Five Star Rating Calculator
Calculate weighted average star rating from 1-5 star vote counts with total votes and distribution breakdown.
What Is a Five Star Rating Average?
A five star rating average is a weighted mean of vote counts from 1 to 5 stars. Each star level is multiplied by its rating value, summed, and divided by total votes. Use the Mean Calculator for general averages or the Descriptive Statistics Calculator for broader summaries.
Weighted Average Rating Formula
$$\text{rating} = \frac{5r_5 + 4r_4 + 3r_3 + 2r_2 + r_1}{r_5 + r_4 + r_3 + r_2 + r_1}$$
where $r_i$ is the number of votes at star level $i$.
How to Interpret Star Ratings
Research suggests ratings between 4.2 and 4.5 often appear most trustworthy to customers. A perfect 5.0 can seem unrealistic. Track both the average and the distribution to see whether ratings cluster at the top or spread across levels.
Frequently Asked Questions
How do I calculate average star rating from vote counts?
Multiply each star count by its star value (5×count for 5-star votes, etc.), add the products, and divide by total votes. This gives the weighted average rating.
What is a good average five star rating?
Ratings around 4.2 to 4.5 are often seen as credible. Perfect 5.0 averages may raise skepticism. Context matters: niche products and mass-market apps have different benchmarks.
How do I raise my average from 3.5 to 4.0?
You need a steady stream of 4- and 5-star reviews. The number of new positive reviews required depends on how many low ratings you already have. More past low ratings means more new high ratings needed.
Is the average the same as the median star rating?
No. The average is weighted by star value. The median is the middle rating when all individual votes are listed in order. Skewed distributions can make these differ noticeably.
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