Prefabricated Fence Panel Layout Calculator

Estimate prefabricated fence panels, posts, and the final cut section.

Inputs

Example: 28 ft panel fence

Five nominal 6 ft panels cover this straight 28 ft run, with the final panel cut to fit. Use installed panel width and confirm the product can be cut.

Fence panels
Enter length in feet.
Enter fence panel width in feet.
Formula, inputs and conditions

Formula: ceil(Length/Fence panel width)

Decimal results are displayed to two places when needed.

ceil rounds up to a whole number.

Inputs
Net run length and installed panel width. Check separately whether the final panel may be shortened.
Outputs
Panel count, post count, and final section length.
Conditions and scope
The example assumes one straight run, no gate, and a cuttable final panel; follow the manufacturer’s layout when cutting is not allowed.

Whole panels and a final partial span

Panel layout starts with the installed width of a panel, not just its nominal product name. When the run is not an exact multiple, the calculator shows the final covered length after the full panels. Cutting feasibility depends on the selected panel system.

Measure and calculate

  1. Measure the uninterrupted run length.
  2. Enter installed panel width, accounting for the actual post-to-panel layout.
  3. Use the final-panel mode to inspect the remainder and check whether the product can be shortened.
Calculation method

Panels = ceiling(run length ÷ installed panel width).

A worked example

Inputs
A 28 ft straight run uses 6 ft panels.
Calculation
Ceiling(28 ÷ 6) = 5 panels. Four full panels cover 24 ft, leaving 4 ft for the final span.
Result
5 panels

The estimate is 5 panels and, in the separate post mode, 6 posts. Plan any gates, corners and installation clearances separately.

Interpret the result

Output interpretation and next steps
Output or checkWhat it means for your project
Panels and postsPanel count rounds the run up to whole installed panel widths. A single open run uses one more post than panels.
Final panel lengthThe remainder describes the portion of the final panel used. When the length divides exactly, the final panel is full width; there is no extra zero-width panel.

FAQs

Why is the last panel not always a full panel?

A run can end between whole panel widths. The remainder is the final covered span, not a promise that the product can be cut.

What happens at an exact multiple?

The final panel is full width. The calculation does not add an empty extra panel at the end.