Vinyl Fence Calculator
Enter your run, section width and any corners or gates — get the sections, post caps and the exact mix of line, end, corner and gate posts to order.
↺ Loaded the fence length from your last calculation. Edit any field to change it.
Ordering a vinyl fence right
Vinyl fences go up fast, but only if the box that arrives has the right parts. The two things people get wrong are the post types and the last section. Vinyl posts are not interchangeable — each is routed for a specific spot — and vinyl sections don't trim down as easily as a wood fence, so a stubby end section is a real headache. This calculator handles both: it splits your posts into the four types you actually order and shows how wide the final section lands.
Mind the last section
Because vinyl sections are pre-routed rails with locking pickets, cutting one to fit is fiddly and loses the pocket that snaps into the post. If the calculator shows a short final section, you have three good options: nudge the post spacing so every section lands full, put the short section somewhere it won't be noticed, or adjust the run length slightly if the layout allows. Knowing the number before you order saves a return trip.
Every post gets concrete
Vinyl posts are hollow, so all their strength comes from the footing — every post is set in concrete, and gate and corner posts often get a rebar or pressure-treated wood insert for extra stiffness against the load. The concrete figure here is a quick estimate; for an exact bag count by hole size, use the post concrete calculator.
Before you buy
- Add a post cap for every post — they're a separate part and easy to forget.
- Reinforce gate and corner posts with an insert; hollow vinyl alone will flex over time.
- Check post length covers the panel height plus 2 feet or more in the ground.
- Buy from one lot so the white or tan color matches across every section.
Estimates only — confirm section width, post routing and hardware for the exact vinyl system you buy.
Frequently asked questions
How many vinyl fence sections do I need?
Subtract any gate openings from your total run, then divide by the section width (usually 6 or 8 feet) and round up. This calculator does it for you and, importantly, shows the width of the final section — because vinyl sections are much harder to cut down than wood, so you want to know before you order.
What are the different vinyl post types?
Vinyl posts are routed (slotted) differently depending on where they sit: line posts have slots on two opposite sides, end posts on one side, corner posts on two adjacent sides, and gate posts are blank and usually reinforced. You must order the right count of each — a line post cannot be used at a corner. The calculator splits your total post count into these types.
Why can't I just cut the last vinyl section to fit?
Vinyl sections are pre-routed rails with tongue-and-groove pickets, so trimming one means cutting the rails and losing the routed pocket that locks it into the post. It can be done but it is fiddly. Most installers instead nudge the post spacing so every section lands full, or plan the short section into a spot it won't show. That is why the last-section width matters.
Do vinyl posts need concrete?
Yes. Vinyl posts are hollow and rely entirely on the concrete footing for strength, so every post is set in concrete — often with a rebar or wood insert in gate and corner posts for extra rigidity. The concrete figure here is an estimate for a 10-inch-wide, 24-inch-deep hole around a 5-inch post; deeper holes for tall panels use more.
What section width should I choose?
Six and eight feet are the common vinyl section widths. Eight-foot sections cover a run with fewer posts and less concrete; six-foot sections are stiffer, handle slopes better, and are easier to keep looking even on a winding run. Check the product — the section width fixes your post spacing.