1. What Is Star Rating Calculation?

Star rating calculation using weighted average is a method to compute an overall rating from multiple individual reviews, where some reviews may carry more importance (weight) than others.

2. How Does The Calculator Work?

The calculator uses the weighted average formula:

Where:

• \( review_i \) — Individual review score
• \( weight_i \) — Weight assigned to each review
• \( n \) — Total number of reviews

Explanation: The formula calculates the average of review scores where each score is multiplied by its weight, then divided by the sum of all weights.

3. Importance Of Weighted Average

Details: Weighted average provides a more accurate representation of overall rating by giving more importance to certain reviews, such as verified purchases, expert reviews, or recent ratings.

4. Using The Calculator

Tips: Enter review scores as comma-separated values (e.g., 4,5,3,4). Optionally provide weights for each review (e.g., 2,1,3,1). If no weights provided, equal weighting is assumed.

5. Frequently Asked Questions (FAQ)

Q1: Why use weighted average instead of simple average?
A: Weighted average allows certain reviews to have more influence on the final rating, providing a more accurate representation of overall sentiment.

Q2: What are typical weight values used?
A: Common weights include: verified purchase (2), regular review (1), expert review (3), recent review (1.5). Weights can be customized based on specific needs.

Q3: How should I handle decimal ratings?
A: Decimal ratings are common and acceptable. Most systems display ratings rounded to one decimal place (e.g., 4.3 stars).

Q4: What if I have different rating scales?
A: Ensure all reviews are on the same scale (typically 1-5 stars). Convert different scales to a common scale before calculation.

Q5: How often should ratings be recalculated?
A: Ratings should be updated in real-time as new reviews are added, or periodically (daily/weekly) depending on review volume.