Better Choices

Sheep Lice Cost Calculator

This calculator helps you estimate the financial impact of lice in your flock.


  1. Select the Degree of Lice Infestation from the drop down list*
  2. Insert your flock information into the other fields,
  3. The calculator will then estimate the cost of lice infestation on your flock.

* Light infestation = less than 1 louse/parting; Medium infestation = 1-5 lice/parting; Heavy infestation = greater than 5 lice/parting

Degree of Lice Infestation
Number of Sheep in Mob
Percentage of Mob Infested (%)
Lice Free Sheep Lousy Sheep
Greasy Fleece Weight (kg) 5.34
Wool Scouring Yield (%) 71.0
Clean Fleece Weight (kg) 3.96 3.79
Price (cents)/kg Clean 833.0

Fleece Value ($)/Sheep
Fleece Value Reduction ($)/Head Infested
Fleece Value Reduction (%)/Head Infested
Total Estimated Fleece Value/ Mob
Total Estimated Loss due to Lice/ Mob

Cost to treat lice with Avenge*
*based on a 60mL dose at average retail price.

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