Quick answer: panels = fence length ÷ post spacing (on centre), rounded up on each side; posts = panels + 1 per side, plus one per gate, minus shared corners; one cap per post.
How to calculate a vinyl fence
- Enter each straight side and its gates. Fence length = side − gates × gate width.
- Panels = fence length ÷ post spacing, rounded up, plus one per gate (the counts allow for a gate anywhere on the side).
- Posts = panels + gates + 1 per side; joined sides share the corner post. Post caps = posts.
Example: three sides with a gate
Sides 48, 96 and 48 ft, ends open, one 4 ft gate in the long side, 6 ft spacing:
- Panels 8 + (⌈92 ÷ 6⌉ + 1 = 17) + 8 = 33.
- Posts 9 + 19 + 9 − 2 shared = 35, with 35 caps.
Spacing differs between products; use the on-centre figure from your panel maker. No building code or HOA rule is applied.
Frequently asked questions
How many vinyl fence panels do I need?
One panel per section. Divide each side’s fence length by the post spacing on centre from the panel maker’s instructions and round up: 48 ft at 6 ft spacing is 8 panels. A short section at the end is a cut panel.
How many posts for a vinyl fence?
One more post than panels on each side, plus a post for each gate, minus one for each corner two sides share. Vinyl posts are sold as line, corner, end and gate posts, so note where each one goes.
What is the spacing for vinyl fence posts?
It depends on the product: the panel width plus the post, as stated by the maker. Enter that on-centre figure; the calculator uses 6 ft (1.8 m) until you change it.
Do I need post caps?
Most vinyl posts take a cap. The calculator lists one cap per post.
Does this include concrete for the posts?
No. Hole size and depth depend on the product, fence height, soil and frost depth. Use the concrete or Sonotube calculator once you know the hole size.
Is this vinyl fence calculator free to use online?
Yes. The CalcWall Vinyl Fence Calculator is completely free and works online in any browser, on a phone, tablet or computer. There is nothing to download and no account to create, and the math runs right in your browser, so results appear as you type.