly 5 feet) typically need three horizontal rails per span for rigidity — top, middle, and bottom — while shorter fences often get by with two. Chain link uses a top rail run continuously along line posts rather than discrete rails per panel, so its rail count is tied to post count instead of span count.

Concrete is calculated per post: Concrete Bags = Posts × Bags per Post, where bags per post depends on post size and hole depth — a typical 4x4 or round post set 24-30 inches deep in a 10-12 inch diameter hole takes about 1.5 to 2 bags of 50-pound quick-setting concrete, while larger 6x6 gate posts or deeper frost-line holes in cold climates can take 3 or more bags each.

Total cost sums posts, panels or pickets, and concrete: Total Cost = (Posts × Post Price) + (Units × Unit Price) + (Concrete Bags × Bag Price), and dividing that by total fence length gives cost per linear foot, the number most useful for comparing a chain link quote against a wood picket quote on an apples-to-apples basis.

Take a 150-foot backyard fence run, 6 feet tall, built from pre-assembled wood panels on 8-foot post spacing, with one gate. Post count: 150 ÷ 8 = 18.75, rounds up to 19 spans, plus 1 for the closing post, plus 1 extra for the gate's second post, giving 21 posts total.

Panel count is 19, matching the number of spans (the gate opening replaces one panel position but the calculator still counts the panel-equivalent spans across the full run for pricing consistency; in practice you'd order 18 panels and one gate unit, adjusting slightly for the gate). At 6 feet tall, this fence needs 3 rails per span, so roughly 57 rails if buying dimensional lumber for rails separately, though most panelized systems bundle rails into the panel price already.

Concrete: 21 posts × 2 bags per post = 42 bags. At $6.50 per bag, that's $273 in concrete alone. Posts at $22 each: 21 × $22 = $462. Panels at $45 each: 19 × $45 = $855.

Total material cost comes to $462 + $855 + $273 = $1,590, before gate hardware (hinges, latch, typically $30-$80 per gate) and labor. Divided across 150 feet, that's $10.60 per linear foot in material alone — a useful benchmark when a contractor's all-in quote comes back and you want to know how much of it is labor markup versus raw materials.

Wood panel and picket fencing remains the most common residential choice, with pressure-treated pine panels running roughly $25 to $60 per 8-foot section as of 2026, and cedar or premium composite panels running $50 to $120 per section. Individual pickets for a custom-built fence run $2 to $6 each depending on width and wood species, with cedar and redwood commanding a premium over pine for rot resistance.

Chain link is the budget and low-maintenance option, with material costs typically running $6 to $15 per linear foot including posts, top rail, and fabric, before installation. It remains the standard choice for utility runs, dog kennels, and temporary security fencing where appearance is secondary to cost and durability.

Vinyl and composite fencing sits at the premium end, commonly $20 to $45 per linear foot for material alone, but requires essentially no painting or staining maintenance over its lifespan, which owners increasingly weigh against the higher upfront cost when planning a 15-20 year ownership horizon.

Post material and size also drive cost: pressure-treated 4x4 wood posts run $8 to $20 each, while heavier 6x6 posts for gates or taller fences run $20 to $45 each. Steel or aluminum posts for chain link or ornamental metal fencing run a comparable $15 to $35 each depending on gauge and coating.

Concrete for setting posts is a small line item individually — roughly $5 to $8 per 50-pound bag of fast-setting mix in 2026 — but adds up across a long fence run; a 40-post project can easily consume $250 to $400 in concrete alone, which is worth budgeting explicitly rather than treating as a rounding error.

Professional fence installation labor typically runs $10 to $25 per linear foot depending on style, region, and terrain, on top of material costs. Wood panel and picket fencing generally falls in the $10-$20 per linear foot labor range, chain link is often cheaper to install at $8-$15 per linear foot due to faster assembly, and ornamental or vinyl fencing frequently runs $15-$30 per linear foot given more careful alignment work.

Post-hole digging is the labor variable most affected by site conditions: rocky or root-filled soil, sloped yards requiring stepped or racked panels, and frost-line depth requirements in cold climates (often 36-48 inches in northern states) can all add meaningfully to labor time and sometimes require equipment rental like a gas-powered auger, typically $60-$120 per day to rent.

Gates add disproportionate labor cost relative to their small footprint, since they require precise framing, hinge alignment, and hardware installation to swing correctly and stay square over years of use; budgeting $150 to $400 in labor and hardware per gate, on top of the linear-foot fence rate, is a reasonable planning figure.

All-in installed cost, materials plus labor, commonly lands around $20 to $45 per linear foot for wood panel fencing, $15 to $30 per linear foot for chain link, and $35 to $75 per linear foot for vinyl or ornamental metal, as of 2026 U.S. pricing. A 150-foot wood panel fence might therefore run $3,000 to $6,750 fully installed.

Forgetting that spans, not fence length directly, determine post count is the most frequent arithmetic error — a fence isn't posts every 8 feet measured continuously from zero, it's posts at the start and end of every 8-foot span, which is why the +1 in the post formula matters and is easy to omit when estimating by hand.

Underestimating concrete needs for corner and gate posts: corner posts bear lateral load from two directions and gate posts bear the swinging weight and impact of the gate itself, so many installers use deeper holes and more concrete for these specific posts than for standard line posts, which this calculator's flat per-post average doesn't distinguish — budget extra for these positions specifically.

Not accounting for slope: on a sloped yard, panels are either stepped (each panel stays level but steps down the hill in increments) or racked (each panel is manufactured or field-adjusted to follow the slope at an angle). Racked panels typically cost 10-20% more due to the additional fabrication, and this should be priced before ordering, not discovered mid-installation.

Ignoring local frost-line and setback regulations: many municipalities require post holes below the frost line to prevent heaving, and most require a minimum setback from property lines that varies by fence height and jurisdiction. A fence built without checking local code can require costly rework or removal.

Pricing pickets and panels but forgetting gate hardware, post caps, and fasteners: these smaller items are individually inexpensive but commonly add 5-10% to the total material budget, and skipping them in an initial estimate is a common source of the final invoice exceeding the original quote.