Antimicrobial Use (AMU) Calculator

Antimicrobial Use  (AMU) Calculator  - A freely available tool to measure antimicrobial use on farm

Antimicrobial use in livestock continues to be a prominent topic in the mainstream media. Veterinarians in the farm and animal industry are gatekeepers of antibiotic usage and a key route to reduction is raising awareness and non-antimicrobial disease prevention.

The University of Nottingham School of Veterinary Medicine and Science Herd Health Group have developed an online calculator to evaluate antibiotic use on dairy farms. This user-friendly calculator can be used to evaluate key areas and to encourage antibiotics use more responsibly.The medicines used on the farm can be entered into the calculator and the products will be converted into commonly used measurements of antimicrobial use (mg/Population Correction Unit (PCU) – PCU and Defined Daily Dose – DDD). Use of highest priority critically important antimicrobials (CIAs) can also be highlighted. To complement the antibiotic calculator, the University of Nottingham have also created a Benchmarking Tool, designed to make benchmarking dairy farm antimicrobial usage rapid and simple. 

From the research into developing this calculator, the infographics illustrated under the six common diseases provide alternative antibiotics treatments and methods to help reduce antibiotic usage. Click on each disease to find alternative treatment options.  

Digital Dermatitis

Clinical Mastitis 

Bovine Respiratory Disease


Claw Horn Lameness

Selective Dry Cow Therapy

Please remember all antibiotics (and other medicines) policies should be discussed with your own veterinary surgeon.

*Please note: We are experiencing issues with Firefox. When opening the calculator please use Internet Explorer or Google Chrome.