Average Star Rating Calculator

Formula

The formula to calculate the average star rating is:

\[ AR = \frac{1 \cdot a + 2 \cdot b + 3 \cdot c + 4 \cdot d + 5 \cdot e}{R} \]

Where:

\(AR\) is the average rating
\(a\) is the number of 1-star ratings
\(b\) is the number of 2-star ratings
\(c\) is the number of 3-star ratings
\(d\) is the number of 4-star ratings
\(e\) is the number of 5-star ratings
\(R\) is the total number of ratings

What is Average Rating?

An average rating is a measure of what a given customer base or population on average rates a certain product or service. It provides an insight into overall customer satisfaction and helps businesses identify areas for improvement.

Example Calculation 1

Let's assume the following values:

Number of 1-star ratings (a) = 10
Number of 2-star ratings (b) = 20
Number of 3-star ratings (c) = 30
Number of 4-star ratings (d) = 25
Number of 5-star ratings (e) = 15

Using the formula:

\[ AR = \frac{1 \cdot 10 + 2 \cdot 20 + 3 \cdot 30 + 4 \cdot 25 + 5 \cdot 15}{100} = 3.00 \]

The Average Rating is 3.00 stars.

Example Calculation 2

Let's assume the following values:

Number of 1-star ratings (a) = 5
Number of 2-star ratings (b) = 10
Number of 3-star ratings (c) = 15
Number of 4-star ratings (d) = 20
Number of 5-star ratings (e) = 50

Using the formula:

\[ AR = \frac{1 \cdot 5 + 2 \cdot 10 + 3 \cdot 15 + 4 \cdot 20 + 5 \cdot 50}{100} = 3.90 \]

The Average Rating is 3.90 stars.