How is a weighted average grade calculated?

Multiply each assignment's percentage score by its weight (as a decimal), sum the products, then divide by the sum of the weights. For example, an assignment scored 80% with weight 30 contributes 24 to the weighted total.

How do I find out what I need on the final exam?

Use the 'Final Needed' tab. Enter your current course average, the percentage of the course already completed (the work-so-far weight), the weight of the final exam, and your target overall grade. The calculator will return the score you need on the final.

What letter grade is 75%?

On the standard US 10-point scale 75% is a C. On the UK undergraduate scale it is a 2:1 (Upper Second). The calculator shows both classifications next to your final percentage.

Can the final-needed score be over 100%?

Yes. If the calculator returns a value above 100% it means your target grade is mathematically impossible given the work already completed. You will need to lower your target or seek extra-credit options.

Can I add as many assignments as I want?

Yes. Click 'Add row' to add another assignment. The weights do not need to sum to 100 — the calculator normalises them for you.

🎓 Grade Calculator

Compute weighted course averages or find out what you need on the final exam to hit your target grade.

AssignmentScore (%)Weight

ℹ️ For reference only. Always check your course syllabus or contact your instructor for official grade calculations and rounding rules.

About the Grade Calculator

The Grade Calculator handles two of the most common student questions: "what is my current grade?" and "what do I need on the final?". Both calculations run entirely in your browser — your data is never sent anywhere.

How weighted-average grades work

If your course mixes homework, quizzes, midterms and a final, each component has a weight that says how much it counts toward the overall grade. The weighted average is:

Average = Σ (score × weight) / Σ (weights)

For example, scoring 90% on homework (weight 20) and 70% on the midterm (weight 30) gives (90·20 + 70·30) / (20+30) = (1800+2100)/50 = 78%. The calculator does this for any number of rows and normalises the weights for you, so you don't need to make them sum to exactly 100.

How the "final needed" calculation works

If you know your current course average C, the percentage of the course already graded w_now, the weight of the final w_fin, and your target overall grade T, then the required final score is:

Required = (T·(w_now + w_fin) − C·w_now) / w_fin

If the result is above 100%, the target is unreachable — the calculator will tell you so plainly.

Grading scales used

US letter grade: A (≥ 90%), B (80–89%), C (70–79%), D (60–69%), F (< 60%).
UK degree class: First (≥ 70%), 2:1 (60–69%), 2:2 (50–59%), Third (40–49%), Fail (< 40%).

Common uses

End-of-semester planning — what do I need on the final?
Tracking GCSE / A-level / IB coursework progress through the year
University module averages with mixed assessment weightings
Quickly checking if a missed assignment changes your overall grade

Frequently Asked Questions

Do my weights have to add up to 100? No. The calculator normalises whatever weights you enter, so you can use raw points, percentages or any other proportional scale.

What does the "Difficulty" rating mean? It compares the required final score to your current average and labels the gap (Easy, Moderate, Tough or Impossible) so you know how aggressive your target is.

Can I drop a low score? The calculator does not auto-drop scores. If your course allows the lowest grade to be dropped, simply leave that row out and the rest will average correctly.

Why does the result differ slightly from my school portal? Some institutions round differently (some round each component first, others round only the final result). For an exact match, follow your syllabus's rounding rules.

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Important Note: This tool is intended to provide estimates and should not be used as a substitute for official institutional records. Information generated by these calculators may be incomplete and does not account for your school's specific rounding or credit-weighting rules. Always verify with your institution before relying on these results.

Related Calculators

GPA Calculator — Calculate your cumulative GPA from multiple subjects using letter grades and credit hours.
Final Grade Calculator — What score do I need on my final exam to hit my target grade? Works for any weighting.
Percentage Calculator — Calculate percentages, increases, decreases and percentage of.