Deer fence calculator
Size a deer barrier at the 8 foot height deer respect, with a full post, panel and concrete take-off for the run.
Fence calculator
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Overview
Deer clear 4 to 5 foot fences routinely, which is why deer exclusion starts at 8 feet: at that height most fencing becomes effective because deer generally will not jump blind. This calculator preloads 8 feet as its working height.
The take-off still runs like any fence: perimeter, posts, panels or mesh, concrete and gates, at the barrier height you set. Where an 8 foot unified fence is impractical, angled or double-fence layouts change the geometry, which the linked guide covers.
Common mistakes
- Fencing at 4 to 5 feet because it "looks like enough", which deer clear without thinking about it.
- Planting or feeding on the outside of the barrier, baiting the very animals the fence is meant to exclude.
- Using a fence too rigid to tolerate deer leaning and rubbing at the 6 to 8 foot range where they test the barrier.
Related calculators
- Horse fence calculator Plan a livestock-safe horse fence at the commonly cited 4.5 to 5 foot height, with post spacing and full material take-off.
- Fence cost calculator Estimate total fence cost from run length, height and your local material and labor rates, with the budget math shown.
- Chain link fence calculator Calculate line posts, terminal posts, top rail and concrete for a chain link fence run, with 10 foot post spacing as the default.
Related reading
In-depth guides
Frequently asked questions
Why is 8 feet the deer fence height?
Deer regularly clear 4 to 5 feet and can jump higher when motivated, but they rarely jump blind: fences at 8 feet are the generally cited effective exclusion height because deer stop testing what they cannot see over. Effective, not immune: confirmed jumpers do exist, which is why the guide covers doubles and angles.
Will a 6 foot fence stop deer?
Often but not reliably. A motivated deer clears 6 feet, and with a running start and a visible landed side it will, so 6 foot fences get described in the field as a deterrent that leaks. The honest standard is 8 feet or a double- or angled-fence modification.
Does deer fencing need gates?
Yes: anything you walk or drive through needs a gate, and deer-fence gates are sized to the opening the same way any gate is, with the latch gap kept tight so the run stays a true barrier. The gate calculators size that opening.
Is a single 8 foot fence or a double fence better?
A single 8 foot fence works in most settings. A double fence, two shorter fences a few feet apart, or an outward-angled top section breaks the deer's clean jump path where 8 foot single fencing is impractical or ugly, which the deer fence guide lays out by layout.
Does the fence need to be solid at 8 feet?
No, and it is usually not: deer respond to the height and line more than the opacity, so woven mesh or netting at 8 feet does the exclusion work far cheaper than an 8 foot solid wall of wood, which is why the mesh options sit in the material choices.
How do I fence a backyard when 8 feet looks too tall?
Step the design: a shorter privacy fence on the living side with a taller deer line on the exposed runs, or an angled top extension that reads shorter from inside the yard. The fence cost and perimeter calculators handle the split-run take-off either way.
Does deer fencing protect gardens or just property lines?
Both. Garden-size runs often use the same 8 foot principle on a smaller scale, which is exactly what this calculator supports, since the material math is identical whether the run is a garden bed or a boundary.
How much does an 8 foot deer fence cost?
Taller fencing costs more per linear foot: more post and more fabric at the same spacing. Run the take-off at 8 feet here, then apply your local unit prices in the fence cost calculator for the honest total before you commit to a scheme.