Grade Calculator Project
Build a calculator that computes final grades based on weighted assignments
What You'll Build
Create a grade calculator that helps students calculate their final grade based on different types of assignments (homework, quizzes, exams) with different weights. This project will help you practice:
- Working with numbers and arithmetic operators
- Using variables to store and update values
- Implementing weighted calculations
- Formatting output with proper decimal places
- Handling user input validation
Prerequisites: Before starting this project, make sure you've completed:
Project Steps
1. Set Up the HTML Structure
Create a new file called index.html with this structure:
2. Add the JavaScript Logic
Create a new file called script.js and add the grade calculation logic:
3. Style Your Calculator
Create a new file called styles.css to make your calculator look professional:
How It Works
Grade Calculation Formula
The final grade is calculated using this weighted formula:
Final Grade = (Homework × 0.3) + (Quizzes × 0.3) + (Midterm × 0.15) + (Final × 0.25) Where:
- Homework is worth 30% of the final grade
- Quizzes are worth 30% of the final grade
- Midterm exam is worth 15% of the final grade
- Final exam is worth 25% of the final grade
Challenge Yourself
Once you have the basic calculator working, try these enhancements:
- Add input validation to ensure grades are between 0 and 100
- Add a feature to calculate the minimum final exam score needed to achieve a desired grade
- Implement a grade scale that converts numerical grades to letter grades (A, B, C, etc.)
- Add the ability to customize the weight of each component
- Create a visual representation of the grade distribution using a chart or graph
Pro Tips:
- Use
parseFloat()to convert string inputs to numbers - Use
.toFixed(2)to round numbers to 2 decimal places - Consider edge cases like missing inputs or invalid numbers
- Add helpful error messages for better user experience