Grade Calculator — Calculate Weighted Average Grade and GPA

How to Use the Grade Calculator

1. Open the grade calculator.
2. For each completed assignment or assessment, enter the score achieved and the weight (percentage of the total grade it counts for).
3. If you have remaining assignments with known weights, enter 0 as the current score and the tool will calculate what score you need to achieve your target overall grade.
4. Click Calculate. The tool shows your current weighted average, your letter grade classification, and the required score on remaining work.
5. Enter a target grade to see exactly what you need on any remaining assessments.

Calculating a Weighted Average

A weighted average accounts for the fact that different assignments contribute differently to the final grade. The formula is:

Weighted average = Σ(score × weight) / Σ(weights)

Example: Three assessments for a course:

• Coursework 1: 72%, weight 20%
• Coursework 2: 65%, weight 30%
• Final exam: 78%, weight 50%

Weighted average = (72 × 0.20) + (65 × 0.30) + (78 × 0.50) = 14.4 + 19.5 + 39.0 = 72.9%

The simple average would be (72 + 65 + 78) / 3 = 71.7% — different because the final exam carries more weight.

Grading Scales Comparison

US Letter Grade to GPA Conversion

Calculating GPA

GPA (Grade Point Average) is the standard US and Canadian measure of academic performance. It is calculated as the credit-weighted average of GPA points for all courses taken.

Example: Three courses in one semester:

• Calculus (3 credits): B+ = 3.3 GPA points → 3 × 3.3 = 9.9
• History (3 credits): A = 4.0 GPA points → 3 × 4.0 = 12.0
• Physics (4 credits): B = 3.0 GPA points → 4 × 3.0 = 12.0

GPA = (9.9 + 12.0 + 12.0) / (3 + 3 + 4) = 33.9 / 10 = 3.39 GPA

The GPA calculator handles multiple courses with different credit weights and tracks cumulative GPA across semesters.

What Score Do You Need on the Final?

If you have completed some assessments and know the remaining weights, you can calculate the required score on remaining work:

Required final score = (Target grade − Current weighted total) / Remaining weight

Example: Current score is 68% (from 70% of the total grade). You need a 72% overall. Final exam is 30% of the total grade.

Current contribution: 68 × 0.70 = 47.6%. Target: 72%. Required from final: 72 − 47.6 = 24.4%. Divide by final weight: 24.4 / 0.30 = 81.3%.

You need 81.3% on the final exam to achieve a 72% course grade. The grade calculator automates this calculation for any number of remaining assessments.

UK University Degree Classifications

UK degree classifications work differently from the GPA system:

• First-class honours (First or 1st): 70% or above weighted average across all classified modules
• Upper second-class honours (2:1): 60–69%
• Lower second-class honours (2:2): 50–59%
• Third-class honours (Third or 3rd): 40–49%
• Ordinary degree (pass): Below 40% — passes without honours classification

Most UK universities use a classification algorithm that gives additional weight to final year modules over earlier years. Many calculate based on the best result from: (a) weighted average of all classified modules, or (b) the classification where the majority of credit falls. Rules vary by institution — check your student handbook for the exact algorithm.

Grade Boundaries and Mark Schemes

Grade boundaries (the exact percentage thresholds for each grade) vary between exam boards, subjects, and years. For A-level and GCSE, Ofqual requires exam boards to set grade boundaries after marking is complete, based on the difficulty of that year's paper — so a 70% may be an A one year and a B another year.

For university modules, grade boundaries are typically fixed (70% = First, 60% = 2:1, etc.) and do not adjust year-to-year, though some departments use discretionary borderline considerations.

Grade Improvement Strategies

Identify high-weight assessments early

If a final exam counts for 60% of the total grade, a 10-point improvement on the final has 3× the impact of a 10-point improvement on a 20% assignment. Focus effort proportionally to assessment weight — the grade calculator helps visualise this by showing how much each assessment contributes.

Calculate the cost-benefit of borderlines

If you are near a grade boundary (e.g., a 2:1 at 59.5%), understand exactly how much more you need across remaining work to cross it. Sometimes a small amount of additional work on one assignment can secure a grade upgrade; the calculator shows the target precisely.

Common Questions

What is the difference between weighted and unweighted GPA?

An unweighted GPA uses the same 4.0 scale for all courses regardless of difficulty. A weighted GPA (used by many US high schools) gives additional GPA points for advanced courses: AP courses may count an A as 5.0 instead of 4.0. The extra weight reflects the greater challenge. Colleges receiving weighted GPAs typically recalculate to an unweighted basis for fair comparison between students from different schools.

Do all universities use the same grading scale?

No. In the UK, standard thresholds are 70% / 60% / 50% / 40%, but some universities adjust these slightly and have different rules for borderline cases, profiling, and discretionary upgrades. US universities also vary — some use straight-line percentages; others use different letter grade cutoffs. Always check your specific institution's grading policy.

How is pass/fail calculated at university?

For a UK degree, each module is typically passed by achieving at least 40% (or the institution's pass mark — some professional programmes require higher). Some modules may be re-sat if failed, typically capped at 40% after the re-sit. A degree is awarded if all required modules are passed and the credit requirements are met. A module pass/fail does not directly map to degree classification — classification uses weighted grade averages.