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Measured on six things

Free tool to compute weighted average grades, GPA, CGPA, ...

Security

HTTPS and HSTS in place, but header probe scores 5/12: no CSP, frame protection, or Referrer-Policy, and DMARC is missing. No published security or privacy depth.

Screenshots

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Grade Average Calculator

About this app

Grade Average Calculator is a free web-based tool that helps students and educators quickly compute average grades from quizzes, assignments, tests, and exams. It supports both simple and weighted averages, with live updates as you type. The tool also includes related calculators for GPA, CGPA, semester grades, final grades, and percentage conversions. Designed for ease of use, it allows you to enter scores in percentage, letter, or points format, set weights according to your syllabus, and add or remove rows as needed. The Target Average feature helps you plan what you need on future assessments. With no sign-up required, it's a handy companion for academic planning and grade tracking.

Key features

1Simple and weighted average calculation with live updates as you type.
2Target Average planner estimating the score needed on a future assessment.
3Related calculators for GPA, CGPA, semester grades, final grades, and percentages.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

High school and college students

Pain points

Struggling to manually calculate weighted grades and predict needed scores for target averages

Primary needs

Quick, accurate grade calculation with weighted categories and target planning

Demographic

Teachers and professors

Pain points

Time-consuming grade averaging and explaining grade calculations to students

Primary needs

Easy-to-use tool for demonstrating grade math and helping students understand their standing

Demographic

Parents of students

Pain points

Difficulty understanding their child's grades and how different assessments affect overall performance

Primary needs

Simple interface to compute averages and explore scenarios for academic support

Scout Review

Written by AI from measured evidence, scored out of 100.

Grade Average Calculator is a fast, free, no-sign-up tool that does one job well: compute simple and weighted averages with live updates and a Target Average planner. The site is clean, the instructions are thorough, and the performance is excellent. Where it falls short is differentiation and security hygiene — the header configuration is thin, accessibility has two real failures, and the product is functionally close to existing free calculators. It is a solid utility, not yet a standout.

Measure by measure

Usability

Zero-friction: no sign-up, pre-filled samples, live updates, clear step-by-step instructions and worked formula examples. Related calculators linked, but no dedicated help center.

Design

Clean single-column calculator with a live output panel and consistent spacing, but visually generic with minimal branding and no custom illustration or demo media.

Speed

Lighthouse 100/100 on both mobile and desktop, LCP 935ms, CLS 0, TBT 31ms. Genuinely fast, lightweight page with no heavy framework overhead.

Security

HTTPS and HSTS in place, but header probe scores 5/12: no CSP, frame protection, or Referrer-Policy, and DMARC is missing. No published security or privacy depth.

Accessibility

Lighthouse accessibility 93/100 with two real failures: unnamed buttons and insufficient color contrast. No accessibility statement or multi-language support found.

Growth

Real, recurring student need with a Target Average planning hook and a calculator cluster, but the category is crowded with free tools and the wedge is thin.

Improvement areas

Thin HTTP security headers (no CSP, frame protection, Referrer-Policy, or DMARC).
Two Lighthouse accessibility failures: unnamed buttons and insufficient color contrast.
Limited differentiation from existing free grade calculators; no help center or docs site.

Design & Usability

The design is competent and unremarkable: a single-column calculator with a live output panel, consistent spacing, and a text logo. It works, but nothing signals craft or brand. Usability is the stronger half — no sign-up, pre-filled sample values, live updates as you type, and a genuinely useful 'How to use' section with worked weighted-average examples. Related calculators are linked from the homepage, though there is no dedicated help center or docs site. For a free utility aimed at students, this is above-average execution on the flow that matters most: land, enter scores, read result.

Speed & Security

Speed is the standout: Lighthouse 100/100 on both mobile and desktop, LCP 935ms, CLS 0, TBT 31ms. The page is lightweight and snappy, exactly what a calculator should be. Security is the weak spot. HTTPS and HSTS are enforced, but the header probe scores only 5/12 — no CSP, no frame protection, no X-Content-Type-Options, no Referrer-Policy, no Permissions-Policy, and DMARC is missing. There is no published security page, audit, or privacy-policy depth to inspect. For a no-login tool handling no sensitive data the risk is modest, but the hygiene is thin.

Accessibility & Growth

Accessibility lands at 93/100 on Lighthouse, with two concrete failures: buttons without accessible names and insufficient color contrast. There is no accessibility statement and no multi-language support. Growth is a judgement on the idea: the problem is real and recurring, the Target Average planning field is a genuine differentiator, and the cluster of related calculators (GPA, CGPA, semester, final grade) gives users a reason to stay. But the category is crowded with free tools like GradeCalc.info, and the wedge is a feature rather than a moat. The domain is roughly three months old with only a Facebook profile listed — early, not disqualifying.

Conclusion

If you need a quick weighted-average check before an exam, this does the job without friction and loads instantly. If you are choosing between free grade calculators, the Target Average field and the related-calculator cluster are the reasons to pick this one. It is early, competent, and worth bookmarking — just do not expect it to replace your institution's official grade policy.

Suggestions for improvement

Add a Content-Security-Policy, X-Frame-Options, Referrer-Policy, and DMARC record to close the obvious header gaps.
Fix the two Lighthouse accessibility failures: give every button an accessible name and raise text contrast to WCAG AA.
Publish a short privacy policy and an accessibility statement to build trust with schools and parents.
Differentiate harder: expand the Target Average planner into a full 'what do I need on the final' scenario tool with saved/shareable links.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	Grade Average Calculator	GradeCalc.info
Weighted average calculation	Yes — per-row weights with live output	Yes — weighted categories supported
Target Average / needed-score planning	Yes — Target Average field estimates needed score	Not a headline feature
Input formats (percentage / letter / points)	Percentage, Letters, Points with preset conversions	Numeric and letter grades
Related academic calculators	GPA, CGPA, semester, final grade, percentage	GPA and grade calculators
Sign-up required	No	No
Measured page performance	Lighthouse 100/100 mobile and desktop	Not measured in this review