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What does fair use mean?
Section 107 of the U.S. Copyright Act says qualifying fair use of a copyrighted work is not infringement. The law names criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, and research as examples of purposes that may support fair use. The examples are not categorical exemptions: the circumstances still have to be assessed under the statutory factors.
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This is a U.S. legal doctrine, not a universal copyright rule. Other countries may apply different exceptions or limitations.
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The statute says courts consider these factors, among other considerations that may matter in a particular case. They are a framework for analysis, not a scorecard: a favorable point on one factor does not guarantee an overall result.
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1. Purpose and character of the use
Consider what the user is doing with the work and whether the use is commercial or nonprofit educational. Some nonprofit educational and noncommercial uses may be more likely to favor fair use, but those labels do not settle the question. Courts may also consider whether a use is transformative—adding something new with a further purpose or different character rather than substituting for the original.
2. Nature of the copyrighted work
Consider the work’s relationship to copyright’s aim of encouraging creative expression. A highly imaginative work and a factual work may weigh differently. An unpublished work is less likely to favor fair use, but unpublished status alone does not rule fair use out; the statute requires consideration of the factors.
3. Amount and substantiality used
Courts consider both how much was taken and how important that portion is to the work as a whole. A short excerpt can still be substantial if it captures the work’s “heart.” In some circumstances, use of an entire work has been found fair. There is no universal quantity that resolves this factor.
4. Effect on the potential market or value
Consider whether the use displaces the original or harms an existing or reasonably potential market for it. The analysis can also consider what market effects might follow if similar uses became widespread.
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Is there a percentage or word count that counts as fair use?
No. There is no fixed percentage, number of words, pages, lines, or copies that guarantees fair use. The U.S. Copyright Office explains that no formula permits a predetermined amount to be used without permission. Quantity is only part of the analysis, and a small excerpt may still weigh against fair use if it takes a qualitatively central part of the work. See the Copyright Office’s Fair Use Index and “About Fair Use” guidance.
Are educational or nonprofit uses automatically fair use?
No. Teaching and nonprofit educational use appear among the statute’s examples, and educational or noncommercial purpose can be relevant to the first factor. But neither educational purpose nor nonprofit status automatically provides a defense. Commercial use also does not automatically rule fair use out; the court considers the circumstances across all the factors.
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How can you assess a planned use?
- Identify the material and the use. Clarify what copyrighted work you plan to use, how much you will use, and what you will do with it.
- Consider each factor. Assess purpose and character, the nature of the work, the amount and importance taken, and likely effects on the work’s market or value.
- Look for substitution. Ask whether your use serves a different purpose or instead could replace the original or a likely market for it.
- Avoid relying on a label or shortcut. “Educational,” “nonprofit,” “transformative,” or a small percentage is not by itself a guarantee.
These steps help organize the questions; they do not mechanically decide a legal outcome. The Copyright Office’s Fair Use Index offers summaries of court decisions searchable by subject and category. It is not exhaustive, generally reflects the highest court decision in a case, and is a starting point rather than legal advice.
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Why fair-use outcomes differ
The factors are applied to the particular facts and legal context, so one decision does not create a universal rule for every similar-looking use. For example, the Copyright Office Index, last updated in July 2026, lists Andy Warhol Foundation for the Visual Arts, Inc. v. Goldsmith, 143 S. Ct. 1258 (2023), as fair use not found, and American Society for Testing & Materials v. Public.Resource.Org, Inc., 82 F.4th 1262 (D.C. Cir. 2023), as a case where fair use was found. The different outcomes illustrate why the four-factor analysis must be tied to the record and context of each case.
Who can decide whether a specific use is fair?
Ultimately, only a federal court can determine whether a particular use is fair in a specific dispute. The Copyright Office says it cannot provide individualized legal advice. Its statute, FAQ, and Index can help explain the doctrine and show examples, but they do not approve a planned use. For a consequential use or an active dispute, consider consulting an attorney.
Read the governing text at 17 U.S.C. § 107 and the Copyright Office’s Fair Use FAQ.
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