๐งฑ Construction
Electric Fence Calculator
Electric fence energizers are rated in joules, and the power needed grows with the total length of wire because current leaks through grass and insulators. A short dry run of fence needs far less energy than a long one through wet vegetation.
How it works
Fence perimeter
Number of strands
Post spacing
Vegetation under the fence
Total wire needed
Posts needed
Minimum energizer rating
Fence length
Frequently asked questions
How do I use the Electric Fence Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.