Construction
Stair design
Calculate riser height and going from total rise, run and step count.
Calculators / Construction / Fence material
Fence material calculator
Estimate fence panels and posts for a straight run.
On this page
Panels required18panels
Posts required18posts
Calculator controls
How to calculate
Estimate fence panels and posts for a straight run.
panels = ceil(run length ÷ panel width × (1 + extra)); posts = bays + runs
Worked example
Fence run length (m): 30; Panel width (m): 1.8; Separate fence runs: 1; Extra panels (%): 5.
Panels required: 18 panels; Posts required: 18 posts.
Assumptions and limits
Corners, gates, slopes, end conditions, panel cutting, and local post-spacing rules can change quantities.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Estimate fence panels and posts for a straight run. The result follows the displayed formula and keeps every adjustable assumption visible.
When this tool is useful
Use this tool to plan quantities or compare scenarios before making a purchase or technical decision.
Understanding your inputs
| Input | What to enter |
|---|---|
| Fence run length (m) | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Panel width (m) | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Separate fence runs | Enter a number of at least 1 and no more than 1000. |
| Extra panels (%) | Enter a number of at least 0 and no more than 100. |
Frequently asked questions
What can change the fence material result?
Corners, gates, slopes, end conditions, panel cutting, and local post-spacing rules can change quantities.
Should I round the inputs first?
No. Enter the best measurements available and round only the practical final quantity, such as full packs, boards, sheets, or components.