What plagiarism percentage is acceptable?
The most common question is "what percentage of plagiarism is allowed?". The honest answer: there is no single number for everyone. The requirement is set by the organisation that accepts the work, and the same text can get different percentages in different services. Below: where to find the requirement and how to read the result.
Who sets the threshold
For coursework, graduation projects and master's theses the requirement is usually written in the university's regulations or a department decision; for PhD and DSc work, in the academic council's and journal's requirements. It can differ by type of work even within one university. The most reliable source is your supervisor or department: ask in writing what percentage is required and which system is used.
Why services give different percentages
Each checker compares against its own database: one has more Russian sources, another Uzbek academic works, a third only the open web. Rules for counting quotations also differ. So "15% in one system, 30% in another" is normal. What matters is which system accepts your work and which sentences the result points to.
What matters more than the percentage
Read the result by sentence, not by the number. A properly cited quotation, the name of a law or standard, and common terms may match — that is not copying. The real problem is paragraphs copied without a source. PlagiatX shows the source next to each red sentence, so it's clear what to rewrite and where to add a citation.
Originality and the AI percentage
PlagiatX gives two figures: plagiarism (P) and the probability that the text was AI-written (A). Originality = 100 − (P + A − P×A/100) — the formula is the same on the site, in the PDF report and in the QR certificate. If the requirement covers plagiarism only, check in "plagiarism only" mode. The AI figure is a probability, not a verdict.
Questions
Is a PlagiatX certificate an official university document?
No. It is a digital confirmation of the check result: anyone can verify it via the QR code. Which system's result is accepted is decided by the university.
How can I lower the percentage honestly?
Rewrite unsourced passages in your own words and add citations plus a bibliography entry for the rest. See the article "Lowering your plagiarism score honestly".
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- How to check a dissertation or paper for plagiarism — A practical guide: what to prepare before checking a master's, PhD or DSc thesis or a paper, how to read the result and how to find your university's requirement.
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- ChatGPT and academic work: what an AI detector shows — How an AI detector works, how far to trust its result and how to use artificial intelligence honestly in academic work.
- How to format quotations and references correctly — Direct quotes, paraphrase and the reference list: how to format sources so your work isn't plagiarism — with examples.
- How to lower your plagiarism score honestly: 7 steps — High plagiarism score? How to read the result, format quotations and rework the text honestly — step by step.
- How to verify a plagiarism certificate — For supervisors and departments: verify a PlagiatX PDF certificate's result in a minute using its QR code and number.
Plagiat necha foiz bo'lishi mumkin?
Eng ko'p beriladigan savol: "necha foiz plagiat ruxsat etiladi?". Halol javob — hamma uchun bitta raqam yo'q. Talabni ishni qabul qiladigan tashkilot belgilaydi, va bir xil matn turli xizmatlarda turlicha foiz olishi mumkin. Quyida — talabni qayerdan bilish va natijani qanday o'qish.
Какой процент плагиата допустим?
Самый частый вопрос: «какой процент плагиата допустим?». Честный ответ — одной цифры для всех нет. Требование устанавливает организация, которая принимает работу, а один и тот же текст в разных сервисах может получить разный процент. Ниже — где узнать требование и как читать результат.
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