Direct answer
If you've just typed "check my similarity," you're probably staring at a finished draft and wondering what an instructor's Turnitin report would actually show. The similarity report is the official view professors use to review how much of your paper matches existing sources, and knowing your score before you submit is the difference between a clean submission and a stressful meeting [1]. This guide walks you through how the score is calculated, how to check your paper in advance, and where to get an official report before your deadline.
Introduction
If you've just typed "check my similarity," you're probably staring at a finished draft and wondering what an instructor's Turnitin report would actually show. The similarity report is the official view professors use to review how much of your paper matches existing sources, and knowing your score before you submit is the difference between a clean submission and a stressful meeting [1]. This guide walks you through how the score is calculated, how to check your paper in advance, and where to get an official report before your deadline.
How Does Turnitin Calculate My Similarity Score?
The similarity score is simply the percentage of your paper's text that matches content in Turnitin's comparison database, which includes billions of web pages, academic journals, books, and previously submitted student papers [2]. A 15% score means that roughly 15% of your paper matches text found somewhere in that database — it is not a verdict on whether you plagiarized, and it says nothing about the quality of your writing.
Turnitin breaks the overall percentage down into individual match sources so you can see exactly which phrases triggered the score [2]. Each match is highlighted in the report with a colored indicator and a clickable link to the original source, which lets you judge whether a match is a properly cited quotation, a common phrase, or a passage that needs rewriting.
Exclusions also play a role in how your score is calculated. Instructors commonly exclude quotes, bibliographies, and small matches (often under a small threshold) before interpreting the result, so the same paper can display different percentages depending on those settings [2].
How Can I Check My Similarity Before Submitting My Paper?
The most common way students check their score early is through their class assignment page. Many instructors enable draft submissions, which let you upload your paper, generate a similarity report, and revise before the official due date — and when permitted, the report is visible to you directly in the assignment inbox [3].
The key is to check early enough to act on the results. A report that comes back in your final hour leaves no time to rewrite matched sections or fix citation errors, while checking a few days before submission gives you a realistic window to clean up the flagged content [3].
If your instructor hasn't enabled drafts, or you'd rather keep your draft private before submission, you can use an independent checking service that runs the same official report. Either way, the goal is the same: see your similarity score, review the highlighted matches, and fix what needs fixing before the paper ever reaches your university's system [3].
Where Can I Get an Official Turnitin Similarity Report Before Submission?
When you upload your work through an official checking route, you get more than just a number. The full report combines the similarity percentage with the AI writing report, so you can see both matched sources and any AI-flagged prose in one place — the same view an instructor sees in their academic system [4].
Turnitin's own guidance is clear that the AI writing report and the similarity report should be read together, because a paper can be fully original yet still contain AI-generated passages that need attention [4]. Getting this combined view before submission is the only way to know whether your draft is truly submission-ready on both fronts.
That's exactly what turnitin0 is built for. You upload your.docx,.pdf, or.txt file and receive the real Turnitin AI and similarity reports before you submit, with most results delivered in about 10 minutes. The reports are never archived and are never sent to any third-party database, so your draft stays private while you verify your score.
You already know what a similarity report is and how it's calculated — now put that knowledge to work before your deadline. With turnitin0, you can check your similarity and your AI writing report in minutes, see exactly which sources matched and which passages were flagged, and fix them before your paper ever reaches your instructor's inbox. See what your report actually looks like before you submit.
※ Turnitin0.com - Actual Turnitin AI Report Cover, Score, Flag And Similarity Summary
FAQ
How high can my similarity score be before it becomes a problem?
There is no universal cutoff. Instructors and institutions set their own acceptable thresholds for a full paper, and the number that matters is the one your course specifies — along with whether the flagged matches are properly cited [1][3].
Does a high similarity score automatically mean I plagiarized?
No. The similarity report only shows matched text; it does not judge intent or citation quality. A properly quoted and cited paper can still produce matches, which is why instructors review the report in context [2].
Can I check my similarity without submitting my paper to my university?
Yes. If your instructor hasn't enabled draft submissions, you can run the official report through an independent service like turnitin0, which returns the same similarity and AI writing reports without archiving your paper.
Will my draft be saved in Turnitin's database if I check it?
Only if the check happens through a repository-connected submission. turnitin0 does not archive submitted papers and never sends them to any third-party database, so your draft remains private.
Should I check the AI writing report at the same time as similarity?
Yes. Because instructors receive both reports together, checking them together gives you the full picture of your submission before you hit submit [4].