Grade Average Calculator

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Grade Average Calculator
Simple Average (All tasks equal)Weighted Average (Different weights/credits)
Grade (0-100 or Points)
Weight (%) or Credits
Results:

Grade Average = —
function calculateGrade(){var type=document.getElementById('calc_type').value;var sumProd=0;var sumWeight=0;var count=0;var gradesSum=0;var details="";for(var i=1;i<=6;i++){var g=parseFloat(document.getElementById('g'+i).value);var w=parseFloat(document.getElementById('w'+i).value);if(!isNaN(g)){count++;gradesSum+=g;if(type==='weighted'){var weight=isNaN(w)?0:w;sumProd+=(g*weight);sumWeight+=weight;}else{sumProd+=g;sumWeight+=1;}}}if(count===0){alert('Please enter at least one grade');return;}var finalAvg=0;if(type==='weighted'){if(sumWeight===0){alert('Weights must sum to more than 0 for weighted average');return;}finalAvg=sumProd/sumWeight;details="Weighted Calculation: Sum(Grade x Weight) / Sum(Weights)";}else{finalAvg=gradesSum/count;details="Simple Calculation: Sum of Grades / Number of Items";}document.getElementById('resultValue').innerHTML=finalAvg.toFixed(2);if(document.getElementById('steps').checked){document.getElementById('stepDetails').innerHTML=details+"
Items Processed: "+count;}else{document.getElementById('stepDetails').innerHTML="";}}

How to Use the Grade Average Calculator

Our grade average calculator is designed to help students and teachers quickly find the mean score for assignments, tests, or entire semesters. Whether you are dealing with a simple list of scores or complex weighted categories, this tool provides precise results instantly.

To get started, follow these steps:

1. Select Calculation Type
Choose "Simple Average" if every assignment has the same impact on your grade. Choose "Weighted Average" if certain items (like a final exam) are worth more than others.
2. Enter Your Grades
Input your numerical scores in the "Grade" column. You can use percentages (0-100) or raw points.
3. Enter Weights (Optional)
If using the weighted mode, enter the percentage weight or credit hours for each grade in the right-hand column.

How It Works: The Formulas

Understanding the math behind your grades helps you plan for future exams. The grade average calculator uses two primary formulas:

Simple Arithmetic Mean

This is used when all items carry the same weight. You simply add all grades and divide by the total number of items.

Average = (G1 + G2 + … + Gn) / n

Weighted Average

In most college courses, assignments are weighted. A 20% midterm is worth more than a 5% quiz. The formula multiplies each grade by its weight, sums those products, and divides by the total weight.

Weighted Average = Σ (Grade × Weight) / Σ Weights

Example Calculations

Scenario: A student has three assignments worth 20% each and one final project worth 40%.

  • Assignment 1: 85 (Weight 20)
  • Assignment 2: 90 (Weight 20)
  • Assignment 3: 80 (Weight 20)
  • Final Project: 95 (Weight 40)

Step-by-Step Solution:

  1. Multiply each: (85*20)=1700, (90*20)=1800, (80*20)=1600, (95*40)=3800
  2. Sum the products: 1700 + 1800 + 1600 + 3800 = 8900
  3. Sum the weights: 20 + 20 + 20 + 40 = 100
  4. Divide: 8900 / 100 = 89.00
  5. Final Grade: 89% (B+)

Common Questions

What is the difference between a GPA and a grade average?

A grade average is typically a percentage (0-100), while a GPA (Grade Point Average) converts those percentages into a 4.0 or 5.0 scale. This grade average calculator provides the percentage-based mean which is the first step in determining your GPA.

What if my weights don't add up to 100?

Our calculator handles this automatically. If your weights add up to 80 (perhaps because the final exam hasn't happened yet), the calculator will divide the weighted sum by 80 to show you your current "running" average in the course.

How can I raise my average?

To raise your average effectively, focus on the "Weighted" categories that have the highest value. A small improvement in a category worth 40% of your grade will move your final average much more than a perfect score on a quiz worth only 2%.

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