Biology
Estimate wire length and posts for a rectangular paddock.
Your inputs
Change any value — everything updates instantly.
Paddock length.
Paddock width.
Cattle 4–5 barbed.
Line post spacing.
Try an example
Wire needed
7,920 ft
This means about 7,920 ft of wire and 165 posts.
What you are seeing
Each bar grows to show a result for your inputs.
The top bar is the main answer: 7,920 ft.
Change wire strands (now 4) and the bars update instantly.
Perimeter
1,980 ft
2 × (L + W).
Posts
165 posts
Perimeter ÷ spacing.
Result explanation: Wire needed
7,920 ft.
Real-life comparison: With wire strands 10% higher, the answer would be 8,712.
Low, normal or high? Use this as an estimate based on the stated formula.
How the result changes with wire strands
How to read this chart: The line shows the result across a range of values. The dot marks your input.
Estimate wire length and posts for a rectangular paddock.
This means about 7,920 ft of wire and 165 posts.
Excludes gates and bracing.
Each strand runs the full perimeter.
wire = 2(L + W) × strands
Symbols
Why this formula works
Each strand runs the full perimeter.
Unit check
Units match on both sides ✓
Worked example
Common mistakes
This means about 7,920 ft of wire and 165 posts.
Add 5–10% for ties and sag.
Need braced assemblies.
Subtract gate widths.
Fewer posts often.
Important limitation. Excludes gates and bracing.
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
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