AI essay grader — honest grades before you submit.
Paste your essay and get a calibrated 0-100 score broken down by thesis, evidence, structure, style, and mechanics. Each criterion gets specific feedback with quoted phrases — not vague "improve flow" platitudes.
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How it works
Three steps. Done in 60 seconds.
Paste your essay
Or paste from Google Docs. Or write it directly in our editor with built-in AI text actions.
Optional: paste your rubric
Got a specific rubric from your professor? Drop it in and AI weights its scoring toward what your prof actually grades on.
Get an honest grade
Donut score ring, per-criterion bars, 3-5 strengths, 3-5 weaknesses (with quoted phrases), and 2-4 concrete next-step suggestions.
Why it works
Built for actual studying, not just demos.
Calibrated 0-100 rubric
Most college essays land 75-87. Reserve 90+ for genuinely strong work. We explicitly prompt against grade inflation — a 78 stays a 78.
Per-criterion breakdown
Scores for thesis, evidence, structure, style, mechanics. So you know exactly which parts to fix.
Quoted-phrase feedback
Strengths and weaknesses reference specific phrases from YOUR essay — so you know exactly what's working and what isn't.
Custom rubric support
Paste your professor's rubric and AI weights its judgment toward what they care about. Critical for class-specific styles.
Concrete next steps
2-4 specific actions to take next, not vague "improve flow." Things like "strengthen para 2's evidence by quoting page 47."
Pair with the AI essay editor
Same product includes 9 AI text actions (expand, shorten, rewrite, etc.) so you can act on the feedback inline.
vs alternatives
Why students switch to StudentHubAI
FAQ
Common questions
How accurate are the AI grades compared to a real professor?+
We've calibrated against typical college essay grading. Students report scores usually within ~5 points of what they actually receive. The per-criterion feedback is more valuable than the headline score.
Will my professor know I used this?+
No. We don't write the essay for you — we grade something you wrote. This is the same as asking a friend or tutor to review. It's not detectable because there's nothing to detect.
What if I paste my professor's rubric?+
AI weights its scoring toward your rubric's criteria. Critical for classes where the professor cares about specific elements (e.g. "thesis must be debatable").
Can it grade research papers, not just essays?+
Yes. Works for argumentative essays, analytical papers, literature reviews, research papers, and lab reports. Less optimized for creative writing.
Does it catch plagiarism?+
No — use Turnitin for that. We grade quality, not originality. Different tools for different jobs.
Can it improve my essay, not just grade it?+
Yes — our essay editor has 9 AI text actions (Expand, Shorten, Rewrite, Improve, etc.) you can apply to any highlighted text. Plus an inline cite-check tool.
How long can the essay be?+
Up to about 16,000 characters (~3,000 words / ~6 double-spaced pages). For longer papers, grade section by section.
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