How to Use Our Calculator
Enter the length of your current or proposed fencing in metres into the cells. Please note the following:
a. This represents the ground covered; the number of wires is not considered at this stage.
b. For example, if your system includes 300 m of 3-wire poly wire fencing, enter 300 in the cell“
c. "Vegetation " refers to high tensile fencing placed in front of a hedge or a multi-wire subdivision fence where pasture reaches the bottom strand.
View Recommended Output Joules
Click the green Calculate button, the calculator displays the recommended minimum output in joules. We suggest purchasing an energiser of this size or larger.
Output Joules Calculator
Enter the length of your fencing in Metres only (use the ground distance covered)
Why Does the Number of Wires Not Matter?
Regardless of the number of wires, if you have two or more, you need to join them together at one end to power all lines from the energiser. More wires on a fence reduce resistance, improving efficiency. However, additional wires can increase the likelihood of contact with vegetation, which may negate the benefits of lower resistance. To maximise the efficiency of multi-wire fences, join the wires at both ends for optimal conductivity. We offer line-to-line connectors and triple jumper leads on our website, or you can use spare wire to achieve this.
Should I Size Up My Energiser?
Our calculator accounts for wire resistance and vegetation—factors that energiser manufacturers often overlook when advertising power ranges (similar to how a car’s advertised mpg might differ from real-world performance). We recommend sizing up your energiser if you anticipate future expansion of fencing that the energiser will need to power. Choosing a larger unit could save you time and money in the long run.
FAQ
What voltage readings should in be looking for ?
our calculate is aimed at giving you readings of 3500V for cattle and 5000v for sheep/mixed. if your training your animals to electric fencing we recommend • Sheep – Minimum 6000V
• Cattle – Minimum 5000V
Whats the difference for high tensil wire and poliwire/tape?
more resistense due to materials so less condutive which is why.
tips to remeber?
Remeber you are powering all the poliwire on the spool if if you have 400m of poliwire on your spool/reel on a 200m fence its still 400m (0.4km )
Should I Size Up My Energiser?
Our calculator accounts for wire resistance and vegetation - factors that energiser manufacturers often overlook when advertising power ranges (similar to how a car’s advertised mpg might differ from real-world performance). We recommend sizing up your energiser if you anticipate future expansion of fencing that the energiser will need to power. Choosing a larger unit could save you time and money in the long run.
earthing
Progressive Farming’s Fence Power Calculator
Use this calculator to find the minimum energiser output your electric fence needs. Built on Progressive Farming’s practical on-farm experience, it helps you choose the right power for reliable and effective fencing.