Fence-run and material coverage planning
Fence Calculator
Measure straight fence spans and openings, add explicit extra, then optionally estimate per-span whole panels or simple non-overlapping pickets from actual coverage dimensions.
Estimate fence run and coverage
Measure straight uninterrupted spans → identify measured openings → add explicit extra → optionally plan whole panels or simple non-overlapping pickets per physical span.
Fence-run and coverage planning without structural guesswork
How the Fence Calculator works
ProjectFigures measures straight fence-covered spans and measured openings, applies one explicit extra allowance, then optionally estimates whole panels or simple non-overlapping pickets from actual coverage dimensions you supply.
What does this Fence Calculator calculate?
Fence V1 calculates net fence run and explicit extra. If you provide an actual installed panel coverage width, it can estimate whole panels per physical span. If you provide actual picket face width and clear internal gap, it can estimate simple non-overlapping pickets using an endpoint-aware spacing formula.
Measure one straight uninterrupted fence span at a time
A fence span is one straight material-covered physical run. Split your measurements at every corner, end, measured gate/opening and independent run. This matters because a whole panel or picket cannot automatically bend around a corner or bridge an opening.
Gates and other measured openings
Add an opening row for a measured no-fence span. Measured-spans mode reports gross entered alignment as fence spans plus openings, while net fence run contains fence spans only. The opening is not subtracted a second time, and Fence V1 does not infer a gate product, gate posts, hinges, latches, framing or reinforcement.
Known net fence length
Known Net Length mode is for one continuous material-covered span that already excludes gates and openings. If your known total combines corners, separate runs or openings, use measured spans before relying on per-span whole material counts.
Actual panel coverage vs a common panel label
Fence products sold under a common width can have different actual installed dimensions. Panel mode therefore asks for the actual usable installed horizontal coverage from your real product/system plan. It does not silently assume six or eight feet.
Why panels round per physical span
With two separate 50 ft spans and 8 ft actual panel coverage, Fence V1 plans 7 panels for the first span plus 7 for the second: 14 total. A global ceil(100 ÷ 8) = 13 calculation is rejected because it assumes one panel can bridge a corner, end or opening.
Panel cuts and offcuts are not optimized
Some fence systems allow panels to be cut; others have product-specific restrictions and hardware. V1 makes no universal cut assumption and does not reuse offcuts between spans. The count is deliberately labeled per-span whole-panel coverage planning.
Actual picket face width and clear gap
Simple picket mode uses the actual face width and an explicit clear gap between adjacent pickets. There is no hidden gap default. Zero is accepted when you intentionally enter zero. Nominal/common lumber labels should not be substituted for a known actual face width.
Endpoint-aware picket spacing
For N simple non-overlapping pickets, coverage is N × face width + (N−1) × clear gap. That means there are exactly N−1 internal gaps, with no hidden gap before the first picket or after the last. Fence V1 therefore uses (span + gap) ÷ (face width + gap) before safe whole-count rounding.
Board-on-board and shadowbox layouts are different
Overlapping, alternating, shadowbox, basketweave, louvered and other custom layouts use materially different geometry. Fence V1 does not apply the simple face-width-plus-gap formula to those styles.
Waste / extra fencing
ProjectFigures starts at 0% so it does not hide a manufacturer, retailer, corner, slope or cut multiplier. Choose a visible value from 0% through 100% appropriate to your actual project. The allowance is applied once to every fence-covered physical span.
Fence posts are outside V1
Fence V1 does not calculate post spacing, post count, corner/end posts, gate posts or shared posts. Those quantities can depend on the fence system, topology, gates, site conditions, structural requirements and local rules. No universal post spacing is supplied.
Rails are outside V1
ProjectFigures does not assume every fence uses two rails, three rails or one universal rail stock length. Rail courses, joints and hardware are product/layout-specific.
Gate hardware is not inferred from an opening
A measured gate opening only removes that physical span from fence-material coverage. It does not create a gate-unit count, gate-post count, hinge/latch quantity, frame or reinforcement requirement.
Chain-link systems need a different takeoff
Length-only mode can measure the net run of a chain-link project, but V1 does not calculate fabric rolls, splices, line posts, terminal posts, top rail, tension components, fittings, gates or concrete.
Slopes, racking and stepping
Fence products handle grade changes differently. V1 does not calculate slope angle, rackability, step height, grade cuts or custom fabrication and applies no hidden slope multiplier.
Height, property lines, code and underground utilities
Fence height is not a V1 quantity input. This calculator does not determine property lines, easements, setbacks, legal height, pool-barrier compliance, HOA approval, permits, buried utility clearance, wind design or structural approval. Confirm applicable local, property, utility and manufacturer requirements separately.
Post holes and concrete
Fence V1 does not determine post-hole count, diameter, depth, frost depth or concrete volume. If you independently already know approved/determined hole quantities and geometry, use the Concrete Calculator separately.
Packages and supplier products
Panels per pack, pickets per bundle, rails per bundle, posts per pack, fasteners per box and chain-link fitting kits vary by product and supplier. V1 does not invent package counts, supplier inventory or live pricing.
US and metric units
Length fields support feet, inches, metres, centimetres and millimetres. Valid physical values are stored canonically in metres so repeated unit switching does not chain from rounded display values.
Worked US example
Enter a 50 ft fence span, a 4 ft measured opening and another 50 ft fence span. Gross entered alignment is 104 ft, openings are 4 ft and net fence run is 100 ft. At 0% extra and 8 ft actual installed panel coverage, each 50 ft physical span rounds from 6.25 to 7 panels, so the per-span coverage plan is 14 panels—not 13 from one global 100 ft ratio.
Worked metric example
Enter 12 m of fence, a 1.2 m opening and another 8 m of fence. Net run is 20 m. At 5% extra, the two planning spans become 12.6 m and 8.4 m. With 1.83 m actual panel coverage they round separately to 7 and 5 panels, for 12 total.
Common fence-material estimating mistakes
- Rounding one global length instead of each corner/opening-separated physical span.
- Subtracting a measured gate/opening twice.
- Using a common/nominal panel label as actual installed coverage.
- Assuming every panel can be cut or every offcut reused.
- Using length ÷ (width + gap) without defining picket endpoint gaps.
- Applying simple picket math to board-on-board or shadowbox layouts.
- Inventing universal post spacing, post count or rail count.
- Inventing gate hardware from an opening width.
- Treating chain-link roll length as a complete chain-link system takeoff.
- Treating a quantity calculator as property, permit, utility, structural or code approval.
Frequently asked questions
Does this calculate fence posts?
No. Fence V1 intentionally provides no post-spacing recommendation or post count.
Should I subtract a gate from the fence length?
In measured-spans mode, enter the gate/opening as its own opening row and enter only the actual fence-covered spans around it. The calculator reports the opening but does not subtract it a second time.
Can I use an 8 ft panel width automatically?
No universal panel width is assumed. Enter your actual installed horizontal panel coverage.
How does picket spacing work?
Simple picket mode assumes N pickets have exactly N−1 internal clear gaps and no hidden end gaps.
Can I calculate board-on-board fencing?
No. Overlap layouts require a different model and are explicitly outside V1.
Does the calculator check my property line or local fence code?
No. Property, utility, permit, pool-barrier and code requirements must be checked separately.
Related tools
Continue to theContractor Job Pricing Calculator with your own supplier/labor figures. If you independently already know approved/determined post-hole count and geometry, use the Concrete Calculator. TheDeck Calculator is a sibling project-material tool.
Fence-run/material coverage planning only. No post spacing/count, rails, gate hardware, chain-link system takeoff, slope/layout optimization, property/code approval, post-hole concrete or package calculation.