Google Review Calculator: Calculate Your Ratings’ Impact

Use this Google review calculator to easily determine the new average rating for your business after receiving new reviews.

Google Review Calculator

How To Use The Calculator:

  1. Enter your current average rating in the first field. (Note: It must be between 0 and 5)
  2. Input the total number of reviews you have so far in the second field.
  3. Set your desired target average rating in the third field. (Note: It should also be between 0 and 5)
  4. Click the “Calculate” button to see how many additional 5-star reviews are needed to reach your target average rating.

How It Works:

The calculator determines the number of additional 5-star reviews required to achieve a specific target average rating on Google. It calculates this by using your current average rating, the number of existing reviews, and your desired target rating to work out the necessary number of perfect reviews to reach the goal.


This tool assumes that all future reviews will be 5-star. The actual average rating may vary with the influx of diverse ratings. It also does not account for future changes in ratings algorithm by Google or future non-5-star reviews you might receive.

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