The Harvard University Entrance Probability Calculator estimates your admission chance based on academic metrics and holistic factors.

How this calculator works

The calculator converts the most relevant application components—GPA, standardized tests (SAT/ACT), class rank, AP/IB coursework, extracurricular involvement, recommendation strength, essay quality, research/internship experience, and demographic or legacy considerations—into a normalized score. Each component has a weight reflecting typical admissions emphasis. The weighted sum becomes a probability score between 0% and 100% and is shown as an interactive gauge and breakdown chart.

Why use the calculator

You can use the tool to understand where to focus improvement, compare scenarios (for example, stronger essays vs stronger test scores) and to set realistic expectations. It’s not an official predictor—Harvard’s admissions are holistic and confidential.

Inputs explained

• GPA: Unweighted or weighted GPA on a 4.0 scale. Strong predictor of academic preparedness.
• SAT/ACT: Enter SAT sum (out of 1600) or ACT composite. The calculator normalizes between test formats.
• Class Rank: Percentile rank in class; lower is better (e.g., top 5%).
• AP/IB: Number of advanced-level courses — shows rigor of curriculum.
• Extracurriculars: Depth and leadership; a scale measures impact versus participation.
• Recommendations: Strength and specificity from teachers or mentors.
• Essay: Personal statement and supplemental essays’ persuasiveness and fit.
• Research/Internship: Significant for certain applicants, especially STEM.
• Legacy/URM/FirstGen: Positive or negative modifiers to reflect admission realities.

Interpreting the probability

The output is an estimated probability, not a guarantee. A higher score reflects alignment with historical admit profiles, but Harvard evaluates fit, institutional needs, and qualitative traits not captured numerically.

Tips for improving your standing

1. Strengthen GPA and coursework rigor: prioritize core subjects and take available honors/AP/IB courses.
2. Improve testing selectively: consider targeted SAT/ACT prep if your scores lag peers.
3. Deepen extracurricular impact: sustained leadership and measurable achievements matter more than many short commitments.
4. Polish essays with multiple revisions and external feedback.
5. Secure recommenders who know you well and can provide specific anecdotes.
6. Consider research, internships, or projects that show initiative and contribution.

Visual output explained

The calculator uses Plotly.js to render:

• A gauge showing an overall admission probability.
• A bar chart breaking down weighted contributions by component.
• A radar or donut optional view for quick comparison.

These visuals help you focus: which inputs pull your probability up or push it down?

Example scenario

Imagine a student with a 3.9 GPA (unweighted), a 1510 SAT, top 10% class rank, five AP/IB courses, strong extracurricular leadership, excellent recommendations, high-quality essays, and research. In the tool, these inputs will collectively push the probability into a stronger bracket. If that student lowers essays or recommendations, the gauge can fall significantly—demonstrating the holistic balance Harvard values.

How weights are assigned

Weights in the calculator reflect common admissions emphasis: GPA and course rigor typically carry the most weight, followed by standardized tests (if submitted), essays, recommendations, and extracurricular impact. Research and internships get higher weighting for applicants pursuing STEM or research tracks. The tool makes weights transparent so users can see how shifting one input changes the total.

Best practices for using the tool

• Run multiple scenarios: compare conservative and ambitious inputs to visualize realistic ranges.
• Focus on marginal gains: a small uptick in essays or recommendation strength can sometimes move probability more than a test increase.
• Use visuals to prioritize: the bar chart highlights components with the biggest shortfalls so you can allocate effort efficiently.

Final thoughts

Use the calculator as a guide to make strategic, data-informed decisions about preparation and application priorities. While numbers help clarify strengths and weaknesses, remember that compelling stories, context, and personal fit remain central to admission outcomes. Treat the probability as a planning tool—one that helps you set goals, allocate time, and improve your application in measurable ways.

Disclaimer

This calculator offers an estimate only and is not affiliated with or endorsed by Harvard University. It runs entirely in your browser and is intended for planning, not prediction. Admissions decisions are holistic and based on factors beyond numeric inputs. Use results as guidance and consult official Harvard resources and counselors for authoritative advice.

FAQ

Q: Is this calculator accurate?
A: It provides an informed estimate based on weighted inputs but cannot replicate the admissions committee’s holistic evaluation.

Q: Should I focus on test scores or extracurriculars?
A: Balance matters. High academic metrics open doors; extracurricular impact and essays distinguish applicants.

Q: Do legacy or URM statuses guarantee admission?
A: No. They can be factors in holistic review but do not guarantee admission.

Q: Will my data be stored?
A: All calculations are performed locally; no data is sent to servers. Clear your browser if you want to remove local values.

Q: Can this replace guidance counselors?
A: No. Use this as a supplement alongside counselor advice and official resources.