Grade Calculator
Calculate your weighted school grades, percentages, and letter grades instantly.
Assignments & Scores
Letter Grade: B (Passed)
88.5%
Sum of simple scores is 237 out of 270 points.
- Total Earned Points
- 237
- Maximum Points Possible
- 270
- Final Percentage
- 88.5%
- Letter Grade
- B
Working
Weighted Grade = [ Sum( (Score ÷ Max) × Weight ) ÷ Sum(Weights) ] × 100 = 88.5%This is a mathematical grade conversion tool. Academic grading criteria, scales, curves, and credit weighting policies are governed uniquely by individual schools, boards, and professors. Verify specific syllabus rules.
About this calculator
Calculating your current class grades, semester totals, or the exact exam score required to pass is essential for academic planning. This grade calculator computes both simple unweighted and custom weighted grade percentages, translating results into transparent letter equivalents.
How to use this calculator
Choose unweighted or weighted mode
Select "Simple" scoring if every point carries equal weight. Choose "Weighted" if categories (homework, midterms, finals) represent distinct shares of your final mark.
Input assignment scores and maxima
Enter the points earned and the total maximum possible points for each subject, test, assignment, or paper.
Assign target category weights
If using weighted mode, assign percentage or absolute weights to each row. The calculator normalizes weights dynamically.
Review final percentage and letters
Examine your aggregated class percentage and letter grade. Use the default 10-point scale or compare it against your school’s unique grading guidelines.
Formula
Weighted Grade = Sum( (Score_i ÷ Max_i) × Weight_i ) ÷ Sum(Weights) × 100- Score_i is the points earned on assignment i.
- Max_i is the total possible points on assignment i.
- Weight_i is the percentage share or multiplier assigned to assignment i.
- Simple unweighted grades are calculated as (Total Earned Points ÷ Total Maximum Points) × 100.
- Letter grades are derived using a standard 10-point scale: A (>=90%), B (80-89%), C (70-79%), D (60-69%), and F (<60%).
Worked example
Inputs
- Homework 1 (Weight: 1): 40 out of 50 possible points (80% basis)
- Final Exam (Weight: 3): 90 out of 100 possible points (90% basis)
- Mode: Weighted average
Calculation
HW Fraction = 40 / 50 = 0.80
Exam Fraction = 90 / 100 = 0.90
Total Weight = 1 + 3 = 4
Weighted Score Sum = (0.80 * 1) + (0.90 * 3)
= 0.80 + 2.70
= 3.50
Weighted Percentage:
Percentage = (3.50 / 4) * 100
= 87.50%
Letter Grade (Standard scale) = BYour final weighted grade is 87.50%, which represents a letter grade of B under standard academic evaluation.
What the result means
- Total Score is the absolute sum of all individual points earned across your entries (simple unweighted).
- Total Max Score is the complete sum of potential points you could have achieved.
- Grade Percentage represents your aggregated performance ratio. An 87.5% means you secured 87.5% of the total weighted credits.
- Letter Grade is the standard alphabetical tier mapping of your score. Grading scales vary significantly by country and institution.
Related calculations
- Calculate standard percentage differences to compare your class averages across different terms.
- Vary your final exam weight and score to find the exact target exam grade required to pass with an A.
- Combine homework averages into a single simple row to build a complete semester GPA planning tracker.
Frequently asked questions
What is the difference between simple and weighted grades?
Simple unweighted grading treats every single point equally: your final mark is simply the total points earned divided by the total possible points. Weighted grading assigns custom percentages or multipliers to different categories. For example, if a final exam is worth 50% of your grade, a single question on that exam carries far more weight than multiple homework sheets.
How do I calculate a weighted grade percentage manually?
To calculate a weighted grade, convert each individual assignment score to a decimal fraction (Score ÷ Max). Multiply each decimal fraction by its corresponding weight. Add all these weighted products together, and then divide that sum by the total of all the weights combined. Finally, multiply by 100 to get the percentage.
What is the standard grading scale used by this calculator?
This calculator defaults to the popular US 10-point academic grading scale: A (90% to 100%), B (80% to 89.9%), C (70% to 79.9%), D (60% to 69.9%), and F (below 60%). Because grading systems vary by country, state, school district, and university, you should verify your institution’s unique syllabus guidelines.
How do I calculate what score I need on my final exam to pass?
To find the required score on a final exam, use the formula: Required = [ Target Grade − Current Grade × (1 − Exam Weight) ] ÷ Exam Weight. For instance, if you have an 80% today and want a final grade of 85%, and the final exam represents 20% of your total grade, you need: [ 85 − 80 × 0.80 ] ÷ 0.20 = [ 85 − 64 ] ÷ 0.20 = 21 ÷ 0.20 = 105% (extra credit required!).
Can I use this calculator for GPA (Grade Point Average) planning?
Yes, you can use this calculator for simple GPA calculations by entering your class credit hours as weights, and your converted class points (e.g. A=4, B=3, C=2, D=1, F=0) as the scores (out of a max score of 4). The final weighted percentage divided by 25 will give you your cumulative GPA on a standard 4.0 scale.
How does a zero score affect my final course average?
Failing to submit an assignment resulting in a zero score has a devastating effect on your final course average, especially under high weight categories. A zero not only gives you no points but still keeps the total possible points (the denominator) unchanged, severely pulling down your cumulative average.
Related calculators
Percentage Calculator
Calculate percentages, increases, decreases and differences instantly.
Average Calculator
Calculate mean, median, mode, range and standard deviation instantly.
Browse all everyday life calculators or see the full list of calculators.