Calculate Your Marks & Grades
Three tools in one — total marks with percentages, weighted averages for course grades, and instant conversion to US GPA, letter grade and Indian 10-point scale.
Grading scales vary by institution. The conversions here use standard US 4.0 and common Indian 10-point cutoffs. Always confirm your school's official scale for formal applications.
Academic Marks Calculator
Fill optional student details, pick a mode, enter your data, and calculate. Everything runs in your browser.
What this calculator does
Three ways to understand your marks.
Simple marks
Total marks + aggregate percentage across subjects.
Weighted average
Course grade from weighted assessments.
Scale converter
% → US GPA + letter grade + India 10.0.
Your result
Modes, formulas & worked examples
Each mode of this calculator, the math behind it, and a one-click example you can load straight into the tool.
Simple marks
Report-card totals & percentages
User case
A student wants their aggregate for a report card. Math scored 85/100 and English 42/50 — what's the overall percentage across both papers?
How it's calculated
(85+42) ÷ (100+50) × 100 → 84.67% (Grade B)
Who uses it
- Students checking report-card aggregates
- Teachers totaling exam papers across subjects
Applications
Report cards, entrance-exam aggregates, scholarship eligibility.
Weighted average
Course grades from assessments
User case
A university student scored 80% on the midterm (worth 30%) and 90% on the final (worth 70%). What's the final course grade?
How it's calculated
(80×30 + 90×70) ÷ 100 → 87.00% (Grade B+)
Who uses it
- University students with weighted course grades
- Teachers calculating final course grades
Applications
Course-grade calculation, semester GPA inputs, teacher grading.
Scale converter
% to US GPA, letter & India 10.0
User case
An international applicant has an 85% score and needs to state the equivalent US GPA and letter grade on their application form.
How it's calculated
85% falls in the 83–86% band → B (3.0 GPA, India 8.0)
Who uses it
- International applicants preparing transcripts
- Students comparing grades across systems
Applications
Study-abroad applications, transcript translation, job applications.
The conversion scale this tool uses
Standard US 4.0 cutoffs with approximate Indian 10-point equivalents. Your institution's official scale may differ — always verify before submitting applications.
| Percentage range | Letter | US GPA | India 10.0 |
|---|---|---|---|
| 97 – 100% | A+ | 4.0 | 10.0 |
| 93 – 96% | A | 4.0 | 10.0 |
| 90 – 92% | A− | 3.7 | 9.0 |
| 87 – 89% | B+ | 3.3 | 8.0 |
| 83 – 86% | B | 3.0 | 8.0 |
| 80 – 82% | B− | 2.7 | 7.0 |
| 77 – 79% | C+ | 2.3 | 6.0 |
| 73 – 76% | C | 2.0 | 6.0 |
| 70 – 72% | C− | 1.7 | 5.0 |
| 60 – 69% | D | 1.0 | 4.0 |
| Below 60% | F | 0.0 | 0.0 |
Clear, simple, transparent
What this marks calculator does, and what it doesn't — no fine print.
What this calculator does
- Totals marks across subjects with different maximums
- Computes weighted averages when weights don't sum to 100%
- Converts any percentage to US GPA, letter grade and India 10.0
- Exports a text report or shares via WhatsApp
- Runs entirely in your browser — no data leaves the page
What this calculator does not do
- Does not replace your institution's official grading scale
- Does not model bell curves or grading-on-a-curve policies
- Does not automatically drop lowest scores — do that manually first
- Does not issue official transcripts — use it for planning only
Get the most accurate result
Common pitfalls with marks calculation — and how to avoid them.
Check max marks, not just obtained
The most common mistake is leaving max marks at 100 when your paper was out of 75, 50, or 200. Always set the correct max for every subject before calculating.
Match weights to your syllabus
Check your course syllabus before entering weights. A common mistake is using round numbers (20/30/50) when the syllabus specifies 15/35/50 — the final grade can shift several percentage points.
Support decimal marks
This tool accepts decimal marks (e.g., 85.5/100) — use them when your institution awards half-marks or quarter-marks. Rounding early loses precision.
Check weights < 100% mid-semester
If your total weights sum to less than 100% (the semester isn't over), the calculator shows your current standing only. Re-run it after each new grade to see how your position evolves.
Verify scale before applications
The grading scale here is a standard reference. Before submitting to any university or employer, check whether they require a specific conversion (WES, institutional formula, or a 4.3 scale).
Don't mix marks and percentages in weighted mode
The weighted mode expects scores as percentages. If your raw score was 42/50, convert it to 84% first, then enter 84 as the score with the assessment's weight.
Frequently asked questions
Quick answers about marks, percentages and GPA conversion.
Understanding the math
Using the calculator
Ready to calculate your marks?
Run another calculation or explore more academic tools.