Vinyl fencing is sold as complete panel kits, typically 6 or 8 ft wide, that slot into routed posts. Each run needs one more post than panels, gates need their own posts, and every post is set in concrete. Corners and ends use corner or end posts; line posts take panels on both sides.
How to use the Vinyl Fence Calculator
- Total fence length
- Panel width
- Number of gates
- Gate width
- Concrete bags per post
- Price per panel
- Price per post (with cap)
- Price per gate
- Price per bag of concrete
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter the total fence length, panel width, the number and width of gates, bags of concrete per post and prices. The calculator subtracts the gates, rounds up the panels, counts posts and caps, and totals the materials.
Tips for an accurate estimate
- Sketch the job and split irregular areas into rectangles, circles and triangles before you measure.
- Add a waste allowance – typically 5–10% for simple layouts and 15–20% for diagonal, curved or heavily cut work.
- Check the coverage or yield printed on the product, because sizes and densities vary between manufacturers.
- Buy all units of a finished material (tile, brick, siding) from the same batch so colours match, and keep a few spares for repairs.
- Confirm local prices – quarry, lumber and steel prices vary widely by region and season.
Common mistakes to avoid
- Ordering exactly the calculated amount with no allowance for breakage, offcuts and settlement.
- Forgetting to subtract doors, windows and other openings – or subtracting small ones that still need cutting around.
- Confusing US short tons (2,000 lb) with metric tonnes (1,000 kg) when comparing quotes.
Inputs explained
| Field | What to enter |
|---|---|
| Total fence length | Units: ft, m, in, yd, cm |
| Panel width | Choose one: 6 ft, 8 ft, 1.8 m, 2.4 m |
| Number of gates | A number |
| Gate width | Units: ft, m, in, yd, cm |
| Concrete bags per post | A number |
| Price per panel | Units: /piece |
| Price per post (with cap) | Units: /piece |
| Price per gate | Units: /piece |
| Price per bag of concrete | Units: /piece |
What each result means
- Panels = ceil(max([Total fence length] – [Number of gates]×[Gate width], 0)÷[Panel width] – 0.000001)
- Posts and caps = [Panels] + 1 + [Number of gates]
- Bags of concrete = [Posts and caps]×[Concrete bags per post]
- Total material cost = [Panels]×[Price per panel] + [Posts and caps]×[Price per post (with cap)] + [Number of gates]×[Price per gate] + [Bags of concrete]×[Price per bag of concrete]
- Cost per foot = [Total material cost]÷[Total fence length]
Example values
How the main result changes when Total fence length changes and everything else stays at the example values above:
| Total fence length (ft) | Panels |
|---|---|
| 75 | 12 |
| 112.5 | 19 |
| 150 | 25 |
| 187.5 | 31 |
| 225 | 37 |
| 300 | 50 |
Formula
Panels = ceil((fence length − gates × gate width) ÷ panel width)Posts = panels + 1 + gatesConcrete = posts × bags per postWorked example
Inputs — Total fence length: 150 ft; Panel width: 6 ft; Number of gates: 1; Gate width: 4 ft; Concrete bags per post: 2; Price per panel: $120 /piece; Price per post (with cap): $45 /piece; Price per gate: $250 /piece; Price per bag of concrete: $6.5 /piece.
Results — Panels = 25; Posts and caps = 27; Bags of concrete = 54; Total material cost = $4,816.00; Cost per foot = $32.11 /ft.
Frequently asked questions
How many posts do I need for a vinyl fence?
One more than the number of panels in each straight run, plus an extra post for every gate and corner.
How deep should vinyl fence posts be?
About one-third of the post length – 2–3 ft for a 6 ft fence – and below the frost line in cold climates.
Can I cut vinyl fence panels?
Yes, with a fine-tooth blade; you will need to re-rout or bracket the cut end.
What formula does the Vinyl Fence Calculator use?
Panels = ceil((fence length − gates × gate width) ÷ panel width).