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How many 5-star reviews to reach your goal
Type the star rating and the review count from your Google Business Profile, then a target. The page tells you how many new 5-star reviews it takes to get there. The math runs in your browser.
| Target | New 5-star reviews |
|---|---|
| 4.0 | 0 new 5-star reviews |
| 4.2 | 0 new 5-star reviews |
| 4.5 | 48 new 5-star reviews |
| 4.7 | 134 new 5-star reviews |
| 4.8 | 240 new 5-star reviews |
| 4.9 | 560 new 5-star reviews |
A worked example
A profile at 4.2 stars from 80 reviews wants 4.5. The gap to the target is 0.3 stars. Multiply that by the 80 reviews you already have and you get 24. The gap between 5 and the target is 0.5. Divide 24 by 0.5 and you get 48. Forty-eight new 5-star reviews bring the total to 128 and the exact average to 4.50. That is the number the form shows when you first open the page. Change the fields and the result changes with them.
How the count is worked out
Every existing review pulls the average. A new 5-star review pulls it up, but it is diluted by all the reviews that came before it. The smallest whole number of new 5-star reviews that lifts the exact average to the target is:
reviews you have, times the gap between the target and the current rating, divided by the gap between 5 and the target, rounded up.
If the target is already at or below the rating you typed, the answer is zero. You do not need more 5-star reviews to hold a bar you have already cleared. New reviews that are not 5 stars can still drop you under it.
If you have no reviews yet, there is no average to repair. One 5-star review makes the average 5.0, which clears any target of 5.0 or below.
What Google shows, and what this page assumes
On a Business Profile, the rating next to your name is an average of the star ratings, shown to one decimal place. This page uses the tenth you type as if it were exact. Enter the figure Google shows, such as 4.2, not a longer number. If that tenth was rounded, the true average sits a little above or below it, and the count of reviews you need can shift by a few.
The page also assumes the reviews you already have stay put. Reviewers can edit or remove a review later, and either change moves the average. It does not estimate how many people will actually leave a review, and it does not suggest asking only the customers you expect to be happy. A 4-star review is a real review. It just is not one of the 5-star reviews this count is adding up.
What to do with the number
A small gap on a busy profile can still be a large count. Going from 4.2 to 4.5 with 80 reviews takes 48 perfect new reviews. Going from 4.8 to 4.9 with 200 reviews takes 200. The table under the form shows several targets for the same starting point so you can see which tenth is realistic. Chasing 4.9 from a low rating and a long history is a slow project. Replying to the reviews you already have is separate work, and it does not change this arithmetic.
When you want a draft reply for each new review, MagicReply writes one from the review text for you to edit before it is posted.