Fence Panel Calculator
Calculate the number of pre-built fence panels needed.
Last updated 2026-08-21
What Is a Fence Panel Calculator?
The fence panel calculator estimates how many pre-built fence panels you need to cover a run of fence. Enter the total fence length and the panel width, and it rounds up to a whole number of panels.
How It Works
Panels = ceil(Fence length ÷ Panel width).
Example
60 ft of fence with 8 ft panels: 60 ÷ 8 = 7.5 → 8 panels.
How to Calculate
- Measure the total length of fence in feet. A 60 ft run is common for a backyard.
- Choose a panel width, usually 6 or 8 ft for pre-built panels.
- Enter the length and panel width. At 60 ft and 8 ft panels, 60 divided by 8 is 7.5, so you need 8 panels.
- Remember that panels span between posts, so you still need posts at each joint and at any gate.
- For an odd leftover length, round up to a full panel and trim it to fit, or have a custom panel built.
Fence Panels Needed by Run Length
| Fence Length | 6 ft Panels | 8 ft Panels |
|---|---|---|
| 20 ft | 4 panels | 3 panels |
| 40 ft | 7 panels | 5 panels |
| 60 ft | 10 panels | 8 panels |
| 80 ft | 14 panels | 10 panels |
| 100 ft | 17 panels | 13 panels |
Sources
Frequently Asked Questions
What size are pre-built panels?
Common widths are 6 and 8 ft, in heights of 4, 5, and 6 ft.
Do panels include posts?
No — panels span between posts, so you still need posts at each joint and gate.
How do I handle odd lengths?
Round up to full panels; the last section can be trimmed or custom-built.
Estimate the cost with the Fence Cost Calculator or browse Fence Calculators