Fair Use is an exemption to copyright law that allows the use of copyrighted works without permission or payment of fees in order to encourage teaching, learning and scholarship. However, a fair use determination must be made for each intended use, and the answer may still be vague or murky. The only way to get a definitive answer on fair use is for a case to go to court and receive a ruling from a judge. However, this very rarely happens.
Use the fair use evaluator tool in order to better understand the four factors of fair use and make your own evaluation of your use of a copyrighted work. The tool generates a PDF of the evaluation for your own records.
Principles of Fair Use
Purpose or character of the use
Nature of the work being used
Amount of the work being used, and its substantiality in relation to the whole
Effect of the intended use on the market