Deer Fence Calculator
8 ft deer fence feet, posts, and rolls from garden acres.
What it does
Deer clear low fences like garden gates. Eight foot woven wire around the plot stops jumpers where sprays fail.
The tool above squares the acres into perimeter. One acre needs 835 ft of fence with 70 posts in 3 rolls. The metric match is 0.4 ha toward 253 m.
Eight feet is the working height. Six foot fences invite jumps while slanted outriggers help where height limits rule.
Posts every twelve feet carry tension. Braced corners and gates hold wire tight through seasons.
Rolls run three thirty feet. Three rolls cover an acre with joining sleeves.
How to use
- Pick imperial (acres, ft) or metric (ha, m).
- Enter area: 1 acre or 0.4 ha suits the default.
- Read fence length first.
- Read posts next.
- Read rolls and brace corners.
Formula
- area
- Garden area in acres or ha.
Square plots assumed with 12 ft post spacing and 330 ft rolls. Metric runs meters at 0.3048 per foot.
Worked example
Example: 1 acre garden
Imperial defaults: 1 acre. These are also the default values, so the page opens on this answer.
- Plot: 1 acre square.
- Side: sqrt(1 x 43560) = 208.7 ft.
- Perimeter: 4 x 208.7 = 835 ft after rounding (834.8).
- Posts: ceil(835 / 12) = 70 posts after rounding (69.6 rounds up).
- Rolls: ceil(835 / 330) = 3 rolls.
- Tool shows 835 ft fence, 70 posts, 3 rolls (330 ft).
Reference table
| Plot | Fence | Rolls |
|---|---|---|
| 0.5 acres | 590 ft | 2 rolls |
| 1 acre | 835 ft | 3 rolls |
| 4 acres | 1670 ft | 6 rolls after rounding (5.06 rounds up) |
Limits
- Square math only. Odd shapes vary.
- Gates need extra bracing.
- Snow and limbs need patrols.
- Local rules may limit height.
Common mistakes
- Six foot fences deer laugh over.
- No corner bracing tension.
- Gates sagging open gaps.
- Skipping ground skirts for fawns.
- Plastic mesh deer chew through.
Try it yourself
Quick checks. Answers sit tucked under each question.
4 acres?
Side is sqrt(4 x 43560) = 417.4 ft. Perimeter is 4 x 417.4 = 1670 ft after rounding (1669.6). Posts are ceil(1670 / 12) = 140 posts after rounding (139.2 rounds up).
0.1 acres?
Side is sqrt(0.1 x 43560) = 66 ft. Perimeter is 264 ft. Rolls are ceil(264 / 330) = 1 roll.
Questions
Fence length?
Square the acres to feet of side, times four. Here 4 x 208.7 = 835 ft.
Why 8 ft tall?
Eight feet of woven wire stops jumpers. Shorter fences need slanted outriggers.
Posts?
One post per 12 ft. Here ceil(835 / 12) = 70 posts.
Wire rolls?
330 ft rolls. Here ceil(835 / 330) = 3 rolls.
Gates included?
Yes. Gates need braced corners that hold tension.
Maintenance free?
No. Snow loads and falling limbs need patrols.