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Overview

The Grade Calculator is a powerful tool designed to help students and educators calculate academic grades across multiple evaluation periods. It supports weighted grade components, percentage distributions, and provides both absolute and relative grade calculations.

Quick Access

See the complete user guide for step-by-step instructions

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Key Features

Multiple Evaluations

Add unlimited grade components with individual percentages

Weighted Calculations

Each grade is weighted by its percentage contribution

Target Score Planning

Calculate what you need to achieve your target grade

Color-Coded Results

Visual feedback based on performance thresholds

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How It Works

The calculator uses a weighted average formula to compute your final grade: 
// Grade calculation formula
let notaFinal = 0;
let porcentajeTotal = 0;

for (let i = 0; i < notas.length; i++) {
    notaFinal += notas[i].valor * notas[i].porcentaje / 100;
    porcentajeTotal += notas[i].porcentaje;
}

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Grade Types

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Absolute Grade (Nota Relativa)

The grade calculated relative to the percentage of coursework completed: 
let notaRelativa = (notaFinal / porcentajeTotal) * 100;
Example: If you’ve completed 60% of the course with an average of 4.2, your absolute grade is 4.2/5.0.

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Relative Grade (Nota Final)

The grade calculated relative to the entire course (100%): 
let notaFinal = notaFinal; // Already weighted
Example: Same scenario as above, your relative grade is 2.5/5.0 (60% of 4.2).
The Absolute Grade shows your current performance, while the Relative Grade shows your standing relative to the entire course.

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User Interface

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Input Fields

1

Set minimum passing grade

Enter the minimum grade required to pass the course (e.g., 3.0 on a 5.0 scale).
2

Add grade components

Click Agregar nota to add evaluation periods. Each component requires:
  • Grade value (0-100 or 0-5.0 depending on scale)
  • Percentage weight (must total ≤100%)
3

Calculate results

Click Calcular nota final to see your absolute grade, relative grade, and required scores.

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Visual Feedback

The calculator provides color-coded visual feedback:
Grade RangeColorMeaning
≥ MinimumGreenPassing
< MinimumRedFailing
Target calculationBlueRequired score

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Advanced Features

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Target Grade Calculation

If you haven’t completed all coursework, the calculator shows what grade you need on remaining evaluations to achieve your target: 
if (porcentajeTotal < 100) {
    let porcentajeFaltante = 100 - porcentajeTotal;
    let notaNecesaria = (notaMinima - notaFinal) / porcentajeFaltante * 100;
    
    document.getElementById('notaFaltante').textContent = 
        `Necesitas ${notaNecesaria.toFixed(2)} en el ${porcentajeFaltante}% restante`;
}

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Validation Rules

The sum of all percentages cannot exceed 100%. If you try to add a component that would exceed this limit, you’ll receive an error message:
if (porcentajeTotal > 100) {
    alert('El porcentaje total no puede exceder 100%');
    return;
}
Grade values must be within the valid range (0-5 for Colombian grading scale, 0-100 for percentage-based systems).
Both grade value and percentage fields are required for each component.

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Mathematical Foundation

The calculator implements standard weighted average calculations:

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Weighted Average Formula

Final Grade=∑i=1n(Gradei×Weighti100)\text{Final Grade} = \sum_{i=1}^{n} (\text{Grade}_i \times \frac{\text{Weight}_i}{100})

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Required Score Formula

Required Grade=Target Grade−Current Weighted GradeRemaining Percentage×100\text{Required Grade} = \frac{\text{Target Grade} - \text{Current Weighted Grade}}{\text{Remaining Percentage}} \times 100

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Integration with Other Features

The calculator integrates seamlessly with Playground’s other features:
  • Theme System: Respects your configured color scheme
  • Preferences: Saves your preferred grading scale
  • Export: Results can be copied to templates for sharing

User Guide

Step-by-step guide with examples

Theme Settings

Customize the calculator’s appearance

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Accessibility Features

  • Keyboard Navigation: Tab through input fields sequentially
  • Screen Reader Support: All inputs have proper labels
  • High Contrast: Color-coded results are also labeled with text
  • Responsive Design: Works on mobile and desktop devices

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Browser Compatibility

The calculator uses modern JavaScript (ES6+) and is compatible with:
  • Chrome 90+
  • Firefox 88+
  • Safari 14+
  • Edge 90+
Internet Explorer is not supported. Please use a modern browser for the best experience.

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Technical Implementation

The calculator is implemented in scriptCalculadora.js and uses:
  • Math.js: For advanced mathematical operations
  • DOM Manipulation: Dynamic form generation
  • LocalStorage: For saving user preferences
// Example: Adding a new grade component
document.getElementById('agregarNota').addEventListener('click', function() {
    let notasDiv = document.getElementById('notas');
    let nuevaNota = document.createElement('div');
    nuevaNota.innerHTML = `
        <input type="number" placeholder="Nota" class="nota">
        <input type="number" placeholder="Porcentaje" class="porcentaje">
    `;
    notasDiv.appendChild(nuevaNota);
});

Introduction

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Getting Started

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