Average Rating Calculator
Enter the number of votes for each star rating to compute the overall average rating and score distribution.
Average Rating
3.73
Total Votes
100
Weighted Sum
373
| Stars | Votes | % of Total |
|---|---|---|
| 1 | 12 | 12.00% |
| 2 | 8 | 8.00% |
| 3 | 15 | 15.00% |
| 4 | 25 | 25.00% |
| 5 | 40 | 40.00% |
How to Use This Calculator
- Enter the number of votes for each star rating (1 through 5).
- Review the automatically calculated average rating.
- Use the distribution table to communicate how ratings are spread.
- Adjust counts to model improvements or compare scenarios.
Formula
Average rating = Σ(counti × starsi) / Σ(counti)
Percentage share = (counti / total votes) × 100%
The weighted mean treats each star level as a numeric score, weighted by the number of votes received.
Full Description
Average ratings help summarize customer satisfaction, product reviews, or survey responses. Because they are weighted averages, a few extreme ratings can shift the score. Viewing the full distribution clarifies whether the rating is driven by broad consensus or a mix of high and low scores.
This calculator is ideal for marketplaces, support performance reviews, and classroom assessments where star ratings are commonly used.
Frequently Asked Questions
Can I use half-star increments?
Yes. Convert half-star ratings into the nearest integer bucket after scaling (e.g., multiply by 2) or treat them as full votes in the closest star level.
What if there are no votes?
The calculator displays 0 for averages and percentages, indicating insufficient data.
How do I track improvements over time?
Update counts periodically, compare average ratings, and examine percentage shifts across star levels.
Can I change the number of star levels?
This calculator is set up for five-star systems. For different scales, adjust the number of inputs accordingly.